extensible
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C2 adjective /ɪkˈstɛnsəbl/

extensible

expansible
Meaning
able to be extended; capable of expansion.
Example
The software is designed to be extensible with new features.
El software está diseñado para ser expansible con nuevas funciones.
C2 adjective /ɛɡˈzɪɡjuəs/

exiguous

escaso
Meaning
small in amount; scanty or inadequate
Example
They survived on exiguous rations during the journey.
Sobrevivieron con raciones exiguas durante el viaje.
C2 noun /ɪkˈspiːdiənsi/

expediency

conveniencia
Meaning
the quality of being convenient and practical despite possibly being improper or immoral
Example
He acted out of political expediency rather than principle.
Actuó por conveniencia política más que por principio.
C2 verb /ɛnˈkɪndl/

enkindle

encender, inspirar
Meaning
to set on fire or inspire strong emotion
Example
The speech enkindled hope in the audience.
El discurso encendió la esperanza en la audiencia.
C2 noun /ˈɒnwiː/ or /ˈɑːnwiː/

ennui

aburrimiento
Meaning
A feeling of boredom, listlessness, or dissatisfaction arising from lack of excitement.
Example
After weeks of doing nothing, he sank into a deep sense of ennui.
Después de semanas sin hacer nada, cayó en un profundo aburrimiento.
C2 adjective /ɪˈlɪʒən/

elysian

celestial
Meaning
Relating to or characteristic of paradise; delightful and heavenly.
Example
They spent an elysian week on the quiet island.
Pasaron una semana celestial en la isla tranquila.
C2 noun /ɪˈlɪziəm/

elysium

elíseo
Meaning
A place or state of perfect happiness; in Greek mythology, the afterlife paradise.
Example
For her, the garden was a personal elysium.
Para ella, el jardín era un elíseo personal.
C2 noun /ɪˈluːʒən/

elusion

elusión
Meaning
The act of escaping or avoiding something, especially by cleverness or trickery.
Example
His constant elusion of responsibility frustrated his colleagues.
Su constante elusión de responsabilidad frustró a sus colegas.
C2 verb /ɪˈfɛktʃueɪt/

effectuate

efectuar
Meaning
to put into force or cause to happen; to bring about
Example
The manager effectuated the changes to improve efficiency.
El gerente efectuó los cambios para mejorar la eficiencia.
C2 adjective /ɪˈbʊliənt/

ebullient

exuberante
Meaning
cheerful and full of energy
Example
She was ebullient after receiving the good news.
Ella estaba exuberante después de recibir la buena noticia.
C2 noun /ɪɡˈzɛmplɑːr/

exemplar

ejemplo
Meaning
A model or pattern to be copied or imitated.
Example
She is an exemplar of kindness and generosity.
Ella es un ejemplo de amabilidad y generosidad.
C2 noun, adjective /ɪˈklɪptɪk/

ecliptic

eclíptica
Meaning
The apparent path of the sun across the sky; relating to eclipses or this path.
Example
The ecliptic is the plane of Earth's orbit around the Sun.
La eclíptica es el plano de la órbita de la Tierra alrededor del Sol.
C2 noun /ˌɛləˈkjuːʃn/

elocution

elocuencia
Meaning
The skill of clear and expressive speech, especially in public speaking.
Example
She improved her elocution through constant practice.
Ella mejoró su elocuencia mediante la práctica constante.
C2 noun /ˈiːɡlət/

eaglet

aguilucho
Meaning
A young eagle.
Example
The eaglet waited in the nest for its mother to return.
El aguilucho esperó en el nido a que su madre regresara.
C2 noun /juː/

Ewe

oveja hembra
Meaning
a female sheep
Example
The ewe gave birth to twin lambs.
La oveja dio a luz a corderos gemelos.
C2 verb /ɪˈmeɪʃieɪt/

emaciate

emaciar
Meaning
To make abnormally thin or weak, usually because of illness or lack of food.
Example
The prisoners were emaciated after months without proper food.
Los prisioneros se emaciaron después de meses sin comida adecuada.
C2 noun /ˈaɪ.sɔːr/

Eyesore

ultraje visual; cosa desagradable de ver
Meaning
something that is very ugly and unpleasant to look at
Example
The abandoned building has become an eyesore in the neighborhood.
El edificio abandonado se ha convertido en un ultraje visual en el vecindario.
C2 verb /ˈeksɔːrsaɪz/

exorcise

exorcizar
Meaning
To drive out an evil spirit or bad influence through rituals or prayers.
Example
The priest was called to exorcise the spirit from the house.
Se llamó al sacerdote para exorcizar el espíritu de la casa.
C2 adjective /ˈɛnərˌveɪtɪd/

enervated

agotado
Meaning
Lacking energy, vitality, or strength; weakened or exhausted.
Example
After the long meeting, she felt completely enervated.
Después de la larga reunión, se sintió completamente agotada.
C2 noun /ˈɛksɪdʒənsi/

exigency

urgencia
Meaning
an urgent need or demand requiring immediate attention
Example
In times of war, the exigency of the situation requires quick decisions.
En tiempos de guerra, la urgencia de la situación requiere decisiones rápidas.
C2 adverb /ˌɛkspəˈdɪʃəsli/

expeditiously

de manera rápida y eficiente
Meaning
in a quick and efficient manner
Example
The application was processed expeditiously.
La solicitud fue procesada de manera rápida y eficiente.
C2 adjective /ɛkˈstrɪnzɪk/

extrinsic

extrínseco
Meaning
Not part of the essential nature of someone or something; coming from outside.
Example
His motivation was largely extrinsic, driven by rewards and recognition.
Su motivación era en gran parte extrínseca, impulsada por recompensas y reconocimiento.
C2 verb /ɪˈfeɪsɪŋ/

effacing

borrar / hacerse invisible
Meaning
erasing or making oneself inconspicuous; to remove or diminish in significance
Example
She kept effacing herself during the meeting so that others could shine.
Ella siguió borrándose a sí misma durante la reunión para que los demás pudieran brillar.
C2 adjective /ˈɪrˌsplɪtɪŋ/

earsplitting

ensordecedor
Meaning
extremely loud or piercing sound
Example
The earsplitting noise of the fire alarm startled everyone.
El ensordecedor ruido de la alarma contra incendios sorprendió a todos.
C2 verb /ɪkˈspɒstjʊleɪt/

expostulate

expresar desacuerdo
Meaning
to express strong disapproval or disagreement
Example
She expostulated with her friend about the risky decision.
Ella expuso su desacuerdo con su amigo sobre la decisión arriesgada.
C2 noun /ˈɛskwaɪər/

esquire

esquire
Meaning
A title of respect often used after a man's name, especially for lawyers in the United States.
Example
John Smith, Esquire, will be representing the client in court.
John Smith, Esquire, representará al cliente en la corte.
C2 adjective /juːˈdʒɛnɪk/

eugenic

eugenésico
Meaning
Relating to or aiming at improving the genetic quality of a population.
Example
In the early 20th century, some scientists supported eugenic policies.
A principios del siglo XX, algunos científicos apoyaron las políticas eugenésicas.
C2 verb /ɪkˈspʌndʒ/

expunge

eliminar
Meaning
To erase or remove completely, often something unwanted.
Example
He managed to expunge the embarrassing memory from his mind.
Él logró eliminar el vergonzoso recuerdo de su mente.
C2 verb /ˈɛkspieɪt/

expiate

expiar
Meaning
to make amends for guilt or wrongdoing
Example
He tried to expiate his crime by helping the poor.
Él trató de expiar su crimen ayudando a los pobres.
C2 verb /ˈɛdɪfaɪ/

edify

edificar
Meaning
To instruct or improve someone morally or intellectually.
Example
Good books can both entertain and edify the reader.
Los buenos libros pueden entretener y edificar al lector.
C2 verb /ɛkˈskɔːrieɪt/

excoriate

criticar severamente
Meaning
To strongly criticize someone; to denounce severely.
Example
The critic excoriated the film for its poor script.
El crítico criticó severamente la película por su guion deficiente.
C2 noun /ˈɛpɪtɑːf/

epitaph

epígrafe
Meaning
A short text written on a tombstone in memory of the deceased.
Example
The gravestone bore an epitaph honoring the soldier’s bravery.
La lápida llevaba un epígrafe que honraba la valentía del soldado.
C2 adjective /ˌɛkjʊˈmɛnɪkəl/

ecumenical

unidad religiosa ecuménica
Meaning
Promoting unity among different Christian churches or religions.
Example
The leaders gathered for an ecumenical conference to encourage dialogue.
Los líderes se reunieron para una conferencia ecuménica para fomentar el diálogo.
C2 noun /ɪˈbʊliəns/

ebullience

exuberancia
Meaning
the quality of being cheerful, enthusiastic, and full of energy
Example
The teacher's ebullience inspired her students.
El entusiasmo de la profesora inspiró a sus estudiantes.
C2 adjective /ˌɛpɪkjʊˈriːən/

epicurean

epicurista
Meaning
relating to the enjoyment of fine food, drink, and luxury
Example
The chef prepared an epicurean feast for the guests.
El chef preparó un banquete epicurista para los invitados.
C2 noun /juːˈdʒen.ɪks/

eugenics

eugenesia
Meaning
the study or practice of improving the genetic quality of the human population
Example
Eugenics has been criticized for its unethical applications in history.
La eugenesia ha sido criticada por sus aplicaciones no éticas en la historia.
C2 verb /ɪnˈvaɪərən/

environ

rodear
Meaning
to surround or enclose; to encircle
Example
Mountains environ the small valley.
Las montañas rodean el pequeño valle.
C2 adjective ˈen.də.krɪn

endocrine

endocrino
Meaning
Relating to or denoting glands that secrete hormones directly into the blood.
Example
The endocrine system regulates metabolism and growth.
El sistema endocrino regula el metabolismo y el crecimiento.
C2 noun /ˈjuːər/

ewer

jarra
Meaning
a large jug with a wide mouth, especially used in the past for carrying water
Example
The servant filled the ewer with fresh water.
El sirviente llenó la jarra con agua fresca.
C2 adjective /ˌeθ.noʊˈsen.trɪk/

ethnocentric

etnocéntrico
Meaning
evaluating other cultures according to the standards of one's own culture
Example
His ethnocentric attitude made it hard for him to appreciate foreign traditions.
Su actitud etnocéntrica le dificultaba apreciar las tradiciones extranjeras.
C2 verb /ɪˈdjuːs/

educe

extraer
Meaning
To draw out or bring forth something latent or hidden.
Example
The teacher tried to educe a response from the shy student.
El maestro intentó inducir una respuesta del estudiante tímido.
C2 verb /ˈɛmɪt/

emmet

hormiga
Meaning
an ant; a small insect
Example
The emmet carried food to its nest.
La hormiga llevó comida a su nido.
C2 noun /ˈɪəri/

eyry

nido de ave rapaz
Meaning
an alternative spelling of eyrie; a nest of a bird of prey
Example
The falcon guarded its eyry fiercely.
El halcón protegió su nido ferozmente.
C2 verb /ɪnˈskɒns/

ensconce

acurrucarse, esconderse
Meaning
to settle comfortably or securely in a place; to hide or shelter firmly
Example
She ensconced herself in a cozy armchair by the fireplace.
Ella se enroscó en una cómoda silla junto a la chimenea.
C2 verb /ɪkˈspɛktəreɪt/

expectorate

expectorar
Meaning
to cough up and spit out mucus from the throat or lungs
Example
The patient began to expectorate thick mucus.
El paciente comenzó a expectorar mucosidad espesa.
C2 verb /ɪˈfjuːz/

effuse

derramar
Meaning
To pour out or express feelings freely and openly.
Example
She effused gratitude for the help she received.
Ella derramó gratitud por la ayuda que recibió.
C2 adjective /ˌɛlɪˈfæntaɪn/

elephantine

elefantino
Meaning
Huge, clumsy, or resembling an elephant in size or movement.
Example
The man moved with an elephantine grace.
El hombre se movió con una gracia elefantiina.
C2 verb /ˈɛksplɪkeɪt/

explicate

explicar
Meaning
to make an idea or principle clear by explaining it in detail
Example
The professor tried to explicate the theory of relativity for his students.
El profesor intentó explicar la teoría de la relatividad para sus estudiantes.
C2 noun /ɪɡˈzɔːrbɪtəns/

exorbitance

exorbitancia
Meaning
The quality of being excessive, unreasonable, or going beyond proper limits.
Example
The exorbitance of the hotel's prices shocked the tourists.
La exorbitancia de los precios del hotel sorprendió a los turistas.
C2 adjective /ˈɛrzæts/

ersatz

sustituto
Meaning
made or used as a substitute, typically an inferior one
Example
The cheap shoes were made of ersatz leather.
Los zapatos baratos estaban hechos de cuero sintético.
C2 noun /ˈɛpəlɛt/

epaulette

aditamento de hombro
Meaning
A variant spelling of epaulet, also meaning a shoulder ornament, especially on military uniforms.
Example
The officer’s epaulette shone brightly under the sunlight.
La epauleta del oficial brillaba bajo la luz del sol.
C2 adjective /ˈɛkstənt/

extant

existente
Meaning
Still in existence; surviving.
Example
Only a few manuscripts from the ancient library are extant.
Solo unos pocos manuscritos de la antigua biblioteca están extintos.
C2 noun /ˌɛfəˈvɛsəns/

effervescence

efervescencia
Meaning
The release of gas bubbles; vivacity or high-spiritedness.
Example
Her effervescence made her the life of the party.
Su efervescencia la hizo la vida de la fiesta.
C2 adjective /ˌɛl.ɪˈdʒaɪ.ək/

elegiac

elegíaco
Meaning
Expressing sorrow, often for something past; resembling an elegy.
Example
The novel ends on an elegiac note, mourning the lost era.
La novela termina con una nota elegíaca, lamentando la era perdida.
C2 verb /ɪˈspaɪ/

espy

ver
Meaning
To catch sight of or notice something, especially from a distance.
Example
From the hilltop, she espied a small village in the valley.
Desde la cima de la colina, ella divisó un pequeño pueblo en el valle.
C2 adjective /ˈɛksɪdʒənt/

exigent

urgente
Meaning
demanding immediate action or attention; urgent
Example
The patient’s exigent condition required immediate surgery.
La condición exigente del paciente requirió cirugía inmediata.
C2 adjective /ˌɛfəˈvɛsənt/

effervescent

efervescente
Meaning
Giving off bubbles; lively, enthusiastic, and full of energy.
Example
She had an effervescent personality that brightened every room.
Ella tenía una personalidad efervescente que iluminaba cada habitación.
C2 verb /ɪˈmæskjʊleɪt/

emasculate

emascolar
Meaning
To make someone weaker or less effective; to deprive of strength or vigor.
Example
The constant criticism emasculated his confidence.
La crítica constante emasculó su confianza.
C2 verb /ˈeksɪkreɪt/

execrate

despreciar
Meaning
To feel or express great loathing or hatred for something.
Example
The community execrated the corrupt politician.
La comunidad despreciaba al político corrupto.
C2 noun /ˈɛpənɪm/

eponym

persona de la que se toma el nombre
Meaning
A person after whom a discovery, invention, place, or other thing is named.
Example
Sandwich is an eponym named after the Earl of Sandwich.
Sándwich es un epónimo nombrado en honor al Conde de Sándwich.
C2 verb /ɪnˈræptʃər/

enrapture

fascinar
Meaning
To fill someone with great delight or joy.
Example
The beautiful music enraptured the audience.
La hermosa música fascinó a la audiencia.
C2 noun /ɪˌkwɪvəˈkeɪʃən/

equivocation

uso de lenguaje ambiguo
Meaning
The use of ambiguous language to conceal the truth or to avoid committing oneself.
Example
The politician’s equivocation frustrated voters who wanted a clear answer.
La equivocación del político frustró a los votantes que querían una respuesta clara.
C2 adjective /ɪˈfɛktʃuəl/

effectual

efectivo
Meaning
producing a desired or intended effect, often used in formal contexts
Example
Her effectual efforts brought peace to the community.
Sus esfuerzos efectivos trajeron paz a la comunidad.
C2 noun /ɪˈmɒljʊmənt/

emolument

salario
Meaning
payment for work or services; salary or fees
Example
The professor received his annual emolument from the university.
El profesor recibió su salario anual de la universidad.
C2 noun /ɪˈfʌldʒəns/

effulgence

resplandor
Meaning
Brilliant radiance or shining brightness.
Example
The effulgence of the sunrise lit up the entire valley.
El resplandor del amanecer iluminó todo el valle.
C2 verb /ˈɛnərˌveɪt/

enervate

debilitar
Meaning
To weaken or drain someone of strength or vitality.
Example
The long hours of work enervated him.
Las largas horas de trabajo lo debilitaron.
C2 noun /ˌɛpɪˈdɜːrmɪs/

epidermis

capa externa de la piel
Meaning
the outer layer of cells covering the body of an organism, especially the skin
Example
The epidermis protects the body from harmful bacteria.
El epidérmis protege el cuerpo de las bacterias dañinas.
C2 noun /ˈɛnsaɪn/

ensign

bandera
Meaning
A flag or standard, especially a military or naval one indicating nationality; also a junior officer in the navy or coast guard.
Example
The ship raised its national ensign before leaving the harbor.
El barco izó su bandera nacional antes de salir del puerto.
C2 noun /ɪkˌsprəʊ.priˈeɪ.ʃən/

expropriation

expropiación
Meaning
The act of government taking private property, also known as confiscation, nationalization, or seizure.
Example
The land expropriation led to disputes among landowners.
La expropiación de tierras llevó a disputas entre los propietarios de tierras.
C2 verb /ɛmˈbleɪzən/

emblazon

adornar de manera destacada
Meaning
To decorate or display something in a noticeable or impressive way.
Example
The team's logo was emblazoned on their uniforms.
El logotipo del equipo estaba emblemazado en sus uniformes.
C2 verb /ɪnˈtræp/

entrap

atrapar
Meaning
To catch or trick someone into a difficult situation.
Example
The police tried to entrap the criminal with false evidence.
La policía intentó atrapar al criminal con pruebas falsas.
C2 noun /ˈɪəri/

eyrie

nido de águila
Meaning
the nest of a bird of prey, such as an eagle, typically built high on a cliff or tree
Example
The eagle’s eyrie was perched high on the mountain cliff.
El nido de águila estaba ubicado en la cima de un acantilado de montaña.
C2 noun /ɪksˈtʃɛkər/

exchequer

tesorería
Meaning
The treasury of a state or country.
Example
The government announced new measures to improve the exchequer.
El gobierno anunció nuevas medidas para mejorar la tesorería.
C2 adverb /ɪkˈstem.pɔːr/

Extempore

espontáneo; improvisado
Meaning
without preparation; spontaneously; improvised
Example
The speaker delivered an impressive extempore speech at the conference.
El orador dio un impresionante discurso extemporáneo en la conferencia.
C2 adjective /ɪˈkwɪvəkəl/

equivocal

ambiguo
Meaning
Open to more than one interpretation; ambiguous.
Example
His equivocal answer confused everyone.
Su respuesta ambigua confundió a todos.
C2 verb /ˌɛvəˈnɛs/

evanesce

desvanecerse
Meaning
To disappear gradually; to fade away.
Example
The mist began to evanesce as the sun rose higher.
La niebla comenzó a desvanecerse a medida que el sol subía más alto.
C2 noun /ɛmˈpɔːriəm/

emporium

gran tienda
Meaning
A large retail store selling a wide variety of goods.
Example
They visited the new emporium to buy furniture and home decor.
Visitaron el nuevo empórium para comprar muebles y decoración para el hogar.
C2 noun /ˈɛdi/

eddy

remolino
Meaning
A circular movement of water, air, or smoke, counter to the main current, causing a small whirlpool or turbulence.
Example
The canoe was caught in an eddy near the rocks.
La canoa quedó atrapada en un remolino cerca de las rocas.
C2 noun /ɪˌnʌn.siˈeɪ.ʃən/

enunciation

enunciación, pronunciación clara
Meaning
The act of saying or pronouncing words clearly and distinctly.
Example
His enunciation was clear during the presentation.
Su enunciación fue clara durante la presentación.
C2 noun /ˈɛndaɪv/ or /ˈɑːndɪv/

endive

endivia
Meaning
A leafy vegetable belonging to the chicory family, often used in salads.
Example
She added fresh endive to the salad for a slightly bitter flavor.
Añadió endivia fresca a la ensalada para darle un sabor ligeramente amargo.
C2 adjective /ɪˈmɛrɪtəs/

emeritus

emerito honorario
Meaning
having retired but allowed to retain their title as an honor
Example
He is a professor emeritus at the university.
Él es un profesor emérito en la universidad.
C2 noun /ˈɛpɪkjʊr/

epicure

epicúreo
Meaning
A person who enjoys fine food and drink, often with refined taste.
Example
As an epicure, she always sought out the finest restaurants in the city.
Como epicúreo, siempre buscaba los mejores restaurantes de la ciudad.
C2 noun /ɪnˈtriːti/

entreaty

súplica
Meaning
An earnest or humble request or plea.
Example
She made an entreaty for peace during the heated argument.
Ella hizo una súplica por la paz durante la acalorada discusión.
C2 noun /ˈɛmbəˌlɪzəm/

embolism

émbolismo
Meaning
the sudden blockage of a blood vessel by a clot or other foreign matter
Example
The patient suffered a fatal pulmonary embolism.
El paciente sufrió un émbolismo pulmonar fatal.
C2 noun /ˈɛksplətɪv/

expletive

palabra ofensiva
Meaning
a word or phrase used as an exclamation, often offensive or profane
Example
He shouted an expletive when he dropped the hammer on his foot.
Él gritó una palabra ofensiva cuando dejó caer el martillo sobre su pie.
C2 verb /ɛksˈhjuːm/

exhume

exhumar
Meaning
to dig out something buried, especially a body from the ground
Example
The archaeologists decided to exhume the ancient remains.
Los arqueólogos decidieron exhumar los restos antiguos.
C2 verb /ɪˈvɪsəˌreɪt/

eviscerate

eviscerar, destruir
Meaning
to remove the internal organs of; to deprive of essential content
Example
The critics eviscerated the movie for its weak storyline.
los críticos destruyeron la película por su débil historia.
C2 noun /ˌɛmjʊˈleɪ.ʃən/

emulation

emulación
Meaning
Reproducing something or following someone to achieve success.
Example
The software allows the emulation of old video games on modern devices.
El software permite la emulación de juegos antiguos en dispositivos modernos.
C2 noun /ɪkˈstɛnsər/

extensor

músculo extensor
Meaning
a muscle that serves to extend or straighten a limb or part of the body.
Example
The extensor muscles in the arm help straighten the elbow.
Los músculos extensores en el brazo ayudan a enderezar el codo.
C2 noun /ɛθˈnɒlədʒi/

ethnology

etnología
Meaning
the study of the characteristics of different peoples and the differences and relationships between them
Example
She specialized in ethnology to better understand cultural diversity.
Ella se especializó en etnología para entender mejor la diversidad cultural.
C2 noun /ˌiː.mɛnˈdeɪ.ʃən/

emendation

enmendadura
Meaning
a correction or improvement made to a text
Example
The article required several emendations before it was ready for print.
El artículo requirió varias enmiendas antes de estar listo para imprimir.
C2 adjective /ˈɛrənt/

errant

errante
Meaning
behaving wrongly or straying from the proper course or standards
Example
The teacher disciplined the errant student.
El maestro disciplinó al estudiante errante.
C2 adjective /ˌɛsəˈtɛrɪk/

esoteric

esotérico
Meaning
intended for or understood by only a small number of people with special knowledge
Example
The professor gave an esoteric lecture on ancient philosophy.
El profesor dio una conferencia esotérica sobre filosofía antigua.
C2 adjective /ˌjuːləˈdʒɪstɪk/

eulogistic

elogioso
Meaning
Expressing praise or admiration, often formally.
Example
The speaker gave a eulogistic account of the leader’s achievements.
El orador dio una descripción elogiosa de los logros del líder.
C2 noun /ˈjuːfəni/

euphony

eufonía
Meaning
The quality of being pleasing to the ear, especially through harmonious combination of words.
Example
The orator's speech was full of euphony and rhythm.
El discurso del orador estuvo lleno de eufonía y ritmo.
C2 verb /ɛksˈproʊprieɪt/

expropriate

expropiar
Meaning
To take property from its owner, especially by authority or for public use.
Example
The government decided to expropriate the land for a new highway.
El gobierno decidió expropiar la tierra para una nueva carretera.
C2 noun /ɪˈfɛmɪnəsi/

effeminacy

efeminidad
Meaning
The quality of showing traits traditionally associated with women, such as delicacy or softness.
Example
In ancient times, effeminacy was often criticized as a sign of weakness.
En tiempos antiguos, la efeminidad a menudo era criticada como signo de debilidad.
C2 adjective /ˌɛkspəˈdɪʃəs/

expeditious

rápido
Meaning
Done with speed and efficiency.
Example
The expeditious delivery of the package was appreciated.
La entrega rápida del paquete fue apreciada.
C2 noun /ɪkˈskrɛsəns/

excrescence

crecimiento anómalo
Meaning
An abnormal outgrowth or lump, often considered unattractive.
Example
The building was considered an excrescence on the landscape.
El edificio fue considerado una excrescencia en el paisaje.
C2 adjective /ˈeksɪkrəbl/

execrable

execrable
Meaning
Extremely bad or unpleasant.
Example
The movie was so execrable that many people left the theater early.
La película era tan execrable que muchas personas se fueron temprano del cine.
C2 verb /ɪnˈtriːt/

entreat

rogar
Meaning
To ask earnestly or beg someone to do something.
Example
She entreated him to stay a little longer.
Ella le rogó que se quedara un poco más.
C2 noun /ɪˈskʌtʃən/

escutcheon

escudo o emblema con un escudo de armas
Meaning
a shield or emblem bearing a coat of arms
Example
The family crest was displayed on the escutcheon above the fireplace.
El emblema familiar estaba exhibido en el escudo sobre la chimenea.
C2 verb /ɪkˈstɛmpəraɪz/

extemporize

improvisar
Meaning
To speak or perform without preparation; improvise.
Example
The actor had to extemporize when he forgot his lines.
El actor tuvo que improvisar cuando olvidó sus líneas.
C2 noun /ˈiːən/

eon

era
Meaning
an indefinitely long period of time; an age
Example
Dinosaurs lived millions of years ago, in a different eon.
Los dinosaurios vivieron hace millones de años, en una era diferente.
C2 noun /ˌiː.kəʊ.tɒkˈsɪ.kə.lə.dʒi/

ecotoxicology

ecotoxicología
Meaning
The study of the effects of chemical pollution on the environment.
Example
Ecotoxicology studies the effects of pesticides on wildlife.
La ecotoxicología estudia los efectos de los pesticidas en la vida silvestre.
C2 noun /ˌiː.tiˈɒ.lə.dʒi/

etiology

etiología
Meaning
the cause or origin of a disease or condition
Example
Doctors are studying the etiology of the new virus.
Los médicos están estudiando la etiología del nuevo virus.
C2 adjective /ˈɛksplɪkəbəl/

explicable

explicable
Meaning
able to be explained or understood
Example
His sudden anger was explicable given the stressful situation.
Su enojo repentino fue explicable dada la situación estresante.
C2 verb /ɪnˈtwaɪn/

entwine

enredar
Meaning
to twist or wind together; to become closely connected or involved
Example
The vines entwine around the old fence.
Las enredaderas se enrollan alrededor de la vieja cerca.
C2 noun ˈɛn.ɡræm

Engram

Señales físicas en el cerebro para el almacenamiento y recuperación de recuerdos
Meaning
Physical signs or patterns in the brain for memory storage and retrieval
Example
Scientists study engrams to understand how memories are stored.
Los científicos estudian los engramas para comprender cómo se almacenan los recuerdos.
C2 verb /ɪˈstreɪndʒ/

estrange

alienar
Meaning
to cause someone to no longer be close or affectionate; to alienate
Example
His constant criticism began to estrange him from his friends.
Su constante crítica comenzó a alejarlo de sus amigos.
C2 noun /ɪˌlɛkˈtrɑː.lə.sɪs/

electrolysis

electrólisis
Meaning
A chemical decomposition produced by passing an electric current through a liquid or solution.
Example
Electrolysis is used to separate hydrogen from water.
Se utiliza la electrólisis para separar el hidrógeno del agua.
C2 noun /ˈɛpɪɡræm/

epigram

epigrama
Meaning
A short, witty saying or poem that expresses an idea in a clever way.
Example
Oscar Wilde was famous for his sharp epigrams.
Oscar Wilde fue famoso por sus agudos epigramas.
C2 verb /ɛnˈdʒɔɪn/

enjoin

ordenar, prohibir
Meaning
to instruct or urge someone to do something; to prohibit legally
Example
The judge enjoined the company from continuing its activities.
El juez prohibió a la empresa continuar con sus actividades.
C2 noun /ɪˈfrʌntəri/

effrontery

descaro o audacia ruda
Meaning
shameless or rude boldness
Example
He had the effrontery to lie even when caught red-handed.
Él tuvo el descaro de mentir incluso cuando lo atraparon con las manos en la masa.
C2 noun /juːˌtrɑː.fɪˈkeɪ.ʃən/

eutrophication

exceso de nutrientes en un lago o cuerpo de agua
Meaning
Excessive richness of nutrients in a lake or other body of water, frequently due to runoff from the land, which causes a dense growth of plant life and death of animal life from lack of oxygen.
Example
Excess fertilizers lead to eutrophication in lakes.
Los fertilizantes excesivos provocan la eutrofización en los lagos.
C2 adjective /ɪˈfiːt/

effete

débiles
Meaning
Lacking vitality, strength, or effectiveness; weak and overrefined.
Example
The empire became effete after centuries of indulgence.
El imperio se volvió débil después de siglos de indulgencia.
C2 noun /ɪkˈsɪʒən/

excision

excisón
Meaning
the act of cutting something out, especially by surgical removal
Example
The excision of the infected tissue prevented further complications.
La excisión del tejido infectado previno complicaciones adicionales.
C2 noun /ɛnˈsɪklɪkəl/

encyclical

Carta encíclica
Meaning
a formal letter sent by the Pope to Catholic churches, usually addressing important issues
Example
The Pope issued an encyclical on climate change and moral responsibility.
El Papa emitió una carta encíclica sobre el cambio climático y la responsabilidad moral.
C2 adjective /ˌɛkstrəˌdʒuːˈdɪʃəl/

extrajudicial

extrajudicial
Meaning
done outside the authority of the legal system or judicial process
Example
The activists condemned the extrajudicial killings.
Los activistas condenaron los asesinatos extrajudiciales.
C2 noun/adjective /ɪˈmɒliənt/

emollient

sustancia que suaviza la piel
Meaning
a substance that softens or soothes the skin
Example
She used an emollient cream to treat her dry skin.
Ella usó una crema emoliente para tratar su piel seca.
C2 noun /ɪˈmɛtɪk/

emetic

emético
Meaning
a substance that causes vomiting
Example
The doctor administered an emetic to remove the poison.
El doctor administró un emético para eliminar el veneno.