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C1 noun /ˈdeɪtəm/ or /ˈdætəm/

datum

dato
Meaning
a single piece of information; a fact used as a basis for reasoning or calculation
Example
Each datum in the survey was carefully analyzed.
Cada dato en la encuesta fue cuidadosamente analizado.
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 noun /ˌɪnkjʊˈbeɪʃən/

incubation

el proceso de mantener huevos, células u organismos en las condiciones adecuadas para su desarrollo
Meaning
the process of keeping eggs, cells, or organisms in the right conditions for development
Example
The incubation of the eggs lasted for three weeks.
La incubación de los huevos duró tres semanas.
C1 adjective /ˈɡrændioʊs/

grandiose

grandioso
Meaning
Impressive or magnificent in appearance or style, often pretentiously so.
Example
He had grandiose plans of building a futuristic city in the desert.
Él tenía planes grandiosos de construir una ciudad futurista en el desierto.
C1 verb /ʃʌn/

Shun

evitar
Meaning
to deliberately avoid or stay away from someone or something
Example
He shuns public attention and prefers privacy.
Él evita la atención pública y prefiere la privacidad.
C1 noun /ˈlɔːriət/

laureate

galardonado
Meaning
A person honored with an award for outstanding achievement in a field, especially the arts or sciences.
Example
The Nobel laureate gave an inspiring lecture on peace.
El laureado Nobel dio una conferencia inspiradora sobre la paz.
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 ˌɪn.fɪlˈtreɪ.ʃən

infiltration

infiltración, acceso secreto
Meaning
The process of entering or gaining access to an organization or place surreptitiously.
Example
Cybersecurity prevents infiltration into sensitive data.
La ciberseguridad previene la infiltración en datos sensibles.
C1 adjective /hɜːrˈbɪv.ər.əs/

Herbivorous

herbívoro
Meaning
feeding on plants; plant-eating
Example
Cows are herbivorous animals that graze on grass.
Las vacas son animales herbívoros que pastan en la hierba.
C1 noun /peɪˈiː/

payee

beneficiario
Meaning
A person to whom money is paid or is to be paid.
Example
The payee must sign the check before cashing it.
El beneficiario debe firmar el cheque antes de cobrarlo.
C1 verb /diːˈfɒrɪst/

deforest

desforestar
Meaning
to clear an area of trees, usually on a large scale
Example
The region has been heavily deforested for agriculture.
La región ha sido deforestada en gran medida para la agricultura.
C1 verb /dɪˈpriːʃieɪt/

depreciate

depreciar
Meaning
to reduce in value over time
Example
Cars tend to depreciate quickly in their first few years.
Los coches tienden a depreciarse rápidamente en sus primeros años.
C1 verb /præns/

prance

caminar con arrogancia
Meaning
To move with high, springy steps, often to show off or attract attention.
Example
The horse pranced around the field gracefully.
El caballo caminaba orgulloso alrededor del campo.
C1 noun məˈriːn ˈsɜː.veɪ

marine survey

estudio marino. levantamiento marítimo.
Meaning
A systematic examination of the sea, seabed, and underwater features for the purpose of making maps or gathering other information.
Example
The marine survey identified the ideal cable routes.
El estudio marino identificó las rutas ideales para los cables.
C1 verb /ˈklæmbər/

clamber

escalar con dificultad
Meaning
to climb with effort or difficulty, often using both hands and feet
Example
The children clambered over the rocks to reach the cave.
Los niños escalaron las rocas para llegar a la cueva.
C1 verb /dɪˈmoʊt/

demote

degradar
Meaning
to reduce to a lower rank or position
Example
The manager decided to demote the employee for poor performance.
El gerente decidió degradar al empleado por su bajo rendimiento.
C1 adjective ʌnɪnˈhæbɪtəbəl

uninhabitable

inhabitable
Meaning
Not suitable or safe for people to live in.
Example
Rapid urbanization can make cities uninhabitable.
La rápida urbanización puede hacer que las ciudades sean inhabitables.
C1 noun,verb /pleɪt/

plait

trenza
Meaning
a braid of hair or straw; to braid
Example
She decided to plait her hair before the party.
Ella decidió trenzarse el cabello antes de la fiesta.
C1 adjective /ˌɪnɪkˈsplɪkəbl/

inexplicable

inexplicable
Meaning
Impossible to explain or understand.
Example
The sudden disappearance of the file was inexplicable.
La repentina desaparición del archivo fue inexplicable.
C1 adjective /kənˈɡrɛʃənl/

congressional

congresista
Meaning
relating to a congress, especially the US Congress
Example
The bill received strong congressional support.
El proyecto de ley recibió un fuerte apoyo congresista.
C1 adjective /nɪˈɡlɛktfʊl/

neglectful

desatento
Meaning
Failing to give proper care or attention.
Example
The neglectful parent left the child alone for hours.
El padre desatento dejó al niño solo durante horas.
C1 adjective /ɪˈspeʃəl/

especial

especial
Meaning
Particularly remarkable or significant; distinguished from others
Example
This is an especial opportunity you should not miss.
Esta es una oportunidad especial que no debes perder.
C1 adjective/verb /ˈsiːzənd/

seasoned

experimentado / sazonado
Meaning
Experienced in a particular activity; also, flavored with spices.
Example
She is a seasoned teacher with over 20 years of experience.
Ella es una maestra experimentada con más de 20 años de experiencia.
C1 noun /ɪnˈsɒm.ni.ə/

Insomnia

insomnio
Meaning
habitual sleeplessness; inability to sleep; the condition of being unable to sleep
Example
Her chronic insomnia made it difficult for her to concentrate during work hours.
Su insomnio crónico le dificultaba concentrarse durante las horas de trabajo.
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 /ʌnˈkæni/

uncanny

extraño
Meaning
Strange or mysterious, especially in an unsettling way.
Example
She has an uncanny ability to predict the future.
Ella tiene una extraña habilidad para predecir el futuro.
C1 adjective ɪˈveɪ.sɪv

evasive

evasivo, astuto, vago
Meaning
Tending to avoid commitment or self-revelation, especially by responding only indirectly.
Example
He gave an evasive answer to avoid trouble.
Él dio una respuesta evasiva para evitar problemas.
C1 adjective /ˌɪnkənˈkluːsɪv/

inconclusive

inconcluso
Meaning
Not leading to a definite result or decision.
Example
The investigation remained inconclusive due to a lack of evidence.
La investigación permaneció inconclusa debido a la falta de evidencia.
C1 adjective /səbˈsɪd.i.ər.i/

Subsidiary

subsidiario; secundario; relacionado con una empresa subsidiaria
Meaning
less important than the main thing; secondary; of or relating to a subsidiary company
Example
The subsidiary company handles all overseas operations.
La empresa subsidiaria maneja todas las operaciones en el extranjero.
C1 verb /bɪˈhɛd/

behead

decapitar
Meaning
to cut off a person's or animal's head; to remove the leader or most important part
Example
The historical account describes how the traitor was beheaded as punishment.
El relato histórico describe cómo el traidor fue decapitado como castigo.
C1 adjective /ɪmˈbrɔɪld/

embroiled

involucrado
Meaning
being deeply involved in a difficult situation, conflict, or scandal
Example
She found herself embroiled in a heated family dispute.
Se encontró a sí misma involucrada en una acalorada disputa familiar.
C1 adverb /ˈpiːs.miːl/

Piecemeal

fragmentado; en pedazos
Meaning
done or made gradually, one piece at a time; fragmentary; unsystematic
Example
The renovation was done piecemeal over several years due to budget constraints.
La renovación se hizo poco a poco durante varios años debido a las restricciones presupuestarias.
C1 noun /sɪˈkriː.ʃən/

Secretion

secreción
Meaning
a process by which substances are produced and discharged from a cell or gland
Example
Insulin secretion is crucial for blood sugar regulation.
La secreción de insulina es crucial para la regulación del azúcar en sangre.
C1 adjective /ˌrɛmɪˈnɪsənt/

reminiscent

rememorativo
Meaning
Tending to remind one of something; suggestive of something in the past.
Example
The smell of rain is reminiscent of my childhood in the village.
El olor a lluvia es rememorativo de mi infancia en el pueblo.
C1 verb/noun /pərˈvɜːrt/

pervert

pervertir / persona pervertida
Meaning
As a verb: to distort the meaning or purpose of something; as a noun: a person with abnormal or immoral sexual behavior.
Example
He tried to pervert the truth to escape punishment.
Él trató de pervertir la verdad para escapar del castigo.
C1 adjective /ɪˈlɪsɪt/

illicit

ilícito
Meaning
Forbidden by law, rules, or custom.
Example
The police shut down the illicit drug operation.
La policía cerró la operación de drogas ilícitas.
C1 noun /daɪˈsɛkʃən/

dissection

disección
Meaning
the act of cutting apart or analyzing something in detail, especially a body or structure
Example
The dissection of the specimen revealed important details about its structure.
La disección del espécimen reveló detalles importantes sobre su estructura.
C1 adjective /ˌɪn.ɪˈfɛk.tʃu.əl/

ineffectual

ineficaz
Meaning
Not producing any or the desired effect; lacking the ability or qualities to achieve a purpose.
Example
The manager’s ineffectual leadership caused the team to lose motivation.
El liderazgo ineficaz del gerente hizo que el equipo perdiera la motivación.
C1 adjective /bəˈnɑːl/ or /ˈbeɪnəl/

banal

común
Meaning
Lacking originality; boringly obvious and commonplace.
Example
His speech was full of banal clichés.
Su discurso estaba lleno de clichés comunes.
C1 noun /ɛkˈspeɪtriət/

expatriate

expatriado
Meaning
a person who lives outside their native country
Example
Many expatriates gather in the city’s international community.
Muchos expatriados se reúnen en la comunidad internacional de la ciudad.
C1 noun /klaʊt/

clout

influencia
Meaning
influence or power, especially in politics or business
Example
The businessman has a lot of political clout.
El hombre de negocios tiene mucha influencia política.
C1 adjective ləˈθɑːrdʒɪk

lethargic

letárgico
Meaning
Being inactive due to lack of physical or mental energy
Example
After a heavy meal, he felt lethargic and sleepy.
Después de una comida pesada, se sintió letárgico y somnoliento.
C1 noun /ˌkɒk.əˈtuː/

Cockatoo

cóctel
Meaning
a large parrot with a prominent crest that can be raised or lowered
Example
The white cockatoo raised its beautiful crest.
El cóctel blanco levantó su hermosa cresta.
C1 adjective /fərˈlɔːrn/

forlorn

desamparado, triste
Meaning
extremely sad, lonely, or abandoned
Example
The abandoned puppy looked so forlorn in the rain.
El cachorro abandonado se veía tan triste bajo la lluvia.
C1 verb /ˈtɒpl/

topple

caer
Meaning
to fall or cause to fall over; to overthrow
Example
The earthquake caused the old building to topple.
El terremoto causó que el viejo edificio se cayera.
C1 adjective /ˈfeɪt.fəl/

fateful

decisivo o fatal
Meaning
having significant or disastrous consequences
Example
Their fateful decision changed the course of history.
Su decisión decisiva cambió el curso de la historia.
C1 noun /ˈwɔː.tər ˈtʃes.nʌt/

Water Chestnut

castaña de agua
Meaning
aquatic plant with edible white crisp tubers
Example
Water chestnuts add a nice crunch to stir-fry dishes.
Las castañas de agua añaden un buen crujido a los platos salteados.
C1 noun /ˈɛksələnsɪ/

excellency

excelencia
Meaning
a title of honor for people of high rank, especially ambassadors or governors
Example
His Excellency the Ambassador attended the ceremony.
Su Excelencia el Embajador asistió a la ceremonia.
C1 verb /ˈlɛvi/

levy

imponer
Meaning
To impose or collect, especially a tax or fine.
Example
The government decided to levy a new tax on luxury goods.
El gobierno decidió imponer un nuevo impuesto sobre los productos de lujo.
C1 adjective /ˈɡræn.jʊ.lər/

granular

granular
Meaning
Consisting of small grains or particles; detailed and specific.
Example
The report provided a granular analysis of the market data.
El informe proporcionó un análisis detallado del mercado.
C1 adjective /məˈtɪk.jə.ləs/

meticulous

Extremadamente cuidadoso y preciso en la atención al detalle
Meaning
Extremely careful and precise in attention to detail
Example
A meticulous researcher checks every detail before publishing.
Un investigador meticuloso revisa cada detalle antes de publicar.
C1 adjective /ˈæntɪkweɪtɪd/

antiquated

anticuado
Meaning
Old-fashioned or outdated.
Example
The office still uses an antiquated filing system.
La oficina todavía usa un sistema de archivos anticuado.
C1 verb /ˈhaɪtən/

heighten

aumentar
Meaning
to make or become greater in intensity or degree
Example
The announcement served to heighten the excitement in the room.
El anuncio sirvió para aumentar la emoción en la habitación.
C1 adverb /ˌhɛdˈfɜrst/

headfirst

cabeza adelante
Meaning
With the head leading; in a reckless or hasty manner.
Example
He dived headfirst into the pool.
Se zambulló cabeza primero en la piscina.
C1 noun /læps/

Lapse

fallo temporal; lapsus;
Meaning
a temporary failure of concentration, memory, or judgment; the termination of a right or privilege
Example
There was a brief lapse in security that allowed the intruder to enter the building.
Hubo un breve lapsus de seguridad que permitió al intruso entrar al edificio.
C1 noun ˌdɪs.æmˌbɪɡ.juˈeɪ.ʃən

disambiguation

desambiguación
Meaning
The removal of ambiguity by making something clear and unambiguous.
Example
The AI system applies disambiguation to refine text understanding.
El sistema de IA aplica la disambiguación para refinar la comprensión del texto.
C1 noun ˌkɒn.ʃiˈen.ʃəs.nəs

conscientiousness

conciencia
Meaning
The quality of wishing to do one's work or duty well and thoroughly; diligence.
Example
Her conscientiousness in work led to a well-organized project.
Su conciencia en el trabajo condujo a un proyecto bien organizado.
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 adjective /ˈdɑːsəl/ or /ˈdəʊsaɪl/

docile

docil
Meaning
easily managed, taught, or controlled; submissive
Example
The docile puppy quickly learned new tricks.
El cachorro dócil aprendió rápidamente nuevos trucos.
C1 verb /ˈskaʊər/

scour

fregar / buscar exhaustivamente
Meaning
to clean or brighten the surface of something by scrubbing; to search thoroughly
Example
She scoured the kitchen until it shone.
Ella fregó la cocina hasta que brilló.
C1 adjective /dɪsˈɪntrəstɪd/

disinterested

desinteresado
Meaning
not influenced by personal interest; impartial or neutral
Example
The judge remained disinterested in the case.
El juez se mantuvo desinteresado en el caso.
C1 adjective /ˈperɪɡrɪn/

Peregrine

errante; migratorio; viajero
Meaning
wandering; traveling; migratory
Example
The peregrine falcon is known for its incredible speed.
El halcón peregrino es conocido por su increíble velocidad.
C1 noun /ˌpɜːrsɪˈkjuːʃn/

persecution

persecución
Meaning
the act of treating someone cruelly or unfairly because of their religion, race, or beliefs
Example
The persecution of minorities has been condemned worldwide.
La persecución de las minorías ha sido condenada mundialmente.
C1 noun prɪˌsɪp.ɪˈteɪ.ʃən

precipitation

precipitación
Meaning
Rain, snow, sleet, or hail that falls to or condenses on the ground.
Example
Annual precipitation levels are decreasing.
Los niveles anuales de precipitación están disminuyendo.
C1 adjective /ˈstraɪ.dənt/

strident

estridente, ruidoso
Meaning
loud and harsh; presenting a point of view in a forceful way
Example
His strident voice made the debate uncomfortable.
Su voz estridente hizo que el debate fuera incómodo.
C1 verb /ˈɡlɪsən/

glisten

brillar
Meaning
To shine with a sparkling light, often when wet or polished.
Example
The grass glistened with morning dew.
La hierba brillaba con el rocío de la mañana.
C1 adjective /ˈplaɪəbəl/

pliable

flexible
Meaning
easily bent or flexible; adaptable
Example
The metal is pliable enough to be shaped into jewelry.
El metal es lo suficientemente flexible como para ser moldeado en joyas.
C1 noun ɪnˈdɪdʒɪnəs trəˈdɪʃənz

Indigenous Traditions

Tradiciones indígenas
Meaning
Cultural practices, beliefs, and customs that have been passed down through generations among native peoples.
Example
Indigenous traditions in the Chittagong Hill Tracts are unique.
Las tradiciones indígenas en los Chittagong Hill Tracts son únicas.
C1 noun /ˈzoʊdiæk/

Zodiac

signo zodiacal
Meaning
a belt of the heavens within which lie the paths of the sun, moon, and planets; the twelve astrological signs
Example
What is your zodiac sign?
¿Cuál es tu signo zodiacal?
C1 adjective /əˈbreɪsɪv/

abrasive

áspero, rugoso o capaz de desgastar por frotamiento
Meaning
harsh, rough, or capable of wearing down by rubbing
Example
His abrasive tone made everyone uncomfortable.
Su tono áspero hizo que todos se sintieran incómodos.
C1 noun /rɪˈtrækʃən/

retraction

revocación, retractación
Meaning
the act of taking back a statement, promise, or belief
Example
The newspaper issued a retraction of the false report.
El periódico emitió una retractación del informe falso.
C1 noun /ˈɑːrmfʊl/

armful

brazo lleno
Meaning
As much as can be carried in one or both arms.
Example
She carried an armful of books into the library.
Ella llevó un brazo lleno de libros a la biblioteca.
C1 adjective /vɪˈveɪʃəs/

vivacious

vivaz
Meaning
Attractively lively and animated.
Example
She was admired for her vivacious personality.
Ella fue admirada por su personalidad vivaz.
C1 noun /ˌdʒʌkstəpəˈzɪʃən/

juxtaposition

yuxtaposición
Meaning
The fact of two things being seen or placed close together with contrasting effect.
Example
The juxtaposition of light and dark colors created a dramatic effect.
La yuxtaposición de los colores claros y oscuros creó un efecto dramático.
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 noun /ˌɛtɪˈmɒlədʒi/

etymology

etimología
Meaning
The study of the origin of words and how their meanings and forms have evolved.
Example
The etymology of the word 'salary' comes from the Latin word for salt.
La etimología de la palabra 'salario' proviene de la palabra latina para sal.
C1 noun /ˈlæt.ɪ.tuːd/

Latitude

latitud
Meaning
the angular distance of a place north or south of the earth's equator; freedom to act or think
Example
The GPS device showed our exact latitude and longitude coordinates on the map.
El dispositivo GPS mostró nuestras coordenadas exactas de latitud y longitud en el mapa.
C1 verb pleɪɡd

plagued

afligido
Meaning
Troubled or afflicted persistently by problems or difficulties.
Example
People are plagued by anxiety and depression.
Las personas están afligidas por la ansiedad y la depresión.
C1 verb /ˈpætər/

patter

hacer un sonido repetido de golpecitos suaves / hablar rápidamente de manera mecánica
Meaning
to make a repeated light tapping sound; to talk quickly in a rehearsed or mechanical way
Example
Rain pattered softly on the window.
La lluvia golpeaba suavemente en la ventana.
C1 noun /ˈblæs.fə.mi/

blasphemy

blasfemia
Meaning
the act of speaking disrespectfully about God or sacred things
Example
In some countries, blasphemy is a punishable offense.
En algunos países, la blasfemia es un delito castigable.
C1 verb; noun /beltʃ/

belch

eructar
Meaning
to expel air noisily from the stomach through the mouth; to emit or pour out suddenly and forcefully
Example
After drinking the soda, he belched loudly.
Después de beber el refresco, eructó fuerte.
C1 verb /əbˈsɛs/

obsess

obsesionarse
Meaning
To preoccupy or fill the mind of someone continually and to an excessive degree.
Example
She tends to obsess over small details.
Ella tiende a obsesionarse con los pequeños detalles.
C1 noun /ˈtuːsəm/

twosome

pareja
Meaning
A pair of people considered together, often in a romantic or competitive context.
Example
They entered the dance competition as a twosome.
Entraron a la competencia de baile como una pareja.
C1 noun /ˌsɛlfsəˈfɪʃənsi/

Self-sufficiency

autosuficiencia
Meaning
the ability to supply one's own needs without external assistance; independence
Example
The farm achieved complete self-sufficiency in food production.
La granja logró la autosuficiencia completa en la producción de alimentos.
C1 adjective /ʌnˈtʌtʃəbəl/

Untouchable

intocable; más allá de la crítica o el ataque
Meaning
not able to be touched or affected; beyond criticism or attack
Example
The CEO seemed untouchable despite the scandal.
El CEO parecía intocable a pesar del escándalo.
C1 verb /ˈpɛtrɪfaɪ/

petrify

petrificar
Meaning
to make someone so frightened that they are unable to move or think; to turn into stone
Example
The loud noise petrified the little child.
El ruido fuerte petrificó al niño pequeño.
C1 noun/verb /dɛnt/

dent

abolladura
Meaning
a small hollow mark on the surface of something; to make a small hollow mark
Example
The accident left a dent in the car door.
El accidente dejó una abolladura en la puerta del coche.
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 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 noun/verb /dɪsˈkwaɪət/

disquiet

inquietud
Meaning
A feeling of worry or unease; to make someone feel anxious or uneasy.
Example
The strange silence filled the room with disquiet.
El extraño silencio llenó la habitación de inquietud.
C1 noun /bʌm/

bum

trasero
Meaning
informal term for the buttocks; also a homeless or lazy person
Example
He sat on his bum all day doing nothing.
Estuvo sentado en su trasero todo el día sin hacer nada.
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 noun /ˈoʊ.vər spɪl/

Over-spill

desbordamiento
Meaning
the overflow of liquid from a container; excess that cannot be contained
Example
The overspill from the river flooded nearby farms.
El desbordamiento del río inundó las granjas cercanas.
C1 adjective /ˈpoʊləraɪzd/

polarized

polarizado
Meaning
divided into two sharply contrasting groups or opinions
Example
The debate polarized the community on the issue of climate change.
El debate polarizó a la comunidad sobre el tema del cambio climático.
C1 noun /ˈnɑv.ɪs/

Novice

novato
Meaning
a person new to or inexperienced in a field or situation; a beginner
Example
As a novice driver, she was very careful on the road.
Como un conductor novato, ella estaba muy cuidadosa en la carretera.
C1 noun /ˈblɒk.ɪdʒ/

Blockage

bloqueo
Meaning
an obstruction that makes movement or flow difficult or impossible
Example
The drain blockage caused water to overflow in the kitchen.
El bloqueo del drenaje causó que el agua se desbordara en la cocina.
C1 noun ˈkætəlɪst

catalyst

catalizador
Meaning
A person or thing that precipitates an event or change.
Example
His speech acted as a catalyst for change in the community.
Su discurso actuó como un catalizador para el cambio en la comunidad.
C1 adjective /ˈɡæl.ənt/

gallant

valiente, héroe
Meaning
Brave, heroic, or chivalrous.
Example
The gallant firefighter saved the child from the burning building.
El valiente bombero salvó al niño del edificio en llamas.
C1 noun /ˌkɒndʒʊˈɡeɪʃən/

conjugation

conjugación
Meaning
the variation of the form of a verb to indicate tense, person, and number
Example
French verbs have complex conjugations.
Los verbos franceses tienen conjugaciones complejas.
C1 adjective /ɪˈmjuː.tə.bəl/

immutable

inmutable
Meaning
Unchangeable, permanent, or fixed
Example
The laws of physics are considered immutable.
Las leyes de la física son consideradas inmutables.
C1 adjective /trænˈsen.dənt/

transcendent

más allá de la experiencia humana normal o meramente física
Meaning
Beyond or above the range of normal or merely physical human experience.
Example
His art has a transcendent quality.
Su arte tiene una calidad trascendental.
C1 adverb kəmˈpæktli

compactly

compactamente
Meaning
In a closely packed or dense manner.
Example
Protons and neutrons are compactly arranged.
Los protones y los neutrones están organizados compactamente.
C1 verb /əˈvɛndʒ/

avenge

vengar
Meaning
to inflict harm in return for an injury or wrong done to oneself or another
Example
He vowed to avenge his brother's death.
Él juró vengar la muerte de su hermano.
C1 noun /ˈbreɪkər/

breaker

disyuntor (algo que rompe, una ola grande que se rompe cerca de la orilla, o un dispositivo que interrumpe un circuito eléctrico)
Meaning
A person or thing that breaks something; a large sea wave that breaks into foam near the shore; a device that interrupts an electric circuit.
Example
The breaker tripped during the storm, cutting off electricity.
El disyuntor se disparó durante la tormenta, cortando la electricidad.
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 /ˈbjuːɡəl/

Bugle

trombón sin válvulas
Meaning
a brass musical instrument similar to a trumpet but without valves, used especially for military calls
Example
The soldier played the bugle to signal the start of the ceremony.
El soldado tocó el trombón sin válvulas para señalar el comienzo de la ceremonia
C1 noun, verb /məˈnuː.vər/

maneuver

maniobra / hábil
Meaning
a planned or skillful movement or action; to move skillfully or carefully
Example
The pilot maneuvered the plane through the storm.
El piloto maniobró el avión a través de la tormenta.
C1 adjective /ˈtʃɛkərd/

chequered

a rayas
Meaning
Having a pattern of squares, or marked by varied and contrasting experiences or periods.
Example
He had a chequered career with both great successes and failures.
Tuvo una carrera a rayas con grandes éxitos y fracasos.
C1 noun /ˈmɒd.ə.sti/

Modesty

modestia; humildad
Meaning
the quality of being humble and not boastful about achievements
Example
Despite his success, he showed great modesty.
A pesar de su éxito, mostró gran modestia.
C1 adverb /rɪˈspek.tə.bli/

Respectably

de manera respetable; decente;
Meaning
in a way that is worthy of respect; decently; properly
Example
She was dressed respectably for the interview.
Ella estaba vestida de manera respetable para la entrevista.
C1 noun /ˌdep.rɪˈveɪ.ʃən/

deprivation

privación, escasez, falta
Meaning
The damaging lack of material benefits considered to be basic necessities in a society.
Example
Sleep deprivation affects cognitive function.
La privación de sueño afecta la función cognitiva.
C1 verb /ˈtɛðər/

tether

atar
Meaning
To tie an animal with a rope or chain so it cannot move far.
Example
The farmer tethered the goat to a post.
El granjero ató la cabra a un poste.
C1 adjective /ˈlɛdʒəbl/

legible

legible
Meaning
clear enough to read
Example
Her handwriting was barely legible.
Su letra apenas era legible.
C1 noun ˌdiː.sen.trə.laɪˈzeɪ.ʃən

decentralization

descentralización
Meaning
The transfer of authority from central to local government.
Example
Decentralization promotes regional autonomy.
La descentralización promueve la autonomía regional.
C1 noun /ɪmˈbɛzlmənt/

embezzlement

malversación
Meaning
The act of dishonestly taking money or property entrusted to one's care.
Example
The accountant was arrested for embezzlement of company funds.
El contador fue arrestado por la malversación de fondos de la empresa.
C1 verb /dɪsˈkʌlər/

discolor

descolorar
Meaning
to change color, especially in a way that spoils the original appearance
Example
The fabric began to discolor after being left in the sun.
La tela comenzó a descolorarse después de dejarla al sol.
C1 verb /ˌriːɪmˈbɜːrs/

reimburse

reembolsar
Meaning
to pay back money to someone who has spent it or lost it
Example
The company reimbursed him for travel expenses.
La empresa le reembolsó los gastos de viaje.
C1 adjective /dɪˈspɪkəbl/

despicable

despreciable
Meaning
Deserving hatred and contempt; vile or shameful.
Example
His despicable actions shocked the entire community.
Sus acciones despreciables sorprendieron a toda la comunidad.
C1 noun /ˈpɔɪ.nən.si/

poignancy

tristeza, congoja
Meaning
the quality of evoking a keen sense of sadness or regret; emotionally touching
Example
The poignancy of the farewell brought tears to everyone's eyes.
La tristeza de la despedida trajo lágrimas a los ojos de todos.
C1 verb /ˈmʌmbəl/

mumble

murmurar
Meaning
To speak quietly and not clearly so that words are difficult to understand.
Example
He mumbled an apology before leaving.
Él murmuró una disculpa antes de irse.
C1 adjective /kræs/

crass

tosco, sin sensibilidad o refinamiento
Meaning
lacking sensitivity, refinement, or intelligence
Example
His crass remarks offended everyone at the meeting.
Sus comentarios groseros ofendieron a todos en la reunión.