electrolysis
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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 adjective /ɪkˈstɛnsəbl/

extensible

Meaning
able to be extended; capable of expansion.
Example
The software is designed to be extensible with new features.
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 noun /ˈel.ɪ.fənt ˈæp.əl/

Elephant Apple

Meaning
a tropical fruit with a hard shell and acidic flesh
Example
Elephant apple is used to make delicious jams and pickles.
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 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 /ˈiːən/

eon

Meaning
an indefinitely long period of time; an age
Example
Dinosaurs lived millions of years ago, in a different eon.
C2 noun /ɪˈfjuːʒən/

effusion

Meaning
An unrestrained outpouring of words, feelings, or emotions.
Example
His letter was an effusion of love and longing.
C2 verb /ɪnˈθrɔːl/

enthral

Meaning
To captivate or hold someone’s full attention.
Example
The magician’s performance enthralled the audience.
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 adjective /juːˈdʒɛnɪk/

eugenic

Meaning
Relating to or aiming at improving the genetic quality of a population.
Example
In the early 20th century, some scientists supported eugenic policies.
C2 verb /ɪnˈskɒns/

ensconce

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.
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 adjective /ɛɡˈzɪɡjuəs/

exiguous

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

expostulation

Meaning
the act of expressing protest or disagreement
Example
His expostulation against the unfair rules was ignored.
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 /ˈɪrˌsplɪtɪŋ/

earsplitting

Meaning
extremely loud or piercing sound
Example
The earsplitting noise of the fire alarm startled everyone.
C2 verb /ɪˈmɛnd/

emend

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

elegy

Meaning
A poem or song expressing sorrow, especially for someone who has died.
Example
The poet wrote an elegy for his late friend.
C2 verb /ˈɛkspieɪt/

expiate

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

effectuate

Meaning
to put into force or cause to happen; to bring about
Example
The manager effectuated the changes to improve efficiency.
C2 adjective /juːˈfoʊniəs/

euphonious

Meaning
Pleasing to the ear; having a sweet sound.
Example
The poet's euphonious language made the verse a delight to read.
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 /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 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 /ɪksˈtʃɛkər/

exchequer

Meaning
The treasury of a state or country.
Example
The government announced new measures to improve the exchequer.
C2 noun /ˌiː.kəʊ.tɒkˈsɪ.kə.lə.dʒi/

ecotoxicology

Meaning
The study of the effects of chemical pollution on the environment.
Example
Ecotoxicology studies the effects of pesticides on wildlife.
C2 verb /ɪmˈbɪtər/

embitter

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

ecliptic

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.
C2 verb ɪɡˈzɔːrt

exhort

Meaning
To strongly encourage or urge someone to do something.
Example
The teacher exhorted students to work hard for exams.
C2 adverb /ˌɛkspəˈdɪʃəsli/

expeditiously

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

equivocate

Meaning
To speak ambiguously or avoid giving a clear answer.
Example
The politician equivocated when asked about the scandal.
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 verb /ɪˈvɪsəˌreɪt/

eviscerate

Meaning
to remove the internal organs of; to deprive of essential content
Example
The critics eviscerated the movie for its weak storyline.
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 verb /ɪkˈspɒstjʊleɪt/

expostulate

Meaning
to express strong disapproval or disagreement
Example
She expostulated with her friend about the risky decision.
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 noun /ˌɛpɪzəʊˈɒtɪk/

epizootic

Meaning
An outbreak of disease affecting many animals of one kind at the same time.
Example
The farmer feared an epizootic might wipe out his cattle.
C2 adjective /ɪɡˈzɔːstɪbəl/

exhaustible

Meaning
able to be used up completely; not infinite
Example
Coal and oil are exhaustible resources.
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 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 /ɪnˈdjuː/

endue

Meaning
To provide or endow with a quality or ability.
Example
The leader was endued with wisdom and courage.
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 adjective /ˌɛkstrəˌdʒuːˈdɪʃəl/

extrajudicial

Meaning
done outside the authority of the legal system or judicial process
Example
The activists condemned the extrajudicial killings.
C2 noun /ˈɛnsaɪn/

ensign

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.
C2 noun /ɛnˈkoʊmiəm/

encomium

Meaning
A speech or piece of writing that praises someone or something highly.
Example
He delivered an encomium to his retiring teacher.
C2 verb /ɪkˈstɛnjueɪt/

extenuate

Meaning
to make an offense, fault, or situation seem less serious by providing an excuse or explanation
Example
The lawyer tried to extenuate his client's actions by highlighting his difficult childhood.
C2 adjective /ˌɛkjʊˈmɛnɪkəl/

ecumenical

Meaning
Promoting unity among different Christian churches or religions.
Example
The leaders gathered for an ecumenical conference to encourage dialogue.
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 verb /ɛnˈfiːbəl/

enfeeble

Meaning
To make weak or feeble; to deprive of strength.
Example
The long illness enfeebled the old man.
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 adjective /ˌjuːləˈdʒɪstɪk/

eulogistic

Meaning
Expressing praise or admiration, often formally.
Example
The speaker gave a eulogistic account of the leader’s achievements.
C2 noun /ɛˌspriː də ˈkɔːr/

esprit de corps

Meaning
A feeling of pride, fellowship, and loyalty shared by members of a group.
Example
The team's esprit de corps was evident in their cooperative effort.
C2 adjective /ˌɛkspəˈdɪʃəs/

expeditious

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

excrescence

Meaning
An abnormal outgrowth or lump, often considered unattractive.
Example
The building was considered an excrescence on the landscape.
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 /ˈɛmɪt/

emmet

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

effacing

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.
C2 noun /ɪɡˈzækʃən/

exaction

Meaning
the act of demanding or obtaining something, especially unfairly
Example
The peasants suffered under the king's heavy exactions.
C2 noun /ɪˈlɛk.trə.taɪp/

electrotype

Meaning
A duplicate printing plate made by electroplating a mold of the original.
Example
The printer used an electrotype to produce multiple copies of the page.
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 /ˈɛpəlɛt/

epaulette

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.
C2 adjective /ɪˈfiːt/

effete

Meaning
Lacking vitality, strength, or effectiveness; weak and overrefined.
Example
The empire became effete after centuries of indulgence.
C2 verb /ˌɛfəˈvɛs/

effervesce

Meaning
To give off bubbles of gas; to show excitement, liveliness, or enthusiasm.
Example
The soda began to effervesce as soon as it was opened.
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 verb /ˌɛvəˈnɛs/

evanesce

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

emaciate

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.
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 adjective /ˈɛnərˌveɪtɪd/

enervated

Meaning
Lacking energy, vitality, or strength; weakened or exhausted.
Example
After the long meeting, she felt completely enervated.
C2 adjective /ˌɛl.ɪˈmɑː.səˌnɛr.i/

eleemosynary

Meaning
Relating to charity; dependent on or supported by charity.
Example
The hospital was founded as an eleemosynary institution.
C2 noun /ɪˌkliːziˈæstɪk/

ecclesiastic

Meaning
A member of the clergy or church official.
Example
The council was attended by several high-ranking ecclesiastics.
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 adjective ˈɛr.jʊ.daɪt

erudite

Meaning
Having or showing great knowledge or learning; scholarly and intellectual.
Example
The professor's erudite lecture fascinated the students.
C2 verb /ɪnˈræptʃər/

enrapture

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

efflorescence

Meaning
the process of flowering or reaching an optimal stage of development
Example
The garden was at the peak of its efflorescence in spring.
C2 noun /ɪˌdʒækjʊˈleɪʃən/

ejaculation

Meaning
The action of suddenly saying something or the release of semen during sexual climax.
Example
His sudden ejaculation of joy surprised everyone in the room.
C2 verb /ɪkˈspeɪʃiˌeɪt/

expatiate

Meaning
to speak or write at length or in detail
Example
The professor expatiated on the importance of critical thinking.
C2 noun ˌɛr.jʊˈdɪʃ.ən

erudition

Meaning
The quality of having or showing great knowledge or learning; scholarship.
Example
His erudition in history impressed the entire audience.
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 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 /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 adjective /ˈɛkstənt/

extant

Meaning
Still in existence; surviving.
Example
Only a few manuscripts from the ancient library are extant.
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 adjective /ɪˈbʊliənt/

ebullient

Meaning
cheerful and full of energy
Example
She was ebullient after receiving the good news.
C2 adjective /ˌɛfləˈrɛsənt/

efflorescent

Meaning
in the process of blooming or flourishing
Example
The efflorescent trees made the park look beautiful.
C2 noun /ɪɡˈzɛmplɑːr/

exemplar

Meaning
A model or pattern to be copied or imitated.
Example
She is an exemplar of kindness and generosity.
C2 verb /ɪnˈkæmp/

encamp

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

equivocal

Meaning
Open to more than one interpretation; ambiguous.
Example
His equivocal answer confused everyone.
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 /ˌɛfəˈvɛsəns/

effervescence

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

enamor

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

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.
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 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 /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 /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 verb /ɛnˈkɪndl/

enkindle

Meaning
to set on fire or inspire strong emotion
Example
The speech enkindled hope in the audience.
C2 adjective /ˌɛnkəˈmiːæstɪk/

encomiastic

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

edifying

Meaning
Providing moral or intellectual instruction or enlightenment.
Example
The documentary was both entertaining and edifying.
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 /eɪˈklɑː/

eclat

Meaning
Brilliant success, acclaim, or great public approval.
Example
The artist's debut performance was met with great éclat.
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 /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 noun /ˈɛndaɪv/ or /ˈɑːndɪv/

endive

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.
C2 noun /ɪkˌsprəʊ.priˈeɪ.ʃən/

expropriation

Meaning
The act of government taking private property, also known as confiscation, nationalization, or seizure.
Example
The land expropriation led to disputes among landowners.
C2 adjective /ˈɛrənt/

errant

Meaning
behaving wrongly or straying from the proper course or standards
Example
The teacher disciplined the errant student.
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 /ˈɛksɪdʒənt/

exigent

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

effuse

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

eclecticism

Meaning
A method or practice of deriving ideas, style, or taste from a broad and diverse range of sources.
Example
The architect’s work shows eclecticism by blending modern and traditional elements.
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 verb /ɛksˈhjuːm/

exhume

Meaning
to dig out something buried, especially a body from the ground
Example
The archaeologists decided to exhume the ancient remains.
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 /ˈɛksplɪkəbəl/

explicable

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

epistolary

Meaning
Related to the writing of letters; expressed in or through letters.
Example
The novel is written in an epistolary style, consisting of letters between characters.