self-absorbed
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C1 adjective /ˌsɛlf əbˈzɔːrbd/

self-absorbed

egocéntrico
Meaning
Excessively preoccupied with oneself and one’s own thoughts, feelings, or interests.
Example
He was too self-absorbed to notice his friend's distress.
Estaba demasiado egocéntrico para notar la angustia de su amigo.
C1 noun, verb /pliːt/

pleat

pliegue
Meaning
a fold in fabric made by doubling the material back upon itself
Example
She added a pleat to the skirt for extra volume.
Ella agregó un pliegue a la falda para más volumen.
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 adjective /məˈlɪɡnənt/

malignant

maligno
Meaning
dangerous or harmful in influence or effect; medically, tending to invade and destroy tissue
Example
Doctors confirmed that the tumor was malignant.
Los doctores confirmaron que el tumor era maligno.
C1 adjective /ɪˈfɛm.ər.əl/

ephemeral

efímero
Meaning
Lasting for a very short time; temporary or transitory.
Example
The beauty of cherry blossoms is ephemeral.
La belleza de las flores de cerezo es efímera.
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 adjective /ˈskrɪptʃərəl/

scriptural

escritural
Meaning
Relating to or contained in the scriptures or holy writings.
Example
The priest gave a scriptural reference during the sermon.
El sacerdote dio una referencia escritural durante el sermón.
C1 noun /ˈwɪŋˌspæn/

wingspan

envergadura
Meaning
the distance from the tip of one wing to the tip of the other wing
Example
The eagle has an impressive wingspan of over two meters.
El águila tiene una impresionante envergadura de más de dos metros.
C1 noun /meər/

Mare

yegua
Meaning
an adult female horse
Example
The beautiful mare galloped across the meadow.
La hermosa yegua galopó por el prado.
C1 verb /ˈmɛdəl/

meddle

interferir en algo que no te concierne
Meaning
to interfere in something that is not one's concern
Example
He always tries to meddle in other people’s business.
Él siempre intenta interferir en los asuntos de los demás.
C1 verb /hɔːrd/

hoard

acumular
Meaning
to accumulate and hide away a large supply of something, often secretly
Example
During the crisis, many people began to hoard food and water.
Durante la crisis, muchas personas comenzaron a acumular comida y agua.
C1 verb /ˈveɪpəraɪz/

vaporize

vaporizar
Meaning
to turn into vapor or gas
Example
The heat of the sun can vaporize water from the surface.
El calor del sol puede vaporizar el agua de la superficie.
C1 noun /niːʃ/

Niche

nicho de mercado, segmento especializado, mercado objetivo
Meaning
A specialized segment of the market for a particular kind of product or service.
Example
Finding the right niche is key to a successful business.
Encontrar el nicho adecuado es clave para un negocio exitoso.
C1 adjective ˈklaɪ.mət rɪˈzɪl.i.ənt

climate-resilient

resistente al clima
Meaning
Able to cope with the adverse effects of climate change; sustainable and adaptable.
Example
Climate-resilient crops can survive extreme weather conditions.
Los cultivos resistentes al clima pueden sobrevivir a condiciones meteorológicas extremas.
C1 adjective ˈfɔːr.mɪ.də.bəl

formidable

formidable
Meaning
Inspiring fear or respect through being impressively large, powerful, intense, or capable.
Example
The boxer was a formidable opponent in the ring.
El boxeador era un oponente formidable en el ring.
C1 verb /ˈæmbʊʃ/

ambush

emboscar
Meaning
To attack suddenly and unexpectedly from a hidden position.
Example
The soldiers planned to ambush the enemy at dawn.
Los soldados planearon emboscar al enemigo al amanecer.
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 noun /krɛst/

crest

cima
Meaning
the top of a hill, wave, or mountain; a symbol of identity
Example
The hikers reached the crest of the mountain at sunrise.
Los excursionistas llegaron a la cima de la montaña al amanecer.
C1 adjective /ɪnˈdetɪd/

Indebted

endeudado; agradecido
Meaning
owing money or gratitude to someone; obligated; grateful
Example
I am deeply indebted to my teacher for all her guidance.
Estoy profundamente endeudado con mi profesora por toda su orientación.
C1 adjective /ˈliː.ni.ənt/

Lenient

tolerante; indulgente; misericordioso; no estricto en el castigo o juicio
Meaning
tolerant; forgiving; merciful; not strict in punishment or judgment
Example
The teacher was lenient with students who submitted their homework late.
El maestro fue tolerante con los estudiantes que entregaron su tarea tarde.
C1 verb ˈhɪndər

hinder

obstruir
Meaning
To obstruct or delay the progress of something
Example
Excessive rain hinders vegetable growth.
La lluvia excesiva dificulta el crecimiento de las verduras.
C1 noun /ˌspɒn.təˈneɪ.ɪ.ti/

spontaneity

espontaneidad
Meaning
The quality of being spontaneous; natural and unplanned behavior.
Example
His spontaneity makes him a great conversationalist.
Su espontaneidad lo convierte en un gran conversador.
C1 noun /ˈfiː.nɪks/

phoenix

ave fénix
Meaning
a mythical bird that is reborn from its ashes; symbol of immortality or renewal
Example
The legend says the phoenix rises from its ashes every 500 years.
La leyenda dice que el fénix se levanta de sus cenizas cada 500 años.
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 /ˈsɑːri/

Saree

sari
Meaning
a garment consisting of a length of cotton or silk elaborately draped around the body, traditionally worn by women from South Asia
Example
She looked elegant in her red silk saree at the festival.
Ella lucía elegante con su sari de seda roja en el festival.
C1 noun /nuːs/

Noose

lazo
Meaning
a loop with a running knot used for hanging; a trap or snare
Example
The cowboy made a noose to catch the wild horse.
El vaquero hizo un lazo para atrapar al caballo salvaje.
C1 noun /ˈbænɪstər/

banister

barandal
Meaning
a railing supported by posts at the side of a staircase or balcony
Example
She held the banister tightly while going down the stairs.
Ella sujetó el barandal con fuerza mientras bajaba las escaleras.
C1 noun /ˈɪŋ.krə.mənt/

Increment

aumento
Meaning
an increase or addition, especially one of a series on a fixed scale; a regular increase in salary
Example
He received an annual increment of five percent in his salary this year.
Recibió un aumento anual del cinco por ciento en su salario este año.
C1 noun /straɪf/

strife

conflicto, lucha
Meaning
angry or violent conflict; struggle or discord
Example
The region has been torn apart by political strife.
La región ha sido desgarrada por el conflicto político.
C1 verb /ˈpɜːrpɔːrt/

purport

pretender
Meaning
to claim or profess something, often falsely
Example
The document purports to be an official government report.
El documento pretende ser un informe oficial del gobierno.
C1 verb /riːˈpeɪ.tri.eɪt/

repatriate

repatriar
Meaning
To return someone to their own country, often after war or imprisonment.
Example
The government worked to repatriate the refugees safely.
El gobierno trabajó para repatriar a los refugiados de manera segura.
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 noun /ɒpˈtɒmɪtrɪst/

optometrist

optometrista
Meaning
A healthcare professional who examines eyes and prescribes corrective lenses.
Example
The optometrist prescribed new glasses for her.
El optometrista le recetó nuevos anteojos.
C1 adjective /ˈfɜːrtɪv/

furtive

furtivo
Meaning
Attempting to avoid notice or attention, typically because of guilt or a belief that discovery would lead to trouble.
Example
He cast a furtive glance at the door before leaving.
Él echó una mirada furtiva a la puerta antes de salir.
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 noun /ˈbɪɡətri/

bigotry

intolerancia
Meaning
Intolerance toward those who hold different opinions or lifestyles.
Example
Her bigotry prevented her from accepting people with different beliefs.
Su intolerancia le impidió aceptar a personas con creencias diferentes.
C1 adjective ɪˈθɪə.ri.əl

ethereal

celestial, delicado, sobrenatural
Meaning
Extremely delicate and light in a way that seems too perfect for this world.
Example
Her voice had an ethereal quality.
Su voz tenía una calidad etérea.
C1 noun /naɪˈiːvteɪ/

naivete

ingenuidad
Meaning
The quality of being naive; lack of experience, wisdom, or judgment.
Example
His naivete made him an easy target for manipulation.
Su ingenuidad lo convirtio en un blanco facil para la manipulacion.
C1 noun /ˈprɒspɛktər/

prospector

buscador de minerales
Meaning
a person who searches for mineral deposits, especially gold
Example
The prospector spent years in the mountains searching for gold.
El prospector pasó años en las montañas buscando oro.
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 adjective /kɔɪ/

coy

tímido, reservado
Meaning
reluctant to give details or reveal feelings; shy or reserved
Example
She gave a coy smile when asked about her plans.
Ella dio una sonrisa tímida cuando le preguntaron sobre sus planes.
C1 noun /ˈænəɡræm/

anagram

una palabra o frase formada reordenando las letras de otra palabra o frase.
Meaning
A word or phrase formed by rearranging the letters of another word or phrase.
Example
The word 'listen' is an anagram of 'silent'.
La palabra 'listen' es un anagrama de 'silent'.
C1 noun ˈθɜː.məl stres

thermal stress

estrés térmico
Meaning
Stress caused by excessive heat that affects plant growth and development.
Example
High thermal stress affects plant growth.
El estrés térmico afecta el crecimiento de las plantas.
C1 noun /ˈmɔː.tər ænd ˈpes.əl/

Mortar and Pestle

mortero y pistilo
Meaning
a bowl and grinding tool used to crush and grind spices, herbs, and other substances
Example
She ground the spices using a mortar and pestle.
Ella molió las especias usando un mortero y pistilo.
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 adjective /ɪmˈpɜːmiəbl/

impermeable

impermeable
Meaning
Not allowing fluid or gas to pass through.
Example
The container is made of impermeable plastic.
El contenedor está hecho de plástico impermeable.
C1 noun /ˈɛpɪθɛt/

epithet

epíteto
Meaning
A descriptive phrase or word used to characterize someone or something, often as a nickname.
Example
He earned the epithet ‘The Great’ for his remarkable achievements.
Ganó el epíteto ‘El Grande’ por sus logros notables.
C1 noun kəˈmjunəl ˈhɑrməni

communal harmony

armonía comunal
Meaning
Peaceful coexistence and cooperation among different groups in a community.
Example
Maintaining communal harmony requires mutual respect and understanding.
Mantener la armonía comunal requiere respeto y comprensión mutuos.
C1 noun /ˈtrɪŋkɪt/

trinket

adorno pequeño
Meaning
a small ornament or piece of jewelry that is not expensive
Example
She bought a little trinket from the beach market as a souvenir.
Compró un pequeño adorno en el mercado de la playa como recuerdo.
C1 noun /ˈtæntrəm/

tantrum

berrinche
Meaning
An uncontrolled outburst of anger and frustration, typically in a young child.
Example
The child threw a tantrum when he didn’t get the toy.
El niño hizo un berrinche cuando no consiguió el juguete.
C1 noun, verb /spreɪn/

sprain

esguince
Meaning
an injury to a joint in which the ligaments are stretched or torn
Example
She sprained her ankle while running in the park.
Ella se torció el tobillo mientras corría en el parque.
C1 verb /dɪˈnəʊt/

denote

denotar
Meaning
To be a sign of; to indicate or mean something.
Example
A red flag denotes danger.
Una bandera roja denota peligro.
C1 adjective /ˈʃɪvəlrəs/

chivalrous

caballeroso
Meaning
Behaving in a courteous, gallant, and honorable way, especially toward women.
Example
He was chivalrous, always opening doors for others.
Él era caballeroso, siempre abriendo puertas para los demás.
C1 noun /ɪmˌpɒsəˈbɪlɪti/

impossibility

imposibilidad
Meaning
the state or fact of being impossible; something that cannot be done or achieved
Example
Finishing the project in one day was an impossibility.
Terminar el proyecto en un día fue una imposibilidad.
C1 verb sɪˈkwɛstər

sequester

aislar, esconder
Meaning
To isolate or hide away.
Example
The carbon captured by trees can be sequestered for years.
El carbono capturado por los árboles puede ser aislado durante años.
C1 noun rɪˌkuːpərˈeɪʃən

recuperation

recuperación
Meaning
The process of gradually recovering from illness or fatigue
Example
Rest is essential for recuperation after illness.
El descanso es esencial para la recuperación después de una enfermedad.
C1 noun /ˈækəleɪd/

accolade

accolade
Meaning
An award, honor, or expression of praise.
Example
She received an accolade for her outstanding performance.
Ella recibió un reconocimiento por su destacado desempeño.
C1 noun dɪˈsʌɪsɪvnɪs

decisiveness

capacidad de tomar decisiones
Meaning
The ability to make decisions quickly and effectively.
Example
His decisiveness during the crisis saved the company.
Su capacidad de tomar decisiones durante la crisis salvó a la empresa.
C1 verb /sɪˈkriːt/

secrete

secreción
Meaning
to produce and release a substance from a cell, gland, or organ
Example
The pancreas secretes insulin to regulate blood sugar levels.
El páncreas secreta insulina para regular los niveles de azúcar en la sangre.
C1 noun /ɪˈmɜː.ʃən/

immersion

inmersión
Meaning
Complete engagement in an environment or experience.
Example
Immersion in VR games makes users feel like they are inside the virtual world.
La inmersión en juegos de VR hace que los usuarios sientan como si estuvieran dentro del mundo virtual.
C1 adverb /ˈɒp.tɪ.məl.i/

optimally

de manera óptima
Meaning
In the most effective or efficient way possible.
Example
Tasks should be allocated optimally for maximum output.
Las tareas deben asignarse de manera óptima para obtener el máximo rendimiento.
C1 adverb /ˈaʊtwədli/

Outwardly

externamente; superficialmente;
Meaning
on the surface; externally; in appearance
Example
Outwardly, he seemed calm, but inside he was nervous.
Exteriormente, parecía tranquilo, pero por dentro estaba nervioso.
C1 noun /ɪnˈvɜːrʒən/

inversion

inversión
Meaning
A reversal of the normal order, position, or relationship.
Example
In poetry, inversion is often used to create emphasis.
En poesía, la inversión se usa a menudo para crear énfasis.
C1 noun ɪnˈdaʊmənt

endowment

donación, legado
Meaning
An income or form of property given or bequeathed to someone.
Example
The university received a large endowment for research.
La universidad recibió una gran donación para la investigación.
C1 adjective /ˈhæɡ.ərd/

Haggard

parecer exhausto y enfermo, especialmente por fatiga, preocupación o sufrimiento
Meaning
looking exhausted and unwell, especially from fatigue, worry, or suffering
Example
After working three nights without sleep, he looked haggard.
Después de trabajar tres noches sin dormir, se veía agotado.
C1 noun /ɡɔːrd/

Gourd

calabaza
Meaning
a climbing plant with large fruits that have hard shells when dried
Example
The bottle gourd curry was delicious and nutritious.
El curry de calabaza en botella estaba delicioso y nutritivo.
C1 noun /ˈtrɪb.jə.ter.i/

Tributary

afluente
Meaning
a river or stream flowing into a larger river or lake
Example
The tributary joins the main river near the city.
El afluente se une al río principal cerca de la ciudad.
C1 noun /ˈkæzəm/

chasm

grieta / gran diferencia
Meaning
a deep fissure in the earth's surface or a wide difference between people or ideas
Example
There was a great chasm between the two political parties.
Había una gran grieta entre los dos partidos políticos.
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 noun /pʌnˈdʒɑː.bi/

Punjabi

punyabi
Meaning
a traditional long shirt worn in South Asia, typically loose-fitting
Example
He wore a white punjabi for the festival celebration.
Él usó un punyabi blanco para la celebración del festival.
C1 noun /buːn/

boon

bendición
Meaning
A thing that is helpful or beneficial.
Example
The internet is a boon to modern education.
Internet es una bendición para la educación moderna.
C1 adjective /dɪˈreɪndʒd/

deranged

loco
Meaning
mentally disturbed or insane; behaving irrationally
Example
The deranged man shouted nonsense in the street.
El hombre loco gritó tonterías en la calle.
C1 adjective /ˈbrɪslɪŋ/

bristling

erizado; lleno de energía
Meaning
full of energy, anger, or excitement; showing bristles standing up
Example
He entered the room bristling with confidence.
Entró en la habitación lleno de confianza.
C1 verb /pɜːrdʒ/

purge

purificar
Meaning
To remove unwanted feelings, people, or things; to cleanse or purify.
Example
The new leader promised to purge corruption from the government.
El nuevo líder prometió purgar la corrupción del gobierno.
C1 adjective /sɪˈnɒnɪməs/

synonymous

sinónimo
Meaning
having the same or nearly the same meaning; closely associated with something
Example
For many people, her name is synonymous with generosity.
Para muchas personas, su nombre es sinónimo de generosidad.
C1 noun /ˈmɔːrtər/

mortar

mezcla para juntar ladrillos / pequeño cañón
Meaning
a mixture used in building to bond bricks or stones together; also, a small cannon for firing shells
Example
The workers applied mortar between the bricks.
Los trabajadores aplicaron mortero entre los ladrillos.
C1 noun/adjective /ˈmɪstɪk/

mystic

místico, buscador espiritual
Meaning
relating to mysteries, spirituality, or hidden truths; a person who seeks spiritual insight
Example
The mystic devoted his life to meditation and spiritual discovery.
El místico dedicó su vida a la meditación y al descubrimiento espiritual.
C1 verb /wɪns/

wince

hacer una mueca por dolor
Meaning
To make an involuntary movement of the face or body as a result of pain or distress.
Example
He winced when the doctor touched his injured arm.
Él hizo una mueca cuando el doctor tocó su brazo herido.
C1 adjective /əbˈnɒkʃəs/

Obnoxious

odioso
Meaning
extremely unpleasant; offensive; annoying
Example
His obnoxious behavior at the party annoyed everyone.
Su comportamiento odioso en la fiesta molestó a todos.
C1 noun /ˌrev.əˈluː.ʃən.ər.i ˈbreɪk.θruː/

revolutionary breakthrough

descubrimiento revolucionario
Meaning
A sudden, dramatic, and important discovery or development that changes everything.
Example
Robotic surgery is a revolutionary breakthrough in healthcare.
La cirugía robótica es un descubrimiento revolucionario en la atención sanitaria.
C1 adjective /ˈhæloʊd/

hallowed

sagrado
Meaning
regarded as holy or greatly respected
Example
They walked across the hallowed halls of the old university.
Cruzaron los sagrados pasillos de la vieja universidad.
C1 adjective /fəˈnætɪk/

Fanatic

fanático
Meaning
extremely passionate about something; showing excessive enthusiasm or devotion
Example
He is a fanatic supporter of his football team.
Él es un fanático seguidor de su equipo de fútbol.
C1 noun/verb /brʊk/

brook

arroyo / tolerar
Meaning
As a noun: a small natural stream; As a verb: to tolerate or endure something
Example
The village was built near a clear brook.
La aldea fue construida cerca de un arroyo claro.
C1 noun /ɪmˈpɛdɪmənt/

impediments

obstáculos
Meaning
A hindrance or obstruction in doing something; things that prevent progress or achievement.
Example
Economic impediments often hinder social development.
Los obstáculos económicos a menudo dificultan el desarrollo social.
C1 noun /ʃəˈmiːz/

Chemise

camisa
Meaning
a woman's loose-fitting undergarment or dress hanging straight from the shoulders
Example
The vintage chemise was made of delicate lace and silk.
La camisa vintage estaba hecha de delicado encaje y seda.
C1 adjective /ˈtrænzvɜːrs/

transverse

transversal
Meaning
situated or lying across something
Example
The transverse road connects two highways.
La carretera transversal conecta dos autopistas.
C1 adjective /ˈreɪdiənt/

radiant

radiante
Meaning
Shining brightly; expressing great happiness.
Example
She looked radiant in her wedding dress.
Ella se veía radiante con su vestido de novia.
C1 verb /ˈsnɪkər/

snicker

reírse disimuladamente
Meaning
to laugh quietly in a disrespectful or mocking way
Example
The students snickered when the teacher made a mistake.
Los estudiantes se rieron cuando el maestro cometió un error.
C1 noun /ˈliːdʒən/

legion

un gran grupo de personas, especialmente soldados; un gran número
Meaning
a large group of people, especially soldiers; a great number
Example
The Roman army was divided into legions.
El ejército romano se dividió en legiones.
C1 adjective /ˈsʌlən/

sullen

gruñón
Meaning
bad-tempered and gloomy; silently resentful
Example
She gave him a sullen look and walked away.
Ella le dio una mirada gruñona y se fue.
C1 adjective /ˌaɪdiəˈlɪstɪk/

Idealistic

idealista
Meaning
pursuing high principles or ideals; unrealistically optimistic
Example
She has an idealistic view of changing the world.
Ella tiene una visión idealista de cambiar el mundo.
C1 verb /ˌriːˈkæl.ɪ.breɪt/

recalibrate

recalibrar, ajustar nuevamente
Meaning
To calibrate again or differently; to adjust or correct something based on new information or changed circumstances.
Example
The company had to recalibrate its strategies to adapt to the market.
La empresa tuvo que recalibrar sus estrategias para adaptarse al mercado.
C1 noun /ɒpˈtɒmətri/

optometry

optometría
Meaning
The practice or profession of examining the eyes and prescribing corrective lenses.
Example
She studied optometry at the university to become an eye specialist.
Estudió optometría en la universidad para convertirse en especialista en ojos.
C1 adjective /ˌɪməˈtɪəriəl/

immaterial

inmaterial
Meaning
Not important or relevant; lacking physical substance.
Example
The judge ruled that the argument was immaterial to the case.
El juez falló que el argumento no era relevante para el caso.
C1 noun /ˈdʒɔːn.dɪs/

jaundice

ictericia
Meaning
A medical condition in which the skin and eyes become yellow due to liver problems.
Example
The doctor diagnosed the baby with jaundice.
El doctor diagnosticó al bebé con ictericia.
C1 noun ˈtɑksɪk ɪˈmɪʃənz

toxic emissions

emisiones tóxicas
Meaning
Harmful or poisonous substances released into the environment, especially the atmosphere.
Example
Toxic emissions from vehicles pollute the atmosphere.
Las emisiones tóxicas de los vehículos contaminan la atmósfera.
C1 verb /ˈfɔːrfɪt/

forfeit

perder, renunciar como penalización
Meaning
to lose or give up something, usually as a penalty for wrongdoing
Example
He had to forfeit the match after breaking the rules.
Tuvo que perder el partido después de romper las reglas.
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 noun /ˈhaɪ.drəʊˌpaʊər ˌdʒen.əˈreɪ.ʃən/

hydropower generation

generación hidroeléctrica
Meaning
The production of electrical power through the use of the gravitational force of falling or flowing water.
Example
Hydropower generation promotes green energy.
La generación hidroeléctrica promueve la energía verde.
C1 adjective /ˌʌn.əˈdʌl.tə.reɪ.tɪd/

Unadulterated

puro
Meaning
not mixed or diluted with any different or extra elements; pure
Example
She felt unadulterated joy when she heard the news.
Sintió una alegría pura cuando escuchó la noticia.
C1 noun dʒəˈnɛt.ɪk ˌmɒd.ɪ.fɪˈkeɪ.ʃən

genetic modification

modificación genética
Meaning
The process of altering the genetic code of plants or animals.
Example
Genetic modification enhances crop resistance to pests and diseases.
La modificación genética mejora la resistencia de los cultivos a plagas y enfermedades.
C1 noun, adjective /ˌproʊlɪˈtɛəriən/

proletarian

proletario
Meaning
Relating to the working class, especially those who do not own property.
Example
The movement was rooted in proletarian struggles.
El movimiento estaba arraigado en las luchas proletarias.
C1 noun /əˈlʌmnəs/

alumnus

exalumno
Meaning
a former student or graduate of a school, college, or university
Example
He is an alumnus of Harvard University.
Él es un exalumno de la Universidad de Harvard.
C1 noun /ˈdʊr.i.ən/

Durian

durian
Meaning
a large spiky tropical fruit known for its strong smell and creamy custard-like flesh
Example
Durian is known as the king of fruits in Southeast Asia despite its pungent odor.
Durian es conocido como el rey de las frutas en el Sudeste Asiático a pesar de su olor penetrante.
C1 adjective /ədˈmɪsəbl/

admissible

admisible
Meaning
acceptable or valid, especially as evidence in a court of law
Example
The judge ruled that the document was admissible as evidence.
El juez dictaminó que el documento era admisible como prueba.
C1 noun /ˌdev.əˈtiː/

Devotee

devoto; seguidor
Meaning
a person who is very interested in and enthusiastic about someone or something
Example
As a devotee of classical music, she attended every concert in the city.
Como devota de la música clásica, asistió a cada concierto en la ciudad.
C1 noun dɪˌlɪb.əˈreɪ.ʃən

deliberation

deliberación
Meaning
Long and careful consideration or discussion.
Example
The agreement was finalized after much deliberation.
El acuerdo se finalizó después de mucha deliberación.
C1 noun /ˈsɪməli/

simile

símil
Meaning
A figure of speech involving the comparison of one thing with another using 'like' or 'as'.
Example
She used a simile to describe her eyes as bright as stars.
Ella usó un símil para describir sus ojos tan brillantes como las estrellas.
C1 noun /ˌɪnflɛksɪˈbɪlɪti/

inflexibility

inflexibilidad
Meaning
the quality of being rigid or unwilling to change; lack of adaptability
Example
The inflexibility of the rules caused unnecessary delays.
La inflexibilidad de las reglas causó retrasos innecesarios.
C1 adjective /ɪmˈpæsɪv/

impassive

impasible
Meaning
Not showing or feeling emotion; expressionless.
Example
Despite the shocking news, she remained impassive.
A pesar de las noticias impactantes, ella permaneció impasible.
C1 noun ˈvæljuː beɪst ˌɛdjuːˈkeɪʃən

value-based education

educación basada en valores
Meaning
Education that emphasizes moral principles and ethical values.
Example
Value-based education shapes moral character.
La educación basada en valores moldea el carácter moral.
C1 noun /ˈkʌl.ən.dər/

Colander

colador
Meaning
a bowl-shaped kitchen utensil with holes in it used for draining food such as pasta or rice
Example
She drained the pasta using a colander.
Ella drenó la pasta usando un colador.
C1 noun ˌvɜː.səˈtɪl.ɪ.ti

versatility

versatilidad
Meaning
Ability to adapt or be adapted to many different functions or activities; having many different skills.
Example
His versatility made him successful in multiple fields.
Su versatilidad lo hizo exitoso en múltiples campos.
C1 noun /ˈsteɪtəs kwoʊ/

status quo

status quo
Meaning
The existing state of affairs, especially regarding social or political issues.
Example
The government decided to maintain the status quo until further review.
El gobierno decidió mantener el status quo hasta una revisión posterior.
C1 noun /ˌɪnfɪˈdɛləti/

infidelity

infidelidad
Meaning
the act of being unfaithful to a spouse or partner
Example
Their marriage ended due to his infidelity.
Su matrimonio terminó debido a su infidelidad.
C1 verb /əkˈsɛntʃueɪt/

accentuate

acentuar
Meaning
to emphasize or make something more noticeable
Example
The lighting accentuated the beauty of the painting.
La iluminación acentuó la belleza de la pintura.
C1 verb /ʌnˈɜːθ/

unearth

desenterrar
Meaning
To dig up from the ground or to discover something hidden.
Example
Archaeologists unearthed ancient artifacts at the site.
Los arqueólogos desenterraron artefactos antiguos en el sitio.
C1 noun ˌsʌb.sɪ.dɪˈzeɪ.ʃən

subsidization

subsidio
Meaning
Financial assistance provided by government to make certain goods or services more affordable.
Example
Subsidization of agriculture helps farmers maintain crop production.
La subsidización de la agricultura ayuda a los agricultores a mantener la producción de cultivos.
C1 noun /ˈmɪl.ɪ.tənt/

Militant

militante
Meaning
A person who uses aggressive or violent methods to promote a political or social cause
Example
The militant group demanded immediate political reforms.
El grupo militante exigió reformas políticas inmediatas.
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 /ˌpæl.pɪˈteɪ.ʃən/

Palpitation

latido rápido, fuerte o irregular debido a agitación o una condición médica
Meaning
a noticeably rapid, strong, or irregular heartbeat due to agitation or medical condition
Example
She experienced palpitations before her job interview.
Ella experimentó palpitaciones antes de su entrevista de trabajo.