centrifuge
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C1 noun /ˈsɛntrɪˌfjuːdʒ/

centrifuge

centrífuga
Meaning
A machine that spins substances at high speed to separate different components.
Example
The lab technician used a centrifuge to separate the blood cells from the plasma.
El técnico de laboratorio usó una centrífuga para separar las células sanguíneas del plasma.
C1 noun /ˈæbdəmən/

abdomen

abdomen
Meaning
The part of the body below the chest and above the hips that contains the stomach and other organs.
Example
He complained of pain in his abdomen.
Él se quejó de dolor en su abdomen.
C1 noun ˌiː.kəʊˈfrend.li ˌɜː.bən.aɪˈzeɪ.ʃən

eco-friendly urbanization

urbanización ecológica
Meaning
The development of cities in a way that is not harmful to the environment.
Example
Eco-friendly urbanization reduces environmental degradation.
La urbanización ecológica reduce la degradación ambiental.
C1 noun /maɪt/

mite

ácaro
Meaning
a very small creature, often a tiny arachnid; also used to mean a very small amount
Example
The mattress was infested with dust mites.
El colchón estaba infestado de ácaros del polvo.
C1 noun /pɪˈtaɪə/

Pitaya / Dragon fruit

fruta del dragón
Meaning
a tropical fruit with bright pink or red skin and white flesh speckled with black seeds
Example
The pitaya has a mild, sweet flavor and a unique appearance.
La pitaya tiene un sabor suave y dulce y una apariencia única.
C1 noun /braɪn/

brine

agua salada
Meaning
Water saturated with salt, often used for preserving food.
Example
The olives were stored in brine to keep them fresh.
Las aceitunas se guardaron en agua salada para mantenerlas frescas.
C1 adjective /ˈrek.wɪ.zɪt/

Requisite

requisito; necesario
Meaning
made necessary by particular circumstances; required
Example
Good communication skills are requisite for this job.
Las habilidades de comunicación son requisito para este trabajo.
C1 noun/verb /fliːs/

fleece

lana de oveja
Meaning
The woolly covering of a sheep; as a verb, to swindle or cheat someone.
Example
The farmer sheared the sheep’s fleece carefully.
El granjero esquiló el vellón de la oveja cuidadosamente.
C1 adjective ˌhaɪ.pəˈθet.ɪ.kəl

hypothetical

hipotético, supuesto, teórico
Meaning
Based on or serving as a hypothesis; supposed but not necessarily real or true.
Example
The discussion was based on hypothetical scenarios.
La discusión se basó en escenarios hipotéticos.
C1 adjective /ˌɪlɪˈdʒɪtɪmət/

illegitimate

ilegítimo
Meaning
Not authorized by law, rules, or standards; not recognized as valid.
Example
The court ruled the contract to be illegitimate.
El tribunal dictaminó que el contrato era ilegítimo.
C1 noun /dɪˈfjuːʒən/

diffusion

difusión
Meaning
the spreading of something more widely or the movement of particles from high to low concentration
Example
The diffusion of information on social media is rapid.
La difusión de información en las redes sociales es rápida.
C1 noun /ˌtrænsˈpɪəreɪʃən/

transpiration

transpiración
Meaning
The process by which plants lose water through their leaves, which plays a crucial role in plant cooling, nutrient transport, and the water cycle.
Example
Transpiration plays a key role in the water cycle and plant growth.
La transpiración juega un papel clave en el ciclo del agua y el crecimiento de las plantas.
C1 noun /ˌluː.mɪˈnɒs.ɪ.ti/

luminosity

luminosidad
Meaning
The intrinsic brightness of a celestial object; the quality of emitting light.
Example
The luminosity of the star was measured with advanced instruments.
La luminosidad de la estrella se midió con instrumentos avanzados.
C1 adjective əˈblɪv.i.əs

oblivious

despreocupado
Meaning
Being completely unaware of surrounding events.
Example
He was oblivious to the noise around him while reading.
Él no se dio cuenta del ruido a su alrededor mientras leía.
C1 verb /lætʃ/

latch

cerrar con pestillo
Meaning
to fasten or close something with a latch
Example
She latched the door before leaving the house.
Ella cerró la puerta con el pestillo antes de salir de la casa.
C1 adjective /pəˈnɪnsjələr/

peninsular

peninsular
Meaning
Relating to or resembling a peninsula.
Example
The peninsular region is surrounded by water on three sides.
La región peninsular está rodeada de agua por tres lados.
C1 noun /ˌkʌl də ˈsæk/

cul de sac

calle sin salida
Meaning
A street or passage closed at one end; a dead end.
Example
They bought a house at the end of a quiet cul de sac.
Compraron una casa al final de una tranquila calle sin salida.
C1 adjective /ˈveɪɡrənt/

Vagrant

vagabundo; sin hogar
Meaning
wandering aimlessly; having no settled home
Example
The vagrant man was asking for food near the station.
El hombre vagabundo estaba pidiendo comida cerca de la estación.
C1 noun /rɪˈpreʃən/

Repression

represión
Meaning
the action of subduing someone or something by force; the restraint, prevention, or inhibition of a feeling, impulse, etc.
Example
The government's repression of free speech sparked widespread protests.
La represión del gobierno contra la libertad de expresión provocó protestas generalizadas.
C1 adjective /ˈtɪərfəl/

Tearful

lloroso; inclinado a llorar
Meaning
expressing or showing sadness and sorrow; inclined to weep
Example
She gave a tearful goodbye to her friends at the airport.
Ella dio una despedida llorosa a sus amigos en el aeropuerto.
C1 adjective /əˈfɜːrmətɪv/

affirmative

afirmativo
Meaning
expressing agreement, approval, or a positive response
Example
She gave an affirmative answer to the proposal.
Ella dio una respuesta afirmativa a la propuesta.
C1 noun /ˈrʌp.tʃər/

Rupture

ruptura; quiebre de relaciones
Meaning
breaking or bursting apart; breakdown of relations
Example
The rupture in the pipeline caused a massive oil spill.
La ruptura en la tubería causó un gran derrame de petróleo.
C1 noun ɪˌræd.ɪˈkeɪ.ʃən

eradication

erradicación
Meaning
The complete destruction or elimination of something unwanted.
Example
Carbon eradication is a key goal of the project.
La erradicación del carbono es una meta clave del proyecto.
C1 noun /trʌsˈtiː/

trustee

fideicomisario
Meaning
a person who holds or manages property or assets for the benefit of others
Example
She was appointed as the trustee of the family estate.
Ella fue nombrada fideicomisaria de la propiedad familiar.
C1 adjective /ˈɡɔːri/

gory

sangriento
Meaning
involving or showing a lot of bloodshed and violence
Example
The movie was too gory for children.
La película fue demasiado sangrienta para los niños.
C1 adjective ˈɒptɪmaɪzd

optimized

optimizados, mejorado, más eficiente
Meaning
Made as fully perfect, functional, or effective as possible; improved to achieve maximum efficiency.
Example
The system has been optimized for faster performance.
El sistema ha sido optimizado para un rendimiento más rápido.
C1 verb /kənˈkɒkt/

concoct

crear o inventar
Meaning
to make something, especially food or a story, by mixing or inventing
Example
He concocted a story to explain his absence.
Él inventó una historia para explicar su ausencia.
C1 adjective /ˈbær.ən/

Barren

árido; estéril; desolado; improductivo
Meaning
sterile; unable to produce; desolate; unproductive
Example
The barren desert stretched for miles without any vegetation.
El desierto árido se extendía por millas sin vegetación.
C1 verb /ˈɛm.ə.neɪt/

emanate

emanar
Meaning
To come out or spread from a source.
Example
A sweet fragrance emanated from the garden.
Una dulce fragancia emanó del jardín.
C1 adjective /ʌnˈsteɪtɪd/

unstated

no expresado
Meaning
not expressed directly in words; implied or left unsaid
Example
The contract included several unstated expectations.
El contrato incluía varias expectativas no expresadas.
C1 noun /ˌdɪspəˈzɪʃən/

disposition

disposición
Meaning
A person's usual attitude or temperament; arrangement or tendency.
Example
She has a cheerful disposition despite the difficulties.
Ella tiene una disposición alegre a pesar de las dificultades.
C1 noun /ˈstɔːrhaʊs/

storehouse

almacén
Meaning
A place where goods, supplies, or valuables are stored; a repository
Example
The warehouse acted as a storehouse for all the imported goods.
El almacén actuaba como un storehouse para todos los productos importados.
C1 adjective /ˌsækrəˈlɪdʒəs/

sacrilegious

sacrílego
Meaning
Showing disrespect or irreverence toward something sacred.
Example
The painting was criticized as being sacrilegious.
La pintura fue criticada por ser sacrílega.
C1 noun /əˈduː/

ado

alboroto / actividad innecesaria
Meaning
a fuss or unnecessary activity; trouble or difficulty
Example
Without further ado, let’s begin the ceremony.
Sin más alboroto, empecemos la ceremonia.
C1 noun /ˌkɑːr.diˈɒl.ə.dʒɪst/

cardiologist

cardiólogo
Meaning
A doctor specializing in diagnosing and treating heart diseases.
Example
She made an appointment with a cardiologist for her chest pain.
Ella hizo una cita con un cardiólogo debido al dolor en su pecho.
C1 adjective /ʌnˈkɛmpt/

unkempt

desordenado
Meaning
Having an untidy or disheveled appearance.
Example
He looked unkempt after sleeping outdoors all night.
Se veía desordenado después de dormir al aire libre toda la noche.
C1 adjective /ˌkɒndɪˈsɛndɪŋ/

condescending

condescendiente
Meaning
having or showing an attitude of patronizing superiority
Example
Her condescending tone upset her colleagues.
Su tono condescendiente molestó a sus compañeros.
C1 adjective /ˈærɪd/

arid

árido
Meaning
extremely dry; lacking in interest or excitement
Example
The desert is known for its arid climate.
El desierto es conocido por su clima árido.
C1 noun /ˈkɔːl.drən/

Cauldron

caldero
Meaning
a large metal pot with a lid and handle, used for cooking over a fire
Example
The witch stirred her potion in a large cauldron.
La bruja removió su poción en un gran caldero.
C1 adjective /ˈkjuːmjələtɪv/

cumulative

cumulativo
Meaning
Increasing gradually by addition; growing in quantity, force, or effect.
Example
The cumulative effect of stress can harm your health.
El efecto acumulativo del estrés puede dañar tu salud.
C1 verb /ˌæprɪˈhɛnd/

apprehend

detener
Meaning
to arrest or seize someone; to understand or perceive something
Example
The police managed to apprehend the thief after a long chase.
La policía logró apresar al ladrón después de una larga persecución.
C1 adjective /bɪˈriːvd/

Bereaved

afligido
Meaning
having lost a loved one through death
Example
The bereaved family received many condolences.
La familia afligida recibió muchas condolencias.
C1 noun /dɪˈsiːt/

Deceit

engaño; fraude; mentira
Meaning
the action or practice of deceiving someone by concealing or misrepresenting the truth
Example
His deceit was discovered when the truth about his qualifications came to light.
Su engaño fue descubierto cuando la verdad sobre sus calificaciones salió a la luz.
C1 noun /kənˈstɪtʃuənsi/

constituency

circunscripción
Meaning
A geographical area whose residents elect a representative to a legislative body.
Example
She campaigned tirelessly across her constituency.
Hizo campaña incansablemente por su circunscripción.
C1 verb /ˈpɪlfər/

pilfer

robar
Meaning
to steal things of small value or in small quantities
Example
The employee was caught pilfering office supplies.
El empleado fue atrapado robando suministros de oficina.
C1 noun ˈflɔː.rə ænd ˈfɔː.nə

flora and fauna

flora y fauna
Meaning
The plants and animals of a particular region, habitat, or geological period.
Example
The Galápagos Islands have unique flora and fauna.
Las Islas Galápagos tienen una flora y fauna únicas.
C1 noun ˈrɔɪəl ˈbɛŋɡəl ˈtaɪɡər

Royal Bengal Tiger

Tigre Real de Bengala
Meaning
A subspecies of tiger found primarily in India and Bangladesh, known for its distinctive orange coat with black stripes.
Example
The Royal Bengal Tiger is an iconic species of the Sundarbans.
El Tigre Real de Bengala es una especie icónica de los Sundarbans.
C1 verb /ɡleɪz/

glaze

cobrir
Meaning
to cover with a smooth, shiny surface; to coat with a glossy finish
Example
The chef glazed the cake with chocolate.
El chef cubrió el pastel con chocolate.
C1 noun /jiːld ˌɒptɪmaɪˈzeɪʃən/

yield optimization

optimización del rendimiento
Meaning
The process of maximizing the productivity or efficiency of crop production through various agricultural techniques and practices.
Example
Yield optimization techniques can significantly improve crop production.
Las técnicas de optimización del rendimiento pueden mejorar significativamente la producción de cultivos.
C1 verb /strʌt/

strut

caminar con arrogancia
Meaning
to walk with a stiff, proud, and confident gait, often to show off
Example
He strutted across the stage after winning the award.
Él caminó por el escenario después de ganar el premio.
C1 adjective /ˈkɒnvɛks/

convex

convexo, redondeado hacia afuera
Meaning
curved or rounded outward
Example
The lens has a convex shape to focus light.
La lente tiene una forma convexa para enfocar la luz.
C1 noun /ˌɪnkəmˈpliːtnəs/

incompleteness

incompletitud
Meaning
the state of not being complete or whole; lack of necessary parts or fullness
Example
The incompleteness of the report caused delays in the project.
La incompletitud del informe causó retrasos en el proyecto.
C1 adjective /əˈbliːk/

Oblique

oblicuo; diagonal; indirecto o evasivo
Meaning
slanting; diagonal; indirect or evasive
Example
The artist drew an oblique line across the canvas.
El artista dibujó una línea oblicua en el lienzo.
C1 adverb /ˌðɛrəˈbaʊt/

thereabout

aproximadamente
Meaning
Approximately or around that place, amount, or time.
Example
The repairs will cost five hundred dollars or thereabout.
Las reparaciones costarán quinientos dólares o alrededor de eso.
C1 noun /ˈwɪzərdri/

wizardry

destreza mágica
Meaning
The art or practice of magic; great skill or expertise in something.
Example
The programmer's wizardry amazed everyone in the room.
La destreza del programador asombró a todos en la sala.
C1 verb /diːˈfjuːz/

defuse

desactivar
Meaning
To make a situation less dangerous, tense, or explosive; to remove a fuse from a bomb.
Example
The negotiator helped defuse the tense situation.
El negociador ayudó a desactivar la situación tensa.
C1 adjective /ˈsæljʊˌtɛri/

salutary

saludable
Meaning
Producing good effects; beneficial, especially after something unpleasant.
Example
The accident was a salutary reminder to drive carefully.
El accidente fue un recordatorio saludable de conducir con cuidado.
C1 noun /əˈdʒɪl.ɪ.ti/

agility

agilidad
Meaning
Ability to work quickly and easily, both physically and mentally.
Example
Mental agility is essential for problem-solving.
La agilidad mental es esencial para resolver problemas.
C1 adjective /praɪˈmiːvəl/

primeval

primitivo
Meaning
Relating to the earliest ages in history; ancient and primitive.
Example
The explorers ventured into the primeval forest untouched by humans.
Los exploradores se adentraron en el bosque primitivo sin tocar por los humanos.
C1 noun /ˈwʊd.ən ˈsæn.dəl/

Wooden sandal

sandalia de madera
Meaning
a type of footwear made of wood, typically worn as traditional shoes
Example
She wore wooden sandals to the traditional ceremony.
Ella llevaba sandalias de madera en la ceremonia tradicional.
C1 adverb /ˈnæroʊli/

Narrowly

por un pequeño margen; apenas
Meaning
by a small margin; barely; in a limited way
Example
She narrowly escaped the accident.
Ella escapó por poco del accidente.
C1 noun /səˈvɪləti/

civility

cortesía
Meaning
Polite and courteous behavior.
Example
He treated his opponent with civility despite their differences.
Trató a su oponente con cortesía a pesar de sus diferencias.
C1 verb /ˈplʌm.ɪt/

plummet

caer verticalmente a alta velocidad
Meaning
to fall straight down at high speed
Example
Stock prices plummeted after the sudden market crash.
Los precios de las acciones cayeron repentinamente después del colapso del mercado.
C1 verb /mæʃ/

mash

machacar
Meaning
to crush or mix food into a soft mass, usually by pressing or beating
Example
She mashed the potatoes before serving dinner.
ella machó las papas antes de servir la cena.
C1 adjective, noun /ˈɪnvəlɪd/ (adjective), /ɪnˈvælɪd/ (noun)

invalid

inválido
Meaning
Not valid; having no force or effect. Also refers to a person too weak or ill to care for themselves.
Example
The court declared the contract invalid.
El tribunal declaró el contrato inválido.
C1 adjective /ˌfɑːrˈfɛtʃt/

far-fetched

increíble
Meaning
unlikely to happen or be true; improbable
Example
His explanation for being late was a bit far-fetched.
Su explicación por llegar tarde era un poco increíble.
C1 verb /ˈnɛsəl/

nestle

acurrucarse
Meaning
to settle or lie comfortably within or against something
Example
The child nestled into her mother's arms.
El niño se acurrucó en los brazos de su madre.
C1 adjective /ˈdrɪəri/

dreary

triste / sombrío
Meaning
dull, bleak, and lifeless; depressing
Example
The long, dreary winter made everyone feel gloomy.
El largo y sombrío invierno hizo que todos se sintieran tristes.
C1 adjective /ˈkrɪm.zən/

Crimson

rojo intenso
Meaning
a deep purplish-red color
Example
The crimson sunset painted the sky with beautiful shades.
La puesta de sol roja intensa pintó el cielo con hermosos tonos.
C1 noun /ˈæntlɚ/

antler

cuerno de ciervo
Meaning
The branched horns on the head of a deer or similar animal, usually shed and regrown annually.
Example
The deer’s antlers grew larger each year.
Los cuernos de ciervo crecían más grandes cada año.
C1 noun /ɪnˈdem.nə.ti/

Indemnity

indemnización
Meaning
security or protection against a loss or other financial burden; compensation for damage or loss
Example
The insurance company provided full indemnity for the damages caused by the flood.
La compañía de seguros proporcionó indemnización completa por los daños causados por la inundación.
C1 noun /ˈstəʊ.ɪ.sɪ.zəm/

stoicism

estoicismo
Meaning
The endurance of pain or hardship without the display of feelings and without complaint.
Example
His stoicism during hardship was admirable.
Su estoicismo durante la adversidad fue admirable.
C1 verb /ˌɪntərˈsɛpt/

intercept

interceptar
Meaning
to stop, catch, or seize something on its way from one place to another
Example
The police intercepted the stolen car before it crossed the border.
La policía interceptó el coche robado antes de que cruzara la frontera.
C1 adjective /ɪkˈsiːdɪŋ/

Exceeding

excesivo; más allá
Meaning
going beyond; surpassing; extremely
Example
The project was completed with exceeding excellence.
El proyecto se completó con una excelencia excesiva.
C1 verb /ʌnˈnɜːrv/

unnerve

perder la confianza
Meaning
to make someone lose confidence, courage, or composure
Example
The hostile questions began to unnerve the witness.
Las preguntas hostiles comenzaron a poner nervioso al testigo.
C1 adjective /ˈniːd.ləs/

Needless

innecesario
Meaning
unnecessary; not required; without purpose
Example
The argument was needless and could have been avoided.
La discusión fue innecesaria y podría haberse evitado.
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 /ˌæntɪˈsiːdənts/

antecedents

antecedentes
Meaning
previous events, conditions, or people that influence or serve as a basis for something that follows
Example
The lawyer examined the criminal antecedents of the suspect.
El abogado examinó los antecedentes criminales del sospechoso.
C1 adjective /ˌʌnɪmˈplɔɪəbəl/

unemployable

desempleable
Meaning
Not able to be employed; lacking the skills or qualities necessary for employment
Example
Due to his criminal record, he was considered unemployable in most companies.
Debido a su historial criminal, fue considerado desempleable en la mayoría de las empresas.
C1 noun /ˈpreɪsiː/

precis

resumen
Meaning
A concise summary of a text or speech.
Example
The student submitted a précis of the long article.
El estudiante entregó un resumen del largo artículo.
C1 noun /ˈkɒləmnɪst/

columnist

columnista
Meaning
a journalist who regularly writes articles or opinions for a newspaper or magazine
Example
The columnist wrote an article about climate change.
El columnista escribió un artículo sobre el cambio climático.
C1 adjective /əˈtrəʊ.ʃəs/

Atrocious

atroz; extremadamente malo o desagradable
Meaning
horrifyingly wicked; extremely bad or unpleasant
Example
The conditions in the prison were atrocious.
Las condiciones en la prisión eran atroces.
C1 adjective /ˈven.ə.məs/

Venomous

venenoso; malicioso;
Meaning
secreting venom; full of malice or spite; extremely hostile
Example
The venomous snake struck quickly at its prey.
La serpiente venenosa atacó rápidamente a su presa.
C1 adjective, verb /ɪɡˈzɛmpt/

exempt

exento
Meaning
Free from an obligation or liability imposed on others.
Example
Students with high grades are exempt from the final exam.
Los estudiantes con altas calificaciones están exentos del examen final.
C1 adjective /əˈblɪɡ.ə.tɔː.ri/

obligatory

obligatorio
Meaning
Required by a legal, moral, or other rule; compulsory.
Example
Wearing a seatbelt is obligatory in most countries.
Usar el cinturón de seguridad es obligatorio en la mayoría de los países.
C1 verb /tʃɑːr/

char

quemar
Meaning
To burn or scorch something so that it becomes blackened.
Example
The cook accidentally charred the steak.
El cocinero accidentalmente quemó el filete.
C1 adjective /ˌmaɪ.krəˈskɑː.pɪk/

microscopic

microscópico
Meaning
Extremely small and only visible with a microscope.
Example
The sample contained microscopic particles.
La muestra contenía partículas microscópicas.
C1 adjective /ɪˈlɒdʒ.ɪ.kəl/

Illogical

Ilógico
Meaning
not reasonable or sensible; lacking logic
Example
It would be illogical to go swimming in such cold weather.
Sería ilógico nadar en un clima tan frío.
C1 adjective ˈkrɪp.tɪk

cryptic

críptico, enigmático, ambiguo
Meaning
Having a meaning that is mysterious or obscure; difficult to understand.
Example
The message was cryptic and hard to decipher.
El mensaje era críptico y difícil de descifrar.
C1 noun /ˈsɛdətɪv/

sedative

sedante
Meaning
A substance that calms the nerves or induces sleep.
Example
The doctor prescribed a sedative to help the patient sleep.
El doctor recetó un sedante para ayudar al paciente a dormir.
C1 adjective /ˈweɪwərd/

wayward

rebelde
Meaning
Difficult to control or predict because of unusual or perverse behavior.
Example
The teacher struggled to manage the wayward students.
El maestro luchaba por manejar a los estudiantes rebeldes.
C1 verb /əˈbriːvieɪt/

abbreviate

abreviar
Meaning
To shorten a word, phrase, or text by leaving out letters or parts.
Example
We often abbreviate 'Doctor' to 'Dr'.
A menudo abreviamos 'Doctor' a 'Dr'.
C1 verb /prɪˈzaɪd/

preside

presidir
Meaning
to be in charge of a meeting, event, or organization
Example
She will preside over the meeting tomorrow.
Ella presidirá la reunión mañana.
C1 noun kənˈsɔː.ti.əm

consortium

consorcio
Meaning
An association of several companies or organizations formed to undertake an enterprise beyond the resources of any one member.
Example
The consortium worked collaboratively to build the cable.
El consorcio trabajó de manera colaborativa para construir el cable.
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 /ɑːrˈmɑːdə/

armada

flota de guerra
Meaning
A large fleet of warships.
Example
The Spanish Armada sailed against England in 1588.
La Armada Española navegó contra Inglaterra en 1588.
C1 noun /ˈskɛptɪk/

skeptic

escéptico
Meaning
A person who doubts or questions accepted beliefs or claims.
Example
The scientist was a skeptic of theories without solid evidence.
El científico era escéptico de las teorías sin evidencia sólida.
C1 noun /fiːt/

feat

hazaña
Meaning
an achievement that requires great courage, skill, or strength
Example
Climbing Mount Everest was a remarkable feat.
Escalar el monte Everest fue una hazaña notable.
C1 adjective /əˈnæl.ə.ɡəs/

analogous

análogo
Meaning
Comparable in certain respects, typically in a way that makes clearer the nature of things being compared.
Example
The human brain is analogous to a supercomputer.
El cerebro humano es análogo a una supercomputadora.
C1 verb /ˈkaʊər/

cower

agacharse por miedo
Meaning
to crouch down in fear
Example
The child cowered behind the sofa during the thunderstorm.
El niño se encogió detrás del sofá durante la tormenta.
C1 noun /ˌɑːsɪˈleɪʃən/

oscillation

oscilación
Meaning
The movement back and forth at a regular speed.
Example
The oscillation of the pendulum controls the clock.
La oscilación del péndulo controla el reloj.
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 /əbˈstrʌkʃən/

obstruction

obstáculo
Meaning
Something that blocks or gets in the way; the action of obstructing.
Example
There was an obstruction on the railway track.
Había un obstáculo en la vía del tren.
C1 noun /ˈsʌnˌdaʊn/

sundown

puesta de sol
Meaning
the time in the evening when the sun goes below the horizon
Example
We planned to reach the village before sundown.
Planeamos llegar al pueblo antes de la puesta de sol.
C1 verb /ɪnˈvælɪdeɪt/

invalidate

invalidar
Meaning
To make something not valid or legally acceptable.
Example
The new evidence may invalidate the previous ruling.
La nueva evidencia puede invalidar el fallo anterior.
C1 noun, verb /buːz/

booze

alcohol
Meaning
alcoholic drink, especially strong liquor; to drink alcohol, often excessively
Example
They bought some booze for the party.
Compraron alcohol para la fiesta.
C1 verb /əˈpɔːl/

appall

impactar
Meaning
To shock or horrify someone with something unpleasant or bad.
Example
The cruelty of the crime appalled the entire community.
La crueldad del crimen impactó a toda la comunidad.
C1 adjective ˌɜː.ɡəˈnɒm.ɪk

ergonomic

diseño ergonómico
Meaning
Designed for efficiency and comfort in the working environment; user-friendly and reducing strain.
Example
The chair has an ergonomic design for better posture.
La silla tiene un diseño ergonómico para una mejor postura.
C1 adjective /dɪˈlæpɪˌdeɪtɪd/

dilapidated

deteriorado
Meaning
Fallen into disrepair or ruin due to neglect or age.
Example
The family lived in a dilapidated house at the edge of town.
La familia vivía en una casa deteriorada al borde de la ciudad.
C1 adjective /ɒˈstɛnsəbl/

ostensible

aparente
Meaning
stated or appearing to be true, but not necessarily so
Example
His ostensible reason for leaving was illness, but many doubted it.
Su aparente razón para irse era la enfermedad, pero muchos lo dudaron.
C1 noun /ˈmɔːr.nər/

Mourner

persona que asiste a un funeral
Meaning
a person who attends a funeral or shows grief for someone who has died
Example
The mourners gathered at the cemetery to pay their respects.
Los dolientes se reunieron en el cementerio para rendir sus respetos.
C1 noun /hʌl/

hull

casco del barco / cáscara de semilla
Meaning
The outer covering of a seed or fruit; also the main body of a ship.
Example
The sailors inspected the ship’s hull for any damage.
Los marineros inspeccionaron el casco del barco para detectar daños.
C1 verb /ˈtræmpəl/

trample

pisotear
Meaning
to tread heavily on something and cause damage or injury
Example
The crowd trampled the flowers in the park.
La multitud pisoteó las flores en el parque.
C1 noun /ˈdʒɪŋ.ɡəl/

Jingle

un sonido metálico ligero, como el que hacen los objetos metálicos cuando se agitan; una canción corta y pegadiza
Meaning
a light ringing sound such as that made by metal objects being shaken together; a short catchy song
Example
The jingle of keys could be heard as she walked down the hallway.
El sonido de las llaves se podía escuchar mientras caminaba por el pasillo.
C1 adjective /ˈɪnfəməs/

infamous

infame
Meaning
well known for some bad quality or deed
Example
The dictator was infamous for his cruelty.
El dictador era infame por su crueldad.
C1 verb /ˈdiːmɑːrˌkeɪt/

demarcate

demarcar
Meaning
to set the boundaries or limits of something
Example
The land was demarcated with fences to avoid disputes.
La tierra fue demarcada con cercas para evitar disputas.
C1 adjective /əbˈtjuːs/

Obtuse

tonto; obtuso; lento de comprensión
Meaning
annoyingly insensitive or slow to understand; lacking in intelligence or perception
Example
He was being deliberately obtuse about the instructions.
Él estaba siendo deliberadamente obtuso sobre las instrucciones.
C1 adjective /dɪˈbeɪst/

debased

degradado
Meaning
having lost quality, value, or moral character
Example
The debased currency lost the trust of the people.
La moneda degradada perdió la confianza de la gente.
C1 noun ˈiː.θɒs

ethos

espíritu característico de una cultura, época o comunidad
Meaning
The characteristic spirit of a culture, era, or community as manifested in its beliefs and aspirations.
Example
The company's ethos is built on innovation and integrity.
El ethos de la empresa se basa en la innovación y la integridad.
C1 noun /əˈbɪs/

abyss

abismo
Meaning
a deep, immeasurable space, chasm, or void; something seemingly without end
Example
The climbers looked down into the dark abyss below.
Los escaladores miraron hacia abajo en el oscuro abismo.
C1 adjective /ˈpɑːm.pəs/

Pompous

pomposo; pretencioso; excesivamente grandioso
Meaning
showing off; pretentious; overly grand
Example
His pompous attitude annoyed everyone at the meeting.
Su actitud pomposa molestó a todos en la reunión.