circadian rhythm
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C1 noun sɜːrˈkeɪdiən ˈrɪðəm

circadian rhythm

ritmo circadiano
Meaning
The body's natural sleep-wake cycle that occurs within 24 hours
Example
Exposure to natural light regulates the circadian rhythm.
La exposición a la luz natural regula el ritmo circadiano.
C1 verb /ˈməʊbɪlaɪz/

mobilize

movilizar
Meaning
to organize or prepare people or resources for action
Example
The leader worked hard to mobilize the community for the protest.
El líder trabajó duro para movilizar a la comunidad para la protesta.
C1 noun ˈsɒl.vən.si

solvency

la posesión de activos en exceso de pasivos; capacidad para pagar deudas
Meaning
The possession of assets in excess of liabilities; ability to pay debts.
Example
The company's solvency improved after restructuring.
La solvencia de la empresa mejoró después de la reestructuración.
C1 noun /ˈfɪɡjərˌhɛd/

figurehead

cabeza simbólica
Meaning
a nominal leader with no real power; a symbolic head
Example
The king was merely a figurehead with no real authority.
El rey era simplemente un líder simbólico sin poder real.
C1 verb dɪˈlɪnieɪt

delineate

delinear
Meaning
To describe or portray something precisely
Example
The artist delineated the scene in intricate detail.
El artista delineó la escena con detalles intrincados.
C1 noun /pɜːrl drɒp/

Pearl drop

gota de perla
Meaning
a single pearl used as jewelry, often in earrings or pendants
Example
The elegant pearl drop earrings complemented her outfit perfectly.
Los elegantes pendientes de gota de perla complementaron su atuendo perfectamente.
C1 verb /ˈkælɪˌbreɪt/

calibrate

calibrar
Meaning
To adjust or mark something so it can be used accurately; to standardize.
Example
The technician calibrated the machine before starting the experiment.
El técnico calibró la máquina antes de comenzar el experimento.
C1 noun /lʌmp/

Lump

bulto; trozo; pedazo
Meaning
a compact mass of a substance, especially one without a definite or regular shape
Example
She found a lump of sugar in the bowl.
Ella encontró un trozo de azúcar en el tazón.
C1 verb ɪˈnɪʃɪeɪtɪd

initiated

iniciado
Meaning
Caused a process or action to begin; started something.
Example
The project was initiated to enhance marine biodiversity.
El proyecto fue iniciado para mejorar la biodiversidad marina.
C1 noun /ˈpɑːrtʃmənt/

parchment

pergamino
Meaning
a thin material made from animal skin, used in the past for writing
Example
The ancient manuscript was written on parchment.
El antiguo manuscrito fue escrito en pergamino.
C1 adjective /ˌɪnkəʊˈhɪərənt/

incoherent

incoherente
Meaning
Not clear or easy to understand; lacking logical connection.
Example
His explanation was so incoherent that nobody could follow it.
Su explicación era tan incoherente que nadie pudo seguirla.
C1 verb /dɪsˈkwɑːlɪfaɪ/

disqualify

descalificar
Meaning
to officially prevent someone from participating or being eligible
Example
The referee decided to disqualify the player for cheating.
El árbitro decidió descalificar al jugador por hacer trampa.
C1 adjective /ˈnɔːʃəs/

nauseous

sentirse como si estuvieras a punto de vomitar
Meaning
feeling like you are about to vomit; causing a feeling of sickness
Example
The smell of rotten food made her feel nauseous.
El olor a comida en descomposición le hizo sentir como si fuera a vomitar.
C1 noun /ɡəˈrɪlə/

guerrilla

guerrillero
Meaning
a member of a small independent group taking part in irregular fighting, typically against larger forces
Example
The guerrilla fighters used ambushes to attack enemy positions.
Los combatientes guerrilleros usaron emboscadas para atacar las posiciones enemigas.
C1 adjective prɪˈkeə.ri.əs

precarious

peligroso
Meaning
Not securely held or in position; dependent on chance; uncertain.
Example
His financial situation is precarious.
Su situación financiera es peligrosa.
C1 noun ˌɪnfrəˈstrʌktʃərəl dɪˈveləpmənt

infrastructural development

desarrollo infraestructural
Meaning
The process of building and improving the basic physical and organizational structures and facilities needed for the operation of a society or enterprise.
Example
Infrastructural development is necessary for efficient recycling.
El desarrollo infraestructural es necesario para el reciclaje eficiente.
C1 verb /ɪnˈtaɪs/

entice

atraer
Meaning
to attract or tempt someone by offering something appealing
Example
The advertisement was designed to entice customers into the store.
El anuncio fue diseñado para atraer a los clientes a la tienda.
C1 noun /ˈbærɪstər/

barrister

abogado
Meaning
A type of lawyer in certain legal systems who specializes in courtroom advocacy and litigation.
Example
The barrister argued the case passionately before the judge.
El abogado defendió el caso con pasión ante el juez.
C1 adjective /ɪˈniː.bri.eɪ.tɪd/

inebriated

ebrio
Meaning
under the influence of alcohol; drunk
Example
He stumbled into the room completely inebriated.
Entró en la habitación completamente ebrio.
C1 verb /flɑp/

flop

fracaso
Meaning
to fall or move heavily and clumsily; to fail completely
Example
The new movie flopped at the box office.
La nueva película fracasó en la taquilla.
C1 verb /əˈliː.vi.eɪt/

alleviate

aliviar o mitigar
Meaning
To make suffering, deficiency, or a problem less severe; to relieve or ease.
Example
Meditation can alleviate stress and improve focus.
La meditación puede aliviar el estrés y mejorar el enfoque.
C1 adjective /ˌʌnkɒnstɪˈtuːʃənəl/

Unconstitutional

inconstitucional
Meaning
not in accordance with a political constitution; violating constitutional principles
Example
The court declared the new law unconstitutional.
El tribunal declaró que la nueva ley era inconstitucional.
C1 noun /ˈdɛmənˌstreɪtər/

demonstrator

demostrador, manifestante
Meaning
a person who shows how something works or takes part in a public protest
Example
The demonstrators marched peacefully through the city streets.
Los manifestantes marcharon pacíficamente por las calles de la ciudad.
C1 noun /ˈliːweɪ/

leeway

margen
Meaning
Freedom to act within certain limits; extra space or time.
Example
The manager gave the team some leeway to finish the project.
El gerente le dio al equipo algo de margen para terminar el proyecto.
C1 noun/verb /dɪsˈdeɪn/

disdain

desdén
Meaning
The feeling that someone or something is unworthy of respect; to regard with contempt.
Example
She looked at the messy room with open disdain.
Ella miró la habitación desordenada con desprecio.
C1 noun /ˈleɪ.tən.si/

latency

latencia
Meaning
The delay in processing signals or data.
Example
High latency in online gaming can cause lagging issues.
La alta latencia en los juegos en línea puede causar problemas de retraso.
C1 noun/verb /rɪˈproʊtʃ/

reproach

reproche / crítica
Meaning
An expression of disapproval or disappointment; to criticize someone for doing wrong.
Example
She reproached him for arriving late to the meeting.
Ella le reprochó por llegar tarde a la reunión.
C1 adjective ˌsʌbˈlɪm.ɪ.nəl

subliminal

existente o que opera por debajo del umbral de conciencia, percibido o que afecta la mente de alguien sin que lo sepa
Meaning
Existing or operating below the threshold of consciousness; perceived by or affecting someone's mind without their being aware of it.
Example
Advertisements often have subliminal messages.
Los anuncios a menudo contienen mensajes subliminales.
C1 verb /trænˈskraɪb/

transcribe

transcribir
Meaning
to make a written copy of spoken words or notes
Example
The secretary transcribed the meeting minutes.
La secretaria transcribió las actas de la reunión.
C1 verb ˌæs.ɚˈteɪn

ascertain

verificar
Meaning
To find out or discover something with certainty; to verify.
Example
The police tried to ascertain the cause of the accident.
La policía intentó verificar la causa del accidente.
C1 noun /ˈek.stə.si/

Ecstasy

éxtasis
Meaning
an overwhelming feeling of great happiness or joyful excitement
Example
She was in complete ecstasy when she heard the good news.
Ella estaba en completa éxtasis cuando escuchó las buenas noticias.
C1 noun /ˌæntɪˈsiːdənt/

antecedent

antecedente
Meaning
something that came before; a previous event, condition, or cause
Example
The cultural antecedents of this festival go back centuries.
Los antecedentes culturales de este festival datan de siglos atrás.
C1 verb /ˈpleɪdʒəraɪz/

plagiarize

plagiar
Meaning
to take someone else's work or ideas and present them as your own
Example
He was warned not to plagiarize his friend's essay.
Se le advirtió que no plagiara el ensayo de su amigo.
C1 noun /fəˌsɪlɪˈteɪʃən/

facilitation

facilitación
Meaning
The action of facilitating or making an action or process easier or helping bring about an outcome.
Example
Her facilitation made the meeting run smoothly.
Su facilitación hizo que la reunión fuera fluida.
C1 noun /ˈpɛndjələm/

pendulum

péndulo
Meaning
A weight suspended from a pivot so that it swings freely, often used to regulate clocks.
Example
The pendulum swung back and forth inside the clock.
El péndulo oscilaba hacia adelante y hacia atrás dentro del reloj.
C1 noun ˌkɒm.pjʊˈteɪ.ʃən

computation

cálculo
Meaning
The action of mathematical calculation.
Example
Complex computation is required for AI models.
Se requiere un cálculo complejo para los modelos de IA.
C1 noun /ˈbroʊkərɪdʒ/

brokerage

corretaje
Meaning
A firm that acts as an intermediary between buyers and sellers, often charging a fee.
Example
The real estate brokerage helped them find a new home.
La correduría inmobiliaria les ayudó a encontrar una nueva casa.
C1 adjective /ɪmˈpɛn.ɪ.trə.bəl/

impenetrable

impenetrable
Meaning
Impossible to pass through or enter; impossible to understand.
Example
The dense forest was nearly impenetrable.
El bosque denso era casi impenetrable.
C1 noun /brɛdθ/

breadth

anchura
Meaning
The distance or measurement from side to side; width; a wide range.
Example
The breadth of his knowledge impressed everyone.
La anchura de su conocimiento impresionó a todos.
C1 noun ˈmɑːrdʒɪnəlaɪzd ˌɪndɪˈvɪdʒuəlz

marginalized individuals

individuos marginados
Meaning
People who are treated as insignificant or peripheral to society, often excluded from mainstream social, economic, or political activities.
Example
Marginalized individuals often face severe challenges.
Los individuos marginados a menudo enfrentan desafíos graves.
C1 verb /ˌriːˈsiːt/

reseat

reubicar
Meaning
to seat someone again or to fit something back into its place
Example
The usher had to reseat the guests after the interruption.
El acomodador tuvo que reubicar a los invitados después de la interrupción.
C1 adjective ˌɪdiəsɪnˈkrætɪk

idiosyncratic

peculiar e individual
Meaning
Relating to idiosyncrasy; peculiar or individual.
Example
His idiosyncratic behavior set him apart from his colleagues.
Su comportamiento idiosincrático lo diferenciaba de sus compañeros.
C1 adjective ɔːˈspɪʃ.əs

auspicious

auspicioso
Meaning
Favorable or bringing good luck and success
Example
The wedding was held on an auspicious day.
La boda se celebró en un día auspicioso.
C1 noun /ˈɡlɒs.ər.i/

Glossary

glosario
Meaning
an alphabetical list of terms in a particular domain of knowledge with explanations; a brief dictionary
Example
The textbook includes a helpful glossary at the end to define technical terms.
El libro de texto incluye un glosario útil al final para definir términos técnicos.
C1 noun /ˌɛksɪˈkjuːʃənər/

executioner

verdugo
Meaning
A person who carries out a death sentence by execution.
Example
The executioner prepared the gallows for the condemned prisoner.
El verdugo preparó la horca para el prisionero condenado.
C1 verb /əˈtɛst/

attest

atestiguar
Meaning
To provide or serve as clear evidence of; to confirm or certify the truth of something.
Example
The witness attested to the accuracy of the report.
El testigo atestiguó la exactitud del informe.
C1 noun/verb /ˈɪnsɛns/

incense

incienso / enfurecer
Meaning
a substance burned for its sweet smell (noun); to make very angry (verb)
Example
The smell of incense filled the temple, but his rude words incensed her.
El olor del incienso llenó el templo, pero sus palabras groseras la enfurecieron.
C1 adjective /ˈfaɪə.ri/

Fiery

ardiente; apasionado; temperamental
Meaning
burning; passionate; hot-tempered; showing strong emotion
Example
She has a fiery temper that flares up quickly.
Ella tiene un temperamento ardiente que se enciende rápidamente.
C1 adjective /ˈdæʃ.ɪŋ/

Dashing

elegante; atractivo; audaz;
Meaning
stylish and confident; lively and energetic; attractive and charming
Example
He looked dashing in his new suit.
Él se veía elegante con su traje nuevo.
C1 adjective /ɪkˈskruːʃieɪtɪŋ/

excruciating

excruciante
Meaning
causing extreme physical or mental pain
Example
She was in excruciating pain after the accident.
Ella estaba en dolor insoportable después del accidente.
C1 verb /səbˈstænʃieɪt/

substantiate

substanciar
Meaning
To provide evidence to support or prove the truth of something.
Example
The lawyer worked to substantiate the claims with solid evidence.
El abogado trabajó para substanciar las reclamaciones con pruebas sólidas.
C1 verb /diːˈkoʊd/

decode

decodificar
Meaning
to convert a coded message into a readable form; to interpret meaning
Example
The software can decode the hidden message within seconds.
El software puede decodificar el mensaje oculto en segundos.
C1 verb /dɪˈstɪl/

distill

destilar
Meaning
To purify a liquid by heating and cooling; to extract the essential meaning or most important aspects.
Example
The factory distills water to make it safe for drinking.
La fábrica destila agua para hacerla segura para beber.
C1 verb /kriːk/

creak

hacer un ruido chirriante o agudo
Meaning
to make a high-pitched, squeaking noise when moved
Example
The old door creaked as she opened it.
La puerta vieja crujió cuando la abrió.
C1 verb /əˈseɪl/

assail

atacar
Meaning
to attack violently, either physically or with words
Example
The politician was assailed with difficult questions.
El político fue asaltado con preguntas difíciles.
C1 noun dɪˈspær.ə.ti

disparity

disparidad
Meaning
A great difference or inequality.
Example
Disparity between countries must be reduced.
La disparidad entre los países debe ser reducida.
C1 adjective /ɛnˌsaɪkləˈpiːdɪk/

encyclopedic

enciclopédico
Meaning
Having comprehensive knowledge of many subjects; relating to or characteristic of an encyclopedia.
Example
Her encyclopedic knowledge of history amazed everyone at the conference.
Su conocimiento enciclopédico de la historia sorprendió a todos en la conferencia.
C1 noun ˈhaɪ.drə.dʒən ˈpaʊ.əd bʌsɪz

hydrogen-powered buses

autobuses impulsados por hidrógeno
Meaning
Buses powered by hydrogen fuel cells that produce only water vapor as emission.
Example
Hydrogen-powered buses reduce air pollution.
Los autobuses impulsados por hidrógeno reducen la contaminación del aire.
C1 noun ˌdɪdʒɪˈnɛəreɪʃən

degeneration

degeneración
Meaning
The process of decline or deterioration in structure or function.
Example
The degeneration of brain cells leads to cognitive decline.
La degeneración de las células cerebrales conduce a un deterioro cognitivo.
C1 adjective /ˈwoʊ.fəl/

woeful

lamentable
Meaning
full of woe; very sad or miserable; also used to mean very bad or deplorable
Example
He gave me a woeful look when he lost the match.
Me dio una mirada lamentable cuando perdió el partido.
C1 noun /ˈrɛtʃɪdnəs/

wretchedness

miseria
Meaning
a state of misery, unhappiness, or poor condition
Example
The novel depicts the wretchedness of war victims.
La novela muestra la miseria de las víctimas de la guerra.
C1 noun /ˈsɛmbləns/

Semblance

semblanza; apariencia
Meaning
the outward appearance or apparent form of something, especially when the reality is different
Example
There was only a semblance of order in the chaotic office.
Solo había una semblanza de orden en la oficina caótica
C1 verb /ˈstɪɡmətaɪz/

stigmatize

estigmatizar
Meaning
to describe or regard someone as worthy of disgrace or disapproval
Example
People with certain illnesses are often unfairly stigmatized.
Las personas con ciertas enfermedades a menudo son estigmatizadas de manera injusta.
C1 noun /bəˈrɑːʒ/

barrage

barrida o ataque rápido
Meaning
a concentrated outpouring of questions, criticisms, or blows; a rapid, continuous attack
Example
The politician faced a barrage of tough questions from reporters.
El político enfrentó una avalancha de preguntas difíciles de los reporteros.
C1 noun /ˈfjuː.dʒə.tɪv/

Fugitive

fugitivo
Meaning
a person who has escaped from a place or is in hiding, especially to avoid arrest
Example
The police launched a manhunt to capture the fugitive who escaped from prison.
La policía lanzó una búsqueda para capturar al fugitivo que escapó de la prisión.
C1 noun məˈnjʊər

manure

estiércol, abono orgánico
Meaning
Animal dung used for fertilizing land; organic matter used as fertilizer.
Example
Organic manure enhances soil fertility.
El estiércol orgánico mejora la fertilidad del suelo.
C1 verb /ˈprɪkəl/

prickle

hormiguear
Meaning
to cause a slight stinging or tingling sensation on the skin
Example
Her skin began to prickle in the cold wind.
Su piel comenzó a hormiguear con el viento frío.
C1 verb /kənˈstrɪkt/

constrict

contraer
Meaning
to make narrower or tighter; to shrink or compress
Example
The snake constricted its prey before swallowing.
La serpiente contrajo a su presa antes de tragarla.
C1 noun kəˈmɑːnd ɪˈkɒn.ə.mi

command economy

economía planificada
Meaning
An economic system where economic activities are controlled by the government.
Example
In a command economy, the government controls production and prices.
En una economía planificada, el gobierno controla la producción y los precios.
C1 noun/verb /pɔːr/

pore

poros / estudiar cuidadosamente
Meaning
As a noun: a tiny opening in the skin or surface. As a verb: to study something carefully.
Example
She pored over the documents for hours before making a decision.
Ella estudió los documentos durante horas antes de tomar una decisión.
C1 noun, verb, adjective /ˈæɡ.rɪ.ɡət/ (noun/adjective), /ˈæɡ.rɪ.ɡeɪt/ (verb)

aggregate

agregado, conjunto
Meaning
A whole formed by combining several elements; to combine into a total.
Example
The data was aggregated to provide a clearer picture of the market.
Los datos fueron agregados para proporcionar una imagen más clara del mercado.
C1 verb /rɪˈpiːl/

repeal

derogar
Meaning
To officially cancel or revoke a law or decision.
Example
The government decided to repeal the outdated law.
El gobierno decidió derogar la ley obsoleta.
C1 noun /ˈflɔː.rə/

flora

la vida vegetal encontrada en una región o hábitat particular
Meaning
The plant life found in a particular region or habitat.
Example
The Amazon rainforest is home to a vast flora diversity.
La selva amazónica es hogar de una gran diversidad de flora.
C1 noun /ˈoʊvərˌtʊr/

overture

overture / propuesta
Meaning
An introduction to something more substantial; a proposal or preliminary action.
Example
The peace overture was welcomed by both nations.
La propuesta de paz fue bienvenida por ambas naciones.
C1 noun /krəˈnɒlədʒi/

chronology

cronología
Meaning
The arrangement of events or dates in the order of their occurrence.
Example
The chronology of the dynasty was carefully studied by historians.
La cronología de la dinastía fue cuidadosamente estudiada por los historiadores.
C1 adjective /ˈstrætɪfaɪd/

stratified

estratificado
Meaning
arranged or classified in layers or strata
Example
Society in the past was highly stratified based on class and wealth.
La sociedad en el pasado estaba altamente estratificada según la clase y la riqueza.
C1 noun /blɒˈkeɪd/

Blockade

bloqueo
Meaning
an act or means of sealing off a place to prevent goods or people from entering or leaving
Example
The naval blockade prevented supplies from reaching the port.
El bloqueo naval impidió que los suministros llegaran al puerto.
C1 verb /əˈtjuːn/

attune

sintonizar
Meaning
to make someone or something aware of or responsive to something; to adjust or harmonize
Example
She quickly attuned herself to the needs of her new team.
Ella se sintonizó rápidamente con las necesidades de su nuevo equipo.
C1 noun /ˈspɪnstər/

spinster

soltera
Meaning
An unmarried woman, often one who is older and considered unlikely to marry
Example
The novel featured a kind-hearted spinster who cared for the village children.
La novela presentó a una soltera de buen corazón que cuidaba a los niños del pueblo.
C1 noun ˌvɒl.əˈtɪl.ɪ.ti

volatility

volatilidad
Meaning
Liability to change rapidly and unpredictably, especially for the worse; instability.
Example
The stock market's volatility makes investment risky.
La volatilidad del mercado de valores hace que la inversión sea arriesgada.
C1 noun /ˈvɜːrtɪˌɡoʊ/

vertigo

felicidad
Meaning
A sensation of spinning or dizziness, often caused by problems in the inner ear or brain.
Example
She felt a sudden vertigo when she looked down from the tall building.
Ella no pudo ocultar su felicidad cuando recibió el premio.
C1 verb, noun /ɡɔːrdʒ/

gorge

comer con avidez / valle estrecho entre montañas
Meaning
to eat greedily; a narrow valley between mountains or hills
Example
They gorged themselves on pizza after the hike.
Ellos se atiborraron de pizza después de la caminata.
C1 adjective ˈwɛðərpruːf

weatherproof

resistente a la intemperie
Meaning
Able to resist or be unaffected by weather, especially rain and wind.
Example
The materials used are weatherproof, ensuring longevity.
Los materiales utilizados son resistentes a la intemperie, asegurando longevidad.
C1 adjective /ˈvendʒ.fəl/

Vengeful

vengativo
Meaning
seeking to harm someone in return for a perceived injury; vindictive
Example
She felt vengeful after her friend betrayed her trust.
Ella se sintió vengativa después de que su amiga traicionó su confianza.
C1 verb /ˈsaɪdˌstɛp/

sidestep

eludir
Meaning
To avoid something by stepping aside; to evade a problem or question indirectly.
Example
The politician tried to sidestep the difficult question.
El político intentó eludir la difícil pregunta.
C1 noun moʊst ˈvʌlnərəbəl ˈneɪʃən

most vulnerable nation

nación más vulnerable
Meaning
A country that is highly exposed to risks and lacks adequate protection or resilience.
Example
Bangladesh is one of the most vulnerable nations to climate change.
Bangladesh es uno de los países más vulnerables al cambio climático.
C1 adjective /ʌnˈskeɪðd/

unscathed

ileso
Meaning
Without suffering any injury, damage, or harm.
Example
She escaped from the accident unscathed.
Ella escapó del accidente ilesa.
C1 noun /ˌɪməˈtjʊərəti/

immaturity

inmadurez
Meaning
the state of not being fully developed emotionally, mentally, or physically; lack of maturity
Example
His immaturity made it difficult for him to handle responsibility.
Su inmadurez le dificultó manejar la responsabilidad.
C1 verb /kəˈmɛmɔˌreɪt/

commemorate

conmemorar
Meaning
To honor and remember someone or something through a ceremony or action.
Example
The statue was built to commemorate the fallen heroes.
La estatua fue construida para conmemorar a los héroes caídos.
C1 noun /ɪnˈdɪrmənt/

endearment

palabra cariñosa
Meaning
A word or phrase expressing affection or love.
Example
She whispered a gentle endearment to her child.
Ella susurró una palabra cariñosa a su hijo.
C1 noun /ˈdel.ɪ.kə.si/

Delicacy

delicadeza; un alimento delicado o costoso;
Meaning
fineness of texture or structure; a choice or expensive food; sensitivity in handling
Example
The chef prepared a local delicacy that was famous throughout the region.
El chef preparó una delicadeza local que era famosa en toda la región.
C1 noun /ˌpɜːrspəˈreɪʃn/

perspiration

transpiración
Meaning
The process of sweating.
Example
Heavy exercise causes perspiration.
El ejercicio pesado causa transpiración.
C1 adjective /ɪmˈfæt.ɪk/

Emphatic

enérgico; fuerte; expresado con fuerza y convicción
Meaning
forceful; strong; showing emphasis; expressed with force and conviction
Example
She gave an emphatic 'no' to the proposal.
Ella dio un 'no' enfático a la propuesta.
C1 noun /ˈprɒmɪnəns/

prominence

prominencia
Meaning
The state of being important, famous, or easily noticed.
Example
Her work gained prominence after the award.
Su trabajo ganó prominencia después del premio.
C1 adjective /ˈsɛptɪk/

septic

infectado
Meaning
Infected with harmful bacteria; relating to or causing infection.
Example
The doctor treated the patient's septic wound immediately.
El doctor trató la herida séptica del paciente de inmediato.
C1 noun /ˈɒf.sprɪŋ/

offspring

descendencia
Meaning
a person's child or children; an animal's young
Example
The bird carefully fed its offspring.
El pájaro alimentó cuidadosamente a su descendencia.
C1 noun /truːp/

troupe

grupo, compañía de teatro
Meaning
A group of dancers, actors, or performers who work together.
Example
The theater troupe performed brilliantly on stage.
La compañía de teatro actuó brillantemente en el escenario.
C1 noun /bəˈnæn.zə/

Bonanza

situación o evento que crea un aumento repentino en la riqueza, la buena suerte o las ganancias
Meaning
a situation or event that creates a sudden increase in wealth, good fortune, or profits
Example
The oil discovery was a bonanza for the small country.
El descubrimiento de petróleo fue una bonanza para el pequeño país.
C1 noun /ˈtɒpˌsɔɪl/

topsoil

capa superficial del suelo
Meaning
the top layer of soil, which is rich in organic matter and nutrients
Example
Farmers rely on healthy topsoil for good crop yields.
Los agricultores dependen de un suelo superficial saludable para obtener buenos rendimientos de cosecha.
C1 adjective, verb /sɪˈdeɪt/

sedate

sedar
Meaning
calm, quiet, and composed; or to administer a drug to make someone calm or sleep
Example
The nurse sedated the patient before the operation.
La enfermera sedó al paciente antes de la operación.
C1 noun səˈsteɪ.nə.bəl tekˈnɒl.ə.dʒi

sustainable technology

tecnología sostenible
Meaning
Technology designed to meet present needs without compromising future generations' ability to meet their needs.
Example
Sustainable technology ensures a cleaner future.
La tecnología sostenible garantiza un futuro más limpio.
C1 noun əˈrɪd.ɪ.ti

aridity

aridez
Meaning
The state of being extremely dry, especially having insufficient rainfall to support vegetation.
Example
The aridity of the land is increasing due to climate change.
La aridez de la tierra está aumentando debido al cambio climático.
C1 noun /ˌkɔr.diˈæl.ɪ.ti/

Cordiality

cordialidad; amabilidad
Meaning
sincere affection and kindness; warm and friendly behavior
Example
The host's cordiality made all the guests feel welcome and comfortable.
La cordialidad del anfitrión hizo que todos los invitados se sintieran bienvenidos y cómodos.
C1 noun /ˈpɑːrlər/

parlor

salón, tienda
Meaning
A sitting room in a private house, or a shop providing specified services.
Example
They welcomed the guests into the front parlor.
Recibieron a los invitados en el salón principal.
C1 noun, verb /səˈpiːnə/

subpoena

citación judicial
Meaning
a legal document ordering someone to attend court; to summon someone with such a document
Example
The witness received a subpoena to appear in court next week.
El testigo recibió una citación judicial para comparecer en la corte la próxima semana.
C1 adjective /ˈædʒɪteɪtɪd/

Agitated

agitado; inquieto; nervioso; excitado de manera negativa
Meaning
disturbed; anxious; restless; excited in a negative way
Example
He became agitated when he heard the bad news.
Se agitou cuando escuchó las malas noticias.
C1 noun /ˈstoʊəˌweɪ/

stowaway

polizón
Meaning
A person who hides on a ship, plane, or other vehicle in order to travel secretly without paying.
Example
The crew discovered a stowaway hiding in the cargo hold.
La tripulación descubrió un polizón escondido en el compartimento de carga.
C1 noun /ˈmæk.ər.əl/

Mackerel

caballa
Meaning
a streamlined marine fish with a forked tail and wavy stripes
Example
Mackerel is rich in omega-3 fatty acids.
La caballa es rica en ácidos grasos omega-3.
C1 adjective /ʌnˈmaɪndfəl/

Unmindful

despreocupado; descuidado;
Meaning
not paying attention; careless; heedless
Example
She was unmindful of the danger around her.
Ella no prestaba atención al peligro a su alrededor.
C1 noun /ˈprɒk.tər/

proctor

examinador
Meaning
a person who supervises students during an examination
Example
The proctor reminded students to keep their phones switched off.
El proctor recordó a los estudiantes mantener sus teléfonos apagados.
C1 noun ˌɒb.səˈlɛs.əns

obsolescence

obsolescencia
Meaning
The process of becoming obsolete or outdated and no longer used.
Example
The rapid advancement of technology leads to the obsolescence of old devices.
El rápido avance de la tecnología provoca la obsolescencia de los dispositivos antiguos.
C1 noun /ˈneɪ.vəl/

Navel

ombligo
Meaning
the small hollow in the center of the stomach where the umbilical cord was attached
Example
The baby's navel cord fell off after a week.
El cordón umbilical del bebé se cayó después de una semana.
C1 adjective /ˌwɛlˈbrɛd/

well-bred

bien educado
Meaning
Having or showing good manners; properly raised.
Example
She is a well-bred young lady with excellent manners.
Ella es una joven bien educada con excelentes modales.
C1 noun ˌnæn.oʊ.tekˈnɒl.ə.dʒi

nanotechnology

nanotecnología
Meaning
The branch of technology that deals with dimensions and tolerances of less than 100 nanometers.
Example
Nanotechnology is advancing medical treatments.
La nanotecnología está avanzando en los tratamientos médicos.
C1 noun /poʊˈɛt.ɪks/

poetics

poética, teoría de la poesía
Meaning
the study or theory of poetry and its principles
Example
He wrote a book on poetics explaining the art of verse.
Escribió un libro sobre poética explicando el arte del verso.
C1 noun /draɪ ˈtʃɪl.i/

Dry Chilli

pimiento seco
Meaning
dried chili peppers used as spice for adding heat to food
Example
The recipe calls for two dry chillies to make it spicy.
La receta requiere dos pimientos secos para hacerlo picante.
C1 noun /ˈpoʊdiətrɪst/

podiatrist

podólogo
Meaning
a doctor specializing in foot care
Example
I have an appointment with the podiatrist for my ankle pain.
Tengo una cita con el podólogo para el dolor de tobillo.
C1 noun ˈsʌs.tɪ.nəns

Sustenance

sustento o alimento
Meaning
Food or support necessary for sustaining life
Example
Water is essential for human sustenance.
El agua es esencial para la sustentación humana.
C1 noun /ˈtwɪstər/

twister

tornado
Meaning
A tornado or something that twists; also refers to a challenging tongue twister.
Example
The twister destroyed several houses in the village.
El tornado destruyó varias casas en el pueblo.
C1 noun /ˈɑːlɪˌɡɑːrki/

oligarchy

oligarquía
Meaning
A small group of people having control of a country, organization, or institution.
Example
The nation was ruled by a wealthy oligarchy that controlled all resources.
La nación fue gobernada por una oligarquía rica que controlaba todos los recursos.
C1 adjective /ˈluː.mɪ.nəs/

Luminous

luminoso; brillante; resplandeciente
Meaning
bright; shining; emitting light; radiant
Example
The luminous stars filled the dark night sky.
Las estrellas luminosas llenaron el cielo nocturno oscuro.