etiology
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C2 noun /ˌiː.tiˈɒ.lə.dʒi/

etiology

Meaning
the cause or origin of a disease or condition
Example
Doctors are studying the etiology of the new virus.
C2 noun /ˌɛfəˈvɛsəns/

effervescence

Meaning
The release of gas bubbles; vivacity or high-spiritedness.
Example
Her effervescence made her the life of the party.
C2 adjective /ˌɛkspəˈdɪʃəs/

expeditious

Meaning
Done with speed and efficiency.
Example
The expeditious delivery of the package was appreciated.
C2 noun /eɪˈklɑː/

eclat

Meaning
Brilliant success, acclaim, or great public approval.
Example
The artist's debut performance was met with great éclat.
C2 adjective /ˈɛksɪdʒənt/

exigent

Meaning
demanding immediate action or attention; urgent
Example
The patient’s exigent condition required immediate surgery.
C2 verb /ˈɛkspieɪt/

expiate

Meaning
to make amends for guilt or wrongdoing
Example
He tried to expiate his crime by helping the poor.
C2 noun /ɪˌkliːziˈæstɪk/

ecclesiastic

Meaning
A member of the clergy or church official.
Example
The council was attended by several high-ranking ecclesiastics.
C2 noun /ɛmˈpɔːriəm/

emporium

Meaning
A large retail store selling a wide variety of goods.
Example
They visited the new emporium to buy furniture and home decor.
C2 noun /ˈɛpəlɛt/

epaulet

Meaning
An ornamental shoulder piece on a garment, especially on the coat or jacket of a military uniform.
Example
The general’s uniform had a golden epaulet on each shoulder.
C2 noun /ˈjuːfəni/

euphony

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.
C2 adjective /ˈɛnərˌveɪtɪd/

enervated

Meaning
Lacking energy, vitality, or strength; weakened or exhausted.
Example
After the long meeting, she felt completely enervated.
C2 noun /ɪˌkwɪvəˈkeɪʃən/

equivocation

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.
C2 adjective /ˌɛlɪˈfæntaɪn/

elephantine

Meaning
Huge, clumsy, or resembling an elephant in size or movement.
Example
The man moved with an elephantine grace.
C2 noun /ɛθˈnɒlədʒi/

ethnology

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.
C2 noun /ˌiː.mɛnˈdeɪ.ʃən/

emendation

Meaning
a correction or improvement made to a text
Example
The article required several emendations before it was ready for print.
C2 noun /ˈɪəri/

eyrie

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.
C2 noun /ˈɛksɪdʒənsi/

exigency

Meaning
an urgent need or demand requiring immediate attention
Example
In times of war, the exigency of the situation requires quick decisions.
C2 noun /ɪnˈtriːti/

entreaty

Meaning
An earnest or humble request or plea.
Example
She made an entreaty for peace during the heated argument.
C2 verb /ɪmˈbɪtər/

embitter

Meaning
To make someone resentful or angry; to cause bitterness.
Example
The unfair treatment embittered the employees.
C2 adjective /ɛmˈpaɪriəl/

empyreal

Meaning
Heavenly, divine, or relating to the highest heavens.
Example
The poet described the empyreal beauty of the stars.
C2 adjective /ɪˈfɛktʃuəl/

effectual

Meaning
producing a desired or intended effect, often used in formal contexts
Example
Her effectual efforts brought peace to the community.
C2 verb /ɪnˈvaɪərən/

environ

Meaning
to surround or enclose; to encircle
Example
Mountains environ the small valley.
C2 noun /ɪɡˈzɔːrbɪtəns/

exorbitance

Meaning
The quality of being excessive, unreasonable, or going beyond proper limits.
Example
The exorbitance of the hotel's prices shocked the tourists.
C2 verb /ɪˈspaɪ/

espy

Meaning
To catch sight of or notice something, especially from a distance.
Example
From the hilltop, she espied a small village in the valley.
C2 noun /ɪˌnʌn.siˈeɪ.ʃən/

enunciation

Meaning
The act of saying or pronouncing words clearly and distinctly.
Example
His enunciation was clear during the presentation.
C2 noun /ˌɛksɪˈkreɪʃən/

execration

Meaning
An act of cursing or denouncing someone or something with hatred.
Example
The dictator’s name was spoken with execration after his fall.
C2 adjective /ɪkˈspɒzɪtəri/

expository

Meaning
intended to explain or describe something
Example
The teacher gave an expository lecture on the topic.
C2 adjective /ɪˈfɛmɪnət/

effeminate

Meaning
Having traits, tastes, or habits traditionally considered feminine, often used negatively for men.
Example
The critics described him as effeminate due to his gentle manner.
C2 verb /ˈɛmɪt/

emmet

Meaning
an ant; a small insect
Example
The emmet carried food to its nest.
C2 verb /ˈeksɪkreɪt/

execrate

Meaning
To feel or express great loathing or hatred for something.
Example
The community execrated the corrupt politician.
C2 noun /ˈɛmɪsɛri/

emissary

Meaning
A person sent on a special mission, usually as a diplomatic representative.
Example
The king sent an emissary to negotiate peace.
C2 adjective /ɪˈlɪʒən/

elysian

Meaning
Relating to or characteristic of paradise; delightful and heavenly.
Example
They spent an elysian week on the quiet island.
C2 noun /ˌɛksaɪˈteɪʃən/

excitation

Meaning
a state of great excitement or the process of stimulating activity
Example
The news created great excitation among the fans.
C2 adjective /ˌen.zɪˈmæt.ɪk/

enzymatic

Meaning
Relating to or involving enzymes, which are proteins that catalyze biochemical reactions in living organisms.
Example
Enzymatic reactions regulate metabolism in the human body.
C2 noun /ɪˈbʊliəns/

ebullience

Meaning
the quality of being cheerful, enthusiastic, and full of energy
Example
The teacher's ebullience inspired her students.
C2 adjective /ˌeθ.noʊˈsen.trɪk/

ethnocentric

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.
C2 adjective /ɛkˈstrɪnzɪk/

extrinsic

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.
C2 verb /ɪˈfjuːz/

effuse

Meaning
To pour out or express feelings freely and openly.
Example
She effused gratitude for the help she received.
C2 verb /ˈɛnərˌveɪt/

enervate

Meaning
To weaken or drain someone of strength or vitality.
Example
The long hours of work enervated him.
C2 verb /ɪˈvɜːrt/

evert

Meaning
To turn inside out or outward.
Example
The surgeon had to evert the eyelid during the procedure.
C2 adjective /ˈeksɪkrəbl/

execrable

Meaning
Extremely bad or unpleasant.
Example
The movie was so execrable that many people left the theater early.
C2 verb /ɛmˈbleɪzən/

emblazon

Meaning
To decorate or display something in a noticeable or impressive way.
Example
The team's logo was emblazoned on their uniforms.
C2 adjective /ˌɛvəˈnɛsənt/

evanescent

Meaning
Quickly fading or disappearing; lasting for only a very short time.
Example
The beauty of the sunset was evanescent, fading within minutes.
C2 verb /ɛnˈdʒɔɪn/

enjoin

Meaning
to instruct or urge someone to do something; to prohibit legally
Example
The judge enjoined the company from continuing its activities.
C2 noun/adjective /ɪˈmɒliənt/

emollient

Meaning
a substance that softens or soothes the skin
Example
She used an emollient cream to treat her dry skin.
C2 noun /ɪˈmɛtɪk/

emetic

Meaning
a substance that causes vomiting
Example
The doctor administered an emetic to remove the poison.
C2 verb /ˌɛvəˈnɛs/

evanesce

Meaning
To disappear gradually; to fade away.
Example
The mist began to evanesce as the sun rose higher.
C2 noun /ˈɛkwɪpɪdʒ/

equipage

Meaning
Equipment or a carriage with its accessories.
Example
The nobleman arrived in a grand equipage.
C2 verb /ɪnˈræptʃər/

enrapture

Meaning
To fill someone with great delight or joy.
Example
The beautiful music enraptured the audience.
C2 noun /ˌɛksəˈdʒiːsɪs/

exegesis

Meaning
A critical explanation or interpretation of a text, especially a religious scripture.
Example
The professor gave a detailed exegesis of the biblical passage.
C2 verb /ɛksˈproʊprieɪt/

expropriate

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.
C2 noun /ˈɪəri/

eyry

Meaning
an alternative spelling of eyrie; a nest of a bird of prey
Example
The falcon guarded its eyry fiercely.
C2 verb /ɪnˈθroʊn/

enthrone

Meaning
to install someone on a throne or to give someone high status
Example
The king was enthroned in a grand ceremony.
C2 noun /ˌɛpɪˈdɜːrmɪs/

epidermis

Meaning
the outer layer of cells covering the body of an organism, especially the skin
Example
The epidermis protects the body from harmful bacteria.
C2 adjective /ˈɛksplɪkəbəl/

explicable

Meaning
able to be explained or understood
Example
His sudden anger was explicable given the stressful situation.
C2 adjective /ˌɛpɪkjʊˈriːən/

epicurean

Meaning
relating to the enjoyment of fine food, drink, and luxury
Example
The chef prepared an epicurean feast for the guests.
C2 verb /ɪˈstreɪndʒ/

estrange

Meaning
to cause someone to no longer be close or affectionate; to alienate
Example
His constant criticism began to estrange him from his friends.
C2 verb /ˈek.stər.peɪt/

extirpate

Meaning
to completely remove or destroy something unwanted
Example
The government launched a program to extirpate corruption from public offices.
C2 noun /ɪˈfɛmɪnəsi/

effeminacy

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.
C2 verb /ˈɛkskʌlpeɪt/

exculpate

Meaning
to show or declare that someone is not guilty of wrongdoing
Example
The lawyer worked hard to exculpate his client.
C2 noun /ˈɛpɪkjʊr/

epicure

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.
C2 noun /ɪˌpɪstəˈmɒlədʒɪst/

epistemologist

Meaning
A scholar or expert who studies the nature, sources, and limits of knowledge.
Example
The epistemologist debated how humans can truly know anything with certainty.
C2 noun /juːˌtrɑː.fɪˈkeɪ.ʃən/

eutrophication

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.
C2 verb /ɪˈnæmər/

enamor

Meaning
to be filled with love or admiration for
Example
She was enamored with the beautiful scenery.
C2 noun /ˌɛntəˈmɒlədʒi/

entomology

Meaning
The scientific study of insects.
Example
She studied entomology to understand the behavior of bees.
C2 adjective /ɪˈmɛrɪtəs/

emeritus

Meaning
having retired but allowed to retain their title as an honor
Example
He is a professor emeritus at the university.
C2 verb /ɪkˈspʌndʒ/

expunge

Meaning
To erase or remove completely, often something unwanted.
Example
He managed to expunge the embarrassing memory from his mind.
C2 noun /ɪˌlɛkˈtrɑː.lə.sɪs/

electrolysis

Meaning
A chemical decomposition produced by passing an electric current through a liquid or solution.
Example
Electrolysis is used to separate hydrogen from water.
C2 verb /ɛnˈfrænˌtʃaɪz/

enfranchise

Meaning
To grant the right to vote or other rights of citizenship.
Example
The new law enfranchised thousands of people.
C2 noun /ˈiːɡres/

egress

Meaning
The action of going out or leaving a place; an exit.
Example
The emergency door provided an egress for the trapped workers.
C2 noun /ˌɛmjʊˈleɪ.ʃən/

emulation

Meaning
Reproducing something or following someone to achieve success.
Example
The software allows the emulation of old video games on modern devices.
C2 noun /ɪˈfluːviəm/

effluvium

Meaning
an unpleasant or harmful odor, secretion, or discharge
Example
The effluvium from the factory spread across the neighborhood.
C2 adjective /ɪˈfʌldʒənt/

effulgent

Meaning
Shining brilliantly; radiant.
Example
Her effulgent smile brightened everyone's mood.
C2 noun /ˈɪrˌʃɑːt/

earshot

Meaning
the range or distance within which a sound can be heard
Example
The children whispered secrets out of earshot of their parents.
C2 verb /ɪˈmɛnd/

emend

Meaning
to correct or revise a text, especially for errors
Example
The editor emended the manuscript before publication.
C2 adjective /ɛɡˈzɪɡjuəs/

exiguous

Meaning
small in amount; scanty or inadequate
Example
They survived on exiguous rations during the journey.
C2 adjective /ˌiːvənˈhændɪd/

evenhanded

Meaning
Fair and impartial; showing no bias or favoritism.
Example
The judge was praised for her evenhanded approach to the case.
C2 noun /ˈeb.taɪd/

Ebb-tide

Meaning
the movement of the tide out to sea; a time when the sea level is falling
Example
During ebb-tide, we could walk further out on the beach.
C2 noun /ɛmˈpɪrɪˌsɪzəm/

empiricism

Meaning
the theory that all knowledge is derived from sense-experience
Example
Empiricism argues that knowledge comes from experience and observation.
C2 verb /ɪnˈsaɪfər/

encipher

Meaning
to convert a message into code or cipher
Example
The agent enciphered the secret message before sending it.
C2 noun /ˈɒnwiː/ or /ˈɑːnwiː/

ennui

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.
C2 adjective /ˌɛfəˈvɛsənt/

effervescent

Meaning
Giving off bubbles; lively, enthusiastic, and full of energy.
Example
She had an effervescent personality that brightened every room.
C2 noun /ˈjuːər/

ewer

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.
C2 noun /ˈɛskwaɪər/

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.
C2 noun /ɪnˈkʌmbrəns/

encumbrance

Meaning
a burden or obstacle that makes progress or movement difficult
Example
Debt can become a serious encumbrance in life.
C2 noun /ˈɛksplɪkeɪtər/

explicator

Meaning
a person who explains or interprets something in detail
Example
The critic served as an explicator of the poet’s complex works.
C2 adjective /ɪkˈstɛnsəbl/

extensible

Meaning
able to be extended; capable of expansion.
Example
The software is designed to be extensible with new features.
C2 noun /ɪˈskʌtʃən/

escutcheon

Meaning
a shield or emblem bearing a coat of arms
Example
The family crest was displayed on the escutcheon above the fireplace.
C2 verb /ˈeksɔːrsaɪz/

exorcise

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.
C2 adverb /ˌɛkspəˈdɪʃəsli/

expeditiously

Meaning
in a quick and efficient manner
Example
The application was processed expeditiously.
C2 verb /ɪsˈtʃuː/

eschew

Meaning
to deliberately avoid or abstain from something
Example
She chose to eschew junk food for a healthier diet.
C2 verb /ɪkˈspɒstjʊleɪt/

expostulate

Meaning
to express strong disapproval or disagreement
Example
She expostulated with her friend about the risky decision.
C2 noun ˈɛn.ɡræm

Engram

Meaning
Physical signs or patterns in the brain for memory storage and retrieval
Example
Scientists study engrams to understand how memories are stored.
C2 noun /ɪˈlɪksər/

elixir

Meaning
A magical or medicinal potion believed to cure illnesses or grant immortality.
Example
The old legend spoke of an elixir that could grant eternal youth.
C2 verb /ɪnˈkæmp/

encamp

Meaning
to set up or establish a camp
Example
The soldiers encamped near the river for the night.
C2 adjective /ˈɛkstənt/

extant

Meaning
Still in existence; surviving.
Example
Only a few manuscripts from the ancient library are extant.
C2 noun ˌiːkwəˈnɪməti

equanimity

Meaning
Mental calmness, composure, and evenness of temper, especially in a difficult situation.
Example
She handled the news with remarkable equanimity.
C2 noun /ˈɛpɪˌsaɪkl/

epicycle

Meaning
a small circle whose center moves around the circumference of a larger one, used in ancient astronomy
Example
The concept of the epicycle was used to explain planetary motion.
C2 verb /ɪnˈkʌmbər/

encumber

Meaning
to burden or weigh down something, making it difficult to move or progress
Example
She was encumbered by the heavy luggage during her journey.
C2 verb /ˈekspərˌɡeɪt/

expurgate

Meaning
To remove offensive or objectionable parts from a text or speech.
Example
The publisher decided to expurgate the novel before reprinting it.
C2 verb /ɪkˈstruːd/

extrude

Meaning
to force something out through a small opening; to shape by pushing material through a mold
Example
The factory extrudes plastic pipes using modern machines.
C2 verb /ɪnˈtwaɪn/

entwine

Meaning
to twist or wind together; to become closely connected or involved
Example
The vines entwine around the old fence.
C2 verb /ɪˈfeɪs/

efface

Meaning
To erase or wipe out something; to make oneself inconspicuous.
Example
Time had effaced the letters on the old gravestone.
C2 adjective /ˌɛf.ɪˈkeɪ.ʃəs/

efficacious

Meaning
Successful in producing a desired or intended result; effective.
Example
The vaccine proved highly efficacious in preventing infections.
C2 noun /ˈiːən/

eon

Meaning
an indefinitely long period of time; an age
Example
Dinosaurs lived millions of years ago, in a different eon.
C2 adjective /ˌɛl.ɪˈdʒaɪ.ək/

elegiac

Meaning
Expressing sorrow, often for something past; resembling an elegy.
Example
The novel ends on an elegiac note, mourning the lost era.
C2 adjective /ˈek.wə.bəl/

Equable

Meaning
calm and even-tempered; not easily disturbed
Example
He maintained an equable temperament throughout the crisis.
C2 noun /ˈɛdi/

eddy

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.
C2 noun /ɪkˈskrɛsəns/

excrescence

Meaning
An abnormal outgrowth or lump, often considered unattractive.
Example
The building was considered an excrescence on the landscape.
C2 adjective ˈen.də.krɪn

endocrine

Meaning
Relating to or denoting glands that secrete hormones directly into the blood.
Example
The endocrine system regulates metabolism and growth.
C2 verb /ɪˈdjuːs/

educe

Meaning
To draw out or bring forth something latent or hidden.
Example
The teacher tried to educe a response from the shy student.
C2 noun /ˌɛpɪˈsaɪklɔɪd/

epicycloid

Meaning
a curve traced by a point on the circumference of a circle that rolls around the outside of another circle
Example
The mathematician demonstrated how to draw an epicycloid.
C2 noun /ɪˌpɪstəˈmɒlədʒi/

epistemology

Meaning
The branch of philosophy that studies the nature, origin, and scope of knowledge.
Example
Epistemology explores the difference between justified belief and opinion.
C2 noun /ˈɛpɪtɑːf/

epitaph

Meaning
A short text written on a tombstone in memory of the deceased.
Example
The gravestone bore an epitaph honoring the soldier’s bravery.
C2 noun /ɪkˈspiːdiənsi/

expediency

Meaning
the quality of being convenient and practical despite possibly being improper or immoral
Example
He acted out of political expediency rather than principle.
C2 adjective /ɪˈfjuːsɪv/

effusive

Meaning
Expressing feelings of gratitude, pleasure, or approval in an unrestrained or heartfelt manner.
Example
She gave him an effusive welcome after his long journey.
C2 adjective /ˌɛnkəˈmiːæstɪk/

encomiastic

Meaning
Expressing praise; laudatory.
Example
The book was filled with encomiastic remarks about the author.
C2 verb /ɪkˈskruːʃieɪt/

excruciate

Meaning
to cause intense pain or suffering
Example
The injury excruciated him with unbearable pain.
C2 verb /ɪkˈspɛktəreɪt/

expectorate

Meaning
to cough up and spit out mucus from the throat or lungs
Example
The patient began to expectorate thick mucus.
C2 adjective /ɪkˈskɜːsɪv/

excursive

Meaning
Tending to digress or wander; moving away from the main subject.
Example
His excursive lecture left the students confused about the main topic.
C2 noun /ɪˈmɒljʊmənt/

emolument

Meaning
payment for work or services; salary or fees
Example
The professor received his annual emolument from the university.