efficacy
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C1 noun /ˈɛf.ɪ.kə.si/

efficacy

Meaning
The ability to produce a desired or intended result; effectiveness.
Example
The efficacy of the vaccine has been proven in trials.
C1 adjective /ɪˈspeʃəl/

especial

Meaning
Particularly remarkable or significant; distinguished from others
Example
This is an especial opportunity you should not miss.
C1 noun /ɪkˈstrɛmɪti/

extremity

Meaning
The farthest point or limit of something; a severe or extreme condition.
Example
He was pushed to the extremity of his patience.
C1 noun /ˈɛləkwəns/

eloquence

Meaning
Fluent or persuasive speaking or writing.
Example
His eloquence in speech won him great respect.
C1 noun /ˈiːkwɪnɒks/

equinox

Meaning
The time or date when day and night are of equal length, occurring twice a year.
Example
The spring equinox marks the beginning of longer days.
C1 verb /ɪˈspaʊz/

espouse

Meaning
To adopt or support a cause, belief, or way of life.
Example
She espoused the philosophy of nonviolence throughout her career.
C1 noun /ˈek.saɪl/

Exile

Meaning
the state of being barred from one's native country; enforced removal from one's homeland
Example
The political leader was forced into exile after the military coup.
C1 noun ˈiːkəʊˌsɪstəm ˈsɜːvɪsɪz

ecosystem services

Meaning
The benefits people obtain from ecosystems.
Example
Forests provide valuable ecosystem services, such as purifying air and water.
C1 noun ɪnˌvaɪ.rənˈmen.təl ˌtræns.fəˈmeɪ.ʃən

environmental transformation

Meaning
A significant change in environmental conditions or ecological systems.
Example
The city demonstrates environmental transformation.
C1 verb /ɪnˈdaʊ/

endow

Meaning
To provide with a quality, ability, or gift; to donate funds for a purpose.
Example
The university was endowed with a generous donation.
C1 noun /ˌɛksɪˈkjuːʃənər/

executioner

Meaning
A person who carries out a death sentence by execution.
Example
The executioner prepared the gallows for the condemned prisoner.
C1 adjective /ˈɜːrθi/

earthy

Meaning
resembling or suggestive of earth or soil; simple, natural, and sometimes coarse
Example
The dish had a rich, earthy flavor from the mushrooms.
C1 noun /ɪnˈdɪrmənt/

endearment

Meaning
A word or phrase expressing affection or love.
Example
She whispered a gentle endearment to her child.
C1 adjective /ɪˈklɛktɪk/

eclectic

Meaning
Selecting or deriving ideas, styles, or tastes from a broad and diverse range of sources.
Example
Her taste in music is eclectic, ranging from classical to hip-hop.
C1 verb /ɪɡˈzuːd/

exude

Meaning
to display a quality strongly and openly; to release a liquid or smell slowly
Example
He exudes confidence whenever he speaks in public.
C1 verb /ˈɛkˌsaɪz/

excise

Meaning
to cut out or remove completely, often by surgery
Example
The surgeon excised the tumor successfully.
C1 adjective /ɪnˈɡreɪnd/

engrained

Meaning
Firmly fixed or established; difficult to change.
Example
Cultural practices are often deeply engrained in the fabric of society.
C1 verb /ɪnˈtʃænt/

enchant

Meaning
to delight or charm greatly; to cast a spell over
Example
The storyteller enchanted the children with his tales.
C1 verb /ɪˈkɒnəmaɪz/

economize

Meaning
To reduce spending or use resources carefully.
Example
Families are trying to economize by cutting unnecessary expenses.
C1 verb /ɪmˈboʊl.dən/

embolden

Meaning
To give someone the courage or confidence to do something.
Example
The coach's words emboldened the team to play aggressively.
C1 noun /ɪmˈbɑː.ɡoʊ/

embargo

Meaning
A trade ban, restriction, or prohibition imposed by a government or international organization on a country.
Example
The UN imposed an embargo on arms exports.
C1 verb ɪɡˈzæsərbeɪt

exacerbate

Meaning
To make a problem, bad situation, or negative feeling worse.
Example
Climate change exacerbates flooding issues.
C1 verb /ɪˈdʒektɪd/

ejected

Meaning
to force someone or something to leave a place; to push or throw something out forcefully
Example
The pilot was ejected from the aircraft during the emergency.
C1 adjective /ɪˈvɒkətɪv/

evocative

Meaning
bringing strong images, memories, or feelings to mind
Example
The music was evocative of her childhood memories.
C1 noun /ˈɒntreɪ/ (UK), /ˈɑːntreɪ/ (US)

entree

Meaning
The main course of a meal (US); the right to enter or access (formal).
Example
The restaurant’s signature steak was served as the main entree.
C1 noun ˈiː.pɒk

epoch

Meaning
A period of time in history or a person's life, typically one marked by notable events or particular characteristics.
Example
The invention of the internet marked a new epoch in human history.
C1 verb /ɪnˈtaɪs/

entice

Meaning
to attract or tempt someone by offering something appealing
Example
The advertisement was designed to entice customers into the store.
C1 adjective /ɪkˈstætɪk/

ecstatic

Meaning
Feeling or expressing overwhelming happiness or excitement.
Example
The fans were ecstatic after their team won the championship.
C1 noun /ˌekspəˈzɪʃən/

exposition

Meaning
a detailed explanation or a large public exhibition
Example
The scientist gave a clear exposition of the theory.
C1 verb /ɪˈnjuːməˌreɪt/

enumerate

Meaning
to mention things one by one; to list or count
Example
She enumerated the reasons for her decision.
C1 noun /ˈɛstjʊəri/

estuary

Meaning
the tidal mouth of a large river, where the tide meets the stream
Example
The city is located near the estuary of the river.
C1 adjective /ˈen.vi.ə.bəl/

Enviable

Meaning
causing envy; desirable
Example
Her success was enviable among her peers.
C1 noun /ɪkˈskriːʃən/

excretion

Meaning
the process of eliminating waste matter from the body
Example
Excretion is vital for maintaining a healthy body.
C1 noun /ɪˌlæbəˈreɪʃən/

elaboration

Meaning
the process of adding more detail or expanding on something
Example
The teacher appreciated the student's elaboration of the topic.
C1 verb /ɪˈvɪkt/

evict

Meaning
To expel someone from a property, usually by legal process.
Example
The landlord decided to evict the tenants for not paying rent.
C1 adjective /ɪˈrɒtɪk/

erotic

Meaning
relating to or tending to arouse sexual desire or excitement
Example
The novel contained several erotic scenes.
C1 adjective /ɪˈluːsɪv/

elusive

Meaning
Difficult to find, catch, or achieve; hard to understand or define.
Example
The solution to the problem proved elusive.
C1 adjective ɛnˈdɛm.ɪk

endemic

Meaning
Native and restricted to a certain place.
Example
The Bengal tiger is endemic to the Indian subcontinent.
C1 noun ɪɡˌzæs.pəˈreɪ.ʃən

exasperation

Meaning
Extreme irritation or frustration.
Example
He sighed in exasperation after hearing the same excuse again.
C1 noun /ɪˈleɪʃən/

elation

Meaning
A feeling of great happiness and excitement.
Example
His elation was evident after winning the championship.
C1 adjective /ɪɡˈzæktɪŋ/

exacting

Meaning
demanding a lot of effort, attention, or precision
Example
She is known for her exacting standards in design.
C1 verb /ɪnˈʃraɪn/

enshrine

Meaning
to preserve or cherish something as sacred or important
Example
The constitution enshrines the right to freedom of speech.
C1 noun ɪˈveɪ.ʒən

evasion

Meaning
The practice of avoiding or escaping from something, especially responsibility or duty.
Example
His evasion of responsibilities frustrated his colleagues.
C1 adjective /ɪˈleɪtɪd/

elated

Meaning
Extremely happy and excited.
Example
She was elated when she heard the good news.
C1 verb /ɪˈmænsɪpeɪt/

emancipate

Meaning
to set someone free from legal, social, or political restrictions; to liberate from slavery or oppression
Example
The law was designed to emancipate slaves and grant them full citizenship.
C1 noun /ˈɪrˌplʌɡ/

earplug

Meaning
a device inserted into the ear to block out noise or water
Example
He wore earplugs to sleep during the noisy night.
C1 adjective /ˌɛvərˈlæstɪŋ/

everlasting

Meaning
Lasting forever or for an indefinitely long time.
Example
The poet wrote about his everlasting love for nature.
C1 verb /ɪkˈstɪŋ.ɡwɪʃ/

extinguish

Meaning
to put out a fire, light, or to end something
Example
The firefighters managed to extinguish the blaze within an hour.
C1 verb ɪɡˈzɛm.plɪ.faɪ

exemplify

Meaning
To be a typical example of or to illustrate something clearly, to show as an example or demonstrate.
Example
His dedication exemplifies true leadership.
C1 verb /ɪnˈθrɔːl/

enthrall

Meaning
to captivate or hold someone’s attention completely
Example
The magician’s tricks enthralled the children.
C1 noun /ˌiː.kwɪˈlɪb.ri.əm/

equilibrium

Meaning
A state of physical balance or stability in physical, mental, or economic conditions.
Example
The market reached an equilibrium between supply and demand.
C1 verb /ɪkˈskriːt/

excrete

Meaning
to eliminate waste matter from the body
Example
Humans excrete carbon dioxide through breathing.
C1 verb /ˈiːkwəlaɪz/

equalize

Meaning
To make equal or level in status, value, or amount.
Example
The team equalized the score in the last minute.
C1 verb /ɪnˈɡʌlf/

engulf

Meaning
to completely surround or cover something or someone
Example
The village was engulfed by floodwaters.
C1 adjective /ɪˈstreɪndʒd/

estranged

Meaning
no longer close or affectionate with someone; alienated
Example
She felt estranged from her family after the long dispute.
C1 adjective /ɪkˈspænsɪv/

expansive

Meaning
covering a wide area or having a wide range of ideas or emotions
Example
They enjoyed the expansive view from the hilltop.
C1 adjective /ɪˈlɪptɪkl/

elliptical

Meaning
Having the shape of an ellipse; also, a style of speech that is concise and sometimes obscure.
Example
The planet follows an elliptical orbit around the sun.
C1 noun /ɪnˈkrəʊtʃmənt/

encroachment

Meaning
the act of gradually intruding or taking over someone’s rights, land, or space
Example
The villagers protested against the encroachment on their farmland.
C1 verb /ɪˈleɪt/

elate

Meaning
To make someone very happy or proud.
Example
The success of the project elated the whole team.
C1 adjective /ɪɡˈzɔːr.bɪ.tənt/

exorbitant

Meaning
Unreasonably high in price or cost; excessive.
Example
The hotel charged an exorbitant price for a basic room.
C1 noun /ɪˈnɔːrmɪti/

enormity

Meaning
The extreme scale, seriousness, or extent of something perceived as bad or morally wrong.
Example
The enormity of the crime shocked the entire community.
C1 verb /ɪˈlɛktrɪfaɪ/

electrify

Meaning
to charge with electricity; to excite or thrill intensely
Example
The speaker's speech electrified the audience.
C1 adjective /ɪɡˈzɪləreɪtɪd/

exhilarated

Meaning
feeling very happy, animated, or elated
Example
She felt exhilarated after finishing the marathon.
C1 adjective /ɪnˈlaɪ.tənd/

Enlightened

Meaning
having or showing a rational, modern outlook; having spiritual knowledge or understanding
Example
The enlightened teacher shared wisdom with all her students.
C1 adjective /ˈɜːrθ.li/

Earthly

Meaning
relating to the earth or human life; worldly; material rather than spiritual
Example
He focused on earthly pleasures rather than spiritual growth.
C1 noun /ɪˈnɪɡ.mə/

enigma

Meaning
A person or thing that is mysterious, puzzling, or difficult to understand.
Example
Life remains an enigma to many.
C1 adjective /ˈevər ˈlæstɪŋ/

Ever-lasting

Meaning
eternal; permanent; enduring forever
Example
Their love is ever-lasting and will never fade.
C1 adjective /ɪkˈspiːdiənt/

expedient

Meaning
suitable or convenient for achieving a particular end, sometimes at the expense of morality
Example
It was expedient to take the shortcut despite the risks.
C1 verb /ɪnˈθjuːz/

enthuse

Meaning
to express excitement or admiration
Example
She enthused about her trip to Italy.
C1 verb /ɪnˈreɪdʒ/

enrage

Meaning
To make someone extremely angry.
Example
His unfair remarks enraged the audience.
C1 adjective, verb /ɪɡˈzɛmpt/

exempt

Meaning
Free from an obligation or liability imposed on others.
Example
Students with high grades are exempt from the final exam.
C1 adjective ɪkˈskwɪzɪt

exquisite

Meaning
Extremely beautiful and delicate.
Example
The exquisite craftsmanship of the watch made it a collector's item.
C1 noun /ˈek.stə.si/

Ecstasy

Meaning
an overwhelming feeling of great happiness or joyful excitement
Example
She was in complete ecstasy when she heard the good news.
C1 verb /ˈɛkskəˌveɪt/

excavate

Meaning
to dig out or remove earth carefully, often for building or archaeological purposes
Example
The workers excavated the site to prepare for construction.
C1 adjective /ˈɜːr.θən/

Earthen

Meaning
made of earth or clay; relating to pottery or ceramic materials
Example
The kitchen had beautiful earthen pots for storage.
C1 noun /ɪmˈbɛzlmənt/

embezzlement

Meaning
The act of dishonestly taking money or property entrusted to one's care.
Example
The accountant was arrested for embezzlement of company funds.
C1 noun /ˈiːɡoʊɪst/

egoist

Meaning
A person who is excessively concerned with themselves; someone who believes in or practices egoism.
Example
She avoided him because he was a selfish egoist.
C1 adjective /ɪkˈsaɪtəbl̩/

excitable

Meaning
easily excited or emotionally aroused
Example
The child was excitable and laughed at every small thing.
C1 adjective /ɪˈɡriːdʒəs/

egregious

Meaning
Outstandingly bad; shocking.
Example
The company was fined for its egregious safety violations.
C1 noun /ˌjuːθəˈneɪʒə/

euthanasia

Meaning
The practice of intentionally ending a life to relieve pain and suffering.
Example
The debate about euthanasia raises difficult ethical questions.
C1 noun/verb /ɪˈstiːm/

esteem

Meaning
Respect and admiration, typically for a person.
Example
She is held in high esteem by her colleagues.
C1 noun ɪˌlæˈstɪs.ə.ti

elasticity

Meaning
The responsiveness of demand or supply to changes in price.
Example
The elasticity of demand for luxury goods is high.
C1 verb /iːk/

eke

Meaning
to make a small amount of something last longer by using it sparingly
Example
The family tried to eke out their savings during the tough months.
C1 noun ɪˌræd.ɪˈkeɪ.ʃən

eradication

Meaning
The complete destruction or elimination of something unwanted.
Example
Carbon eradication is a key goal of the project.
C1 noun /ɛkˈspeɪtriət/

expatriate

Meaning
a person who lives outside their native country
Example
Many expatriates gather in the city’s international community.
C1 noun /ˌɛkstrəˈdɪʃən/

extradition

Meaning
the official process of sending someone accused of a crime to another country or state
Example
The extradition of the suspect was delayed due to legal issues.
C1 adjective /ɪˈstiːmd/

Esteemed

Meaning
respected and admired; held in high regard
Example
He is an esteemed professor at the university.
C1 noun /ɪˌmæn.sɪˈpeɪ.ʃən/

Emancipation

Meaning
the fact or process of being set free from legal, social, or political restrictions
Example
The emancipation of slaves was a significant moment in American history.
C1 adjective /ɪkˈstɛnjueɪtɪŋ/

extenuating

Meaning
serving to make a fault or an offense seem less serious
Example
She asked for leniency due to extenuating circumstances.
C1 verb /ɪnˈlɪst/

enlist

Meaning
to join or sign up, especially for military service; to secure someone's support or help
Example
He decided to enlist in the army after graduation.
C1 adjective /ˈɛm.ɪ.nənt/

eminent

Meaning
Famous and respected within a particular sphere or profession.
Example
He is an eminent scientist known for groundbreaking research.
C1 noun /ɪkˌsperɪˈmɛnteɪʃən/

experimentation

Meaning
The process of performing a scientific procedure to make a discovery, test a hypothesis, or demonstrate a known fact.
Example
Experimentation leads to groundbreaking products.
C1 adjective /ˌiːɡəˈtɪstɪkəl/

egotistical

Meaning
Excessively self-absorbed or conceited.
Example
Her egotistical behavior made it difficult for her to maintain friendships.
C1 noun /eb/

Ebb

Meaning
the receding tide; a gradual decline or reduction
Example
The fishermen waited for the ebb before returning to shore.
C1 adjective ɪˈveɪ.sɪv

evasive

Meaning
Tending to avoid commitment or self-revelation, especially by responding only indirectly.
Example
He gave an evasive answer to avoid trouble.
C1 noun ˈɛf.lu.ənt

effluent

Meaning
Liquid waste or sewage discharged into a river or the sea.
Example
Factory effluent contaminates nearby rivers and lakes.
C1 adjective ˈɛl.ə.kwənt

eloquent

Meaning
Fluent or persuasive in speaking or writing; clearly expressing or indicating something.
Example
Her eloquent speech inspired the entire audience.
C1 noun /ˈɒntʊrɑːʒ/

entourage

Meaning
A group of people attending or surrounding an important person.
Example
The celebrity arrived with her entourage of assistants and bodyguards.
C1 verb /ɪnˈtæŋɡəl/

entangle

Meaning
to become twisted together or caught in something; to involve in difficulties
Example
The fish got entangled in the net.
C1 noun /ˈɜːrθənˌwɛr/

earthenware

Meaning
pottery made of clay and hardened by heat
Example
The shop displayed beautiful earthenware pots and bowls.
C1 noun /ˈɛpɪθɛt/

epithet

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.
C1 noun ˌes.kəˈleɪ.ʃən

escalation

Meaning
A rapid increase; a rise.
Example
The escalation of production costs impacts profitability.
C1 noun /ɪˈlɪpsɪs/

ellipsis

Meaning
The omission of words in a sentence, represented by three dots (...).
Example
The writer used an ellipsis to show that part of the quote was omitted.
C1 verb /ɪnˈsɜːrkəl/

encircle

Meaning
to form a circle around something
Example
The protesters encircled the building in a human chain.
C1 adjective /ɪnˈθrɔː.lɪŋ/

enthralling

Meaning
Captivating and holding one's attention completely; fascinating.
Example
The movie was enthralling, keeping the audience engaged till the end.
C1 adjective ɪˌɡæl.ɪˈteə.ri.ən

egalitarian

Meaning
Believing in or based on the principle that all people are equal and deserve equal rights and opportunities.
Example
The new law promotes an egalitarian society.
C1 noun /ɪˈvændʒəlɪst/

evangelist

Meaning
A person who seeks to convert others to the Christian faith, especially by public preaching.
Example
The evangelist traveled across the country spreading his message.
C1 noun /ˌɛksɛnˈtrɪsəti/

eccentricity

Meaning
the quality of being unconventional or slightly strange
Example
His eccentricity made him both admired and misunderstood.
C1 verb /ɪnˈdɪr/

endear

Meaning
To cause someone to be loved or liked.
Example
Her kindness and generosity endeared her to the community.
C1 noun /ˈjuːlədʒi/

eulogy

Meaning
A speech or piece of writing that praises someone, especially after their death.
Example
Her brother delivered a heartfelt eulogy at the funeral.
C1 verb /ɪkˈstoʊl/

extol

Meaning
to praise enthusiastically and highly
Example
The teacher extolled the student's dedication and hard work.
C1 verb /ɪkˈstɔːrt/

extort

Meaning
to obtain something, especially money, by force, threats, or unfair means
Example
The gang attempted to extort money from local shopkeepers.
C1 verb /ɪˈdʒɛkt/

eject

Meaning
to force someone or something out, usually from a place or position
Example
The referee had to eject the player for unsportsmanlike behavior.
C1 noun ɪˌməʊ.ʃəˈnæl.ɪ.ti

emotionality

Meaning
The quality of being driven by emotions rather than reason; emotional responsiveness.
Example
His emotionality often influenced his decisions.
C1 noun/adjective /ɪˈliːtɪst/

elitist

Meaning
A person who believes that a society should be led by an elite; showing preference for a privileged class.
Example
His elitist attitude made him unpopular among his peers.
C1 noun /ɪɡˈzɛkjətər/

executor

Meaning
A person appointed to carry out the terms of someone's will after their death.
Example
The executor managed the estate according to the deceased’s wishes.
C1 verb /ɪɡˈzɔːlt/

exalt

Meaning
to praise highly or raise in rank, honor, or power
Example
The community exalted the teacher for his dedication.
C1 adjective /ɪɡˈzɪləreɪtɪŋ/

exhilarating

Meaning
Making someone feel very excited, happy, or thrilled.
Example
Skydiving was the most exhilarating experience of his life.
C1 verb /ˈiːvzdrɒp/

eavesdrop

Meaning
to secretly listen to a conversation
Example
She stood near the door to eavesdrop on their conversation.
C1 adjective /ɪɡˈzuːbərənt/

exuberant

Meaning
full of energy, excitement, and cheerfulness
Example
The children were exuberant after winning the game.
C1 adjective /ˌɛpɪˈsɒdɪk/

episodic

Meaning
Happening occasionally or in separate parts; related to episodes.
Example
Her interest in art was episodic, coming and going over the years.