experiment
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A2 noun/verb /ɪkˈsperɪmənt/

experiment

Meaning
a test or trial carried out to discover something or prove an idea
Example
The scientist conducted an experiment on plant growth.
C1 noun /ˈɑːnkɔːr/

encore

Meaning
An additional performance demanded by an audience at the end of a show.
Example
The band returned to the stage for an encore.
B2 adjective /ɪkˈsten.sɪv/

Extensive

Meaning
covering or affecting a large area; comprehensive; wide-ranging
Example
The company conducted extensive research before launching the new product.
B1 noun /ˈɝːθ.kweɪk/

earthquake

Meaning
A sudden and violent shaking of the ground as a result of movements within the earth's crust.
Example
A powerful earthquake struck Japan last night.
B2 noun /ˌɒn.trə.prəˈnɜːr/

Entrepreneur

Meaning
a person who organizes and operates a business or businesses
Example
The young entrepreneur started her own tech company at age 22.
B1 adjective /ɪkˈspɛktɪd/

expected

Meaning
Regarded as likely to happen; anticipated or predicted.
Example
The unemployment rate is expected to decline further.
B2 verb, adjective /ɪˈlæbəreɪt/ (verb), /ɪˈlæbərət/ (adjective)

elaborate

Meaning
verb: to explain something in detail; adjective: detailed and complicated in design
Example
She asked him to elaborate on his proposal.
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.
A2 verb /ɪkˈspekt/

expect

Meaning
to think something will happen; to anticipate
Example
I expect the meeting to start at 9 AM.
C1 noun /ˈef.ɪ.dʒi/

Effigy

Meaning
a sculpture or model of a person, especially one made as a protest
Example
The protesters burned an effigy of the corrupt politician in the square.
B2 verb /ɪˈrʌpt/

erupt

Meaning
to burst forth suddenly and violently
Example
The volcano erupted after centuries of dormancy.
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.
B1 noun /ˈɛnvəloʊp/

envelope

Meaning
a flat paper container used to enclose a letter or document
Example
She sealed the letter in an envelope and posted it.
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.
B2 noun ˈɛmpəθi

empathy

Meaning
The ability to understand and share the feelings of another person.
Example
Empathy helps students connect with society.
C1 verb /ɪnˈsɜːrkəl/

encircle

Meaning
to form a circle around something
Example
The protesters encircled the building in a human chain.
B2 adjective ɪkˈstɪŋkt

extinct

Meaning
No longer in existence; having died out completely.
Example
Some species are becoming extinct due to overfishing.
B1 verb /ˈɛstɪˌmeɪt/

estimate

Meaning
To roughly calculate or judge the value, number, quantity, or extent of something.
Example
The engineer estimated the cost of the project at $5 million.
A1 adjective /ˈiː.vən/

Even

Meaning
flat and smooth; equal or uniform; level
Example
The surface was completely even and smooth.
C1 adverb ɪkˌsperɪˈmentəli

experimentally

Meaning
In a way that is based on or derived from experiment and observation rather than theory.
Example
Bose demonstrated findings experimentally.
C2 verb /ˈɛmɪt/

emmet

Meaning
an ant; a small insect
Example
The emmet carried food to its nest.
A1 verb /iːt/

eat

Meaning
to put food in the mouth and chew and swallow it
Example
We eat dinner at 7 PM.
B2 verb /ɪmˈbɑːrk/

embark

Meaning
to begin a journey, project, or activity
Example
She decided to embark on a new career in medicine.
B2 verb /ɪnˈkʌmpəs/

encompass

Meaning
To include comprehensively; to surround or encircle.
Example
The project will encompass all aspects of rural development.
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 /ɪˈrɒtɪk/

erotic

Meaning
relating to or tending to arouse sexual desire or excitement
Example
The novel contained several erotic scenes.
C2 noun /ˈɛpənɪm/

eponym

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.
A2 verb /ɪkˈspleɪn/

explain

Meaning
to make something clear or easy to understand by describing it in more detail
Example
The teacher explained the difficult concept to the students.
B2 adjective /ɪkˈstɜːr.nəl/

External

Meaning
coming from or relating to the outside; not belonging to or originating from within
Example
The company hired external consultants to review their business strategy.
C1 adjective /ɪnˈɡreɪnd/

engrained

Meaning
Firmly fixed or established; difficult to change.
Example
Cultural practices are often deeply engrained in the fabric of society.
C2 adjective /ɛmˈpaɪriəl/

empyreal

Meaning
Heavenly, divine, or relating to the highest heavens.
Example
The poet described the empyreal beauty of the stars.
B2 verb /ɪmˈbɒdi/

embody

Meaning
To give tangible or visible form to an idea, quality, or feeling.
Example
She embodies the spirit of generosity.
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.
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.
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.
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.
A1 pronoun /ˈɛvrɪwʌn/

everyone

Meaning
every person; all people
Example
Everyone must bring their own lunch.
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.
A2 noun ɪnˈvaɪ.rən.mənt

environment

Meaning
The surroundings or conditions in which a person, animal, or plant lives or operates.
Example
Protecting the environment is crucial for future generations.
C1 noun /ˈɛkstrəˌvɜːrt/

extrovert

Meaning
a person who is outgoing, sociable, and energized by being around other people
Example
As an extrovert, she enjoys meeting new people at social events.
C1 verb /ɪnˈkæp.sjʊ.leɪt/

encapsulate

Meaning
To express the essential features of something succinctly; to summarize or contain within.
Example
The introduction should encapsulate the main points of the article.
C1 noun /ˈɛksɜːrpt/

excerpt

Meaning
A short portion taken from a text, film, or piece of music.
Example
The teacher read an excerpt from the novel.
A2 noun /ɛmˈplɔɪ.iː/

employee

Meaning
A person who works for an organization or company in return for payment.
Example
The company values each employee's contribution to its success.
C2 adjective /ɪɡˈzɔːstɪbəl/

exhaustible

Meaning
able to be used up completely; not infinite
Example
Coal and oil are exhaustible resources.
B2 verb /ɪˈvækjueɪt/

evacuate

Meaning
To remove people from a dangerous place to safety.
Example
The residents were ordered to evacuate the building after the fire alarm.
C2 verb /ɪnˈtriːt/

entreat

Meaning
To ask earnestly or beg someone to do something.
Example
She entreated him to stay a little longer.
B1 adjective /ɪɡˈzækt/

Exact

Meaning
precise; accurate; completely correct
Example
Please give me the exact time of the meeting.
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.
A1 adverb /ˈevər/

Ever

Meaning
at any time; always; in any way
Example
Have you ever been to Paris?
C1 verb /ɪkˈstræpəleɪtɪŋ/

extrapolating

Meaning
Extend the application of (a method or conclusion) to an unknown situation by assuming that existing trends will continue.
Example
Extrapolating from the current data, we can estimate the trends for next year.
B1 adjective /ɪˈsɛnʃəl/

essential

Meaning
Absolutely necessary; extremely important.
Example
Water is essential for life.
B2 noun /ˌɛkskləˈmeɪʃən/

exclamation

Meaning
A sudden cry or remark expressing strong emotion or surprise.
Example
She let out an exclamation of joy when she heard the news.
C1 noun /ˈɛksədəs/

exodus

Meaning
A mass departure of people from a place.
Example
There was a sudden exodus of workers after the strike began.
C1 adjective /ˈɛntərˌpraɪzɪŋ/

enterprising

Meaning
showing initiative and resourcefulness; willing to take risks to achieve success
Example
She is an enterprising young entrepreneur.
B2 noun /ˈaɪ.bɔːl/

Eyeball

Meaning
the round part of the eye within the eyelids and socket
Example
The doctor examined his eyeball carefully.
C2 adjective /ˌɛnkəˈmiːæstɪk/

encomiastic

Meaning
Expressing praise; laudatory.
Example
The book was filled with encomiastic remarks about the author.
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.
B2 noun ɪˌvæljuˈeɪʃən

evaluation

Meaning
The making of a judgment about the amount, number, or value of something; assessment.
Example
Accurate evaluation helps determine resource sustainability.
C2 adjective /ɪkˈspɒzɪtəri/

expository

Meaning
intended to explain or describe something
Example
The teacher gave an expository lecture on the topic.
C1 adjective /ˈevər ˈlæstɪŋ/

Ever-lasting

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

elated

Meaning
Extremely happy and excited.
Example
She was elated when she heard the good news.
B2 noun /ˌek.spɪˈdɪʃ.ən/

Expedition

Meaning
a journey undertaken by a group of people with a particular purpose; organized trip for exploration
Example
The mountain climbing expedition required months of careful planning and preparation.
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.
B2 verb ɪmˈpaʊərɪŋ

empowering

Meaning
Giving someone the authority or power to do something; making someone stronger and more confident.
Example
Empowering children can lead to societal progress.
C1 adverb /ˈiːstwədz/

Eastwards

Meaning
towards the east; in an eastern direction
Example
The river flows eastwards into the ocean.
A2 verb /ɪkˈsaɪt/

excite

Meaning
to cause strong feelings of enthusiasm or eagerness
Example
The idea of traveling abroad excites her.
A2 abbreviation /iː ˈdʒiː/

e.g.

Meaning
For example (from Latin 'exempli gratia').
Example
You should eat more fruits, e.g., apples and bananas.
C1 noun /ˈɜːrθənˌwɛr/

earthenware

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

endowment

Meaning
An income or form of property given or bequeathed to someone.
Example
The university received a large endowment for research.
B1 adjective /ˈiːvəl/

evil

Meaning
Profoundly immoral and wicked.
Example
They believed the villain was the embodiment of evil.
C2 verb /ɪkˈstɛmpəraɪz/

extemporize

Meaning
To speak or perform without preparation; improvise.
Example
The actor had to extemporize when he forgot his lines.
C2 verb /ɪnˈræptʃər/

enrapture

Meaning
To fill someone with great delight or joy.
Example
The beautiful music enraptured the audience.
B1 adjective ˌiːkəˈnɒmɪk

economic

Meaning
Relating to economics or the economy.
Example
The issue had significant economic implications.
C1 noun /ɪkˈstrækʃən/

extraction

Meaning
the act of removing something, especially by pulling it out
Example
The extraction of oil from the ground requires special equipment.
C1 adjective ˈek.wɪ.tə.bəl

equitable

Meaning
Fair and impartial
Example
Equitable AI ensures fairness in technology use.
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.
B2 verb ɪˈrɛktɪŋ

erecting

Meaning
To build; construct; set up in a vertical position.
Example
The workers were erecting a new building downtown.
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.
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.
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 adjective /ˌɛkstrəˌdʒuːˈdɪʃəl/

extrajudicial

Meaning
done outside the authority of the legal system or judicial process
Example
The activists condemned the extrajudicial killings.
B1 verb /ɪmˈbærəs/

embarrass

Meaning
to cause someone to feel awkward, self-conscious, or ashamed
Example
His rude comment really embarrassed her in front of everyone.
B2 noun /ɪkˈses/

Excess

Meaning
an amount of something that is more than necessary, permitted, or desirable
Example
The excess food from the party was donated to the local shelter.
C1 verb /ɪˈlɛktrɪfaɪ/

electrify

Meaning
to charge with electricity; to excite or thrill intensely
Example
The speaker's speech electrified the audience.
B2 verb /ɪɡˈzædʒəˌreɪt/

exaggerate

Meaning
to describe something as better, worse, or more important than it really is
Example
He tends to exaggerate his achievements.
C1 noun ɪkˌstræp.əˈleɪ.ʃən

extrapolation

Meaning
The action of estimating or concluding something by assuming that existing trends will continue.
Example
His extrapolation of market trends helped in financial planning.
C1 noun /ˈɛksələnsɪ/

excellency

Meaning
a title of honor for people of high rank, especially ambassadors or governors
Example
His Excellency the Ambassador attended the ceremony.
B2 adjective ɪˈvɒlvɪŋ

evolving

Meaning
Developing gradually, especially from a simple to a more complex form; changing and developing.
Example
Education plays a role in evolving societal norms.
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.
B2 verb, noun /ɪkˈsplɔɪt/

exploit

Meaning
to make full use of and derive benefit from (a resource); to use someone unfairly for one’s own advantage
Example
The company was accused of exploiting child labor.
B1 adjective /ɪnˌθjuːziˈæstɪk/

enthusiastic

Meaning
Having or showing intense and eager enjoyment, interest, or approval.
Example
The explorers were enthusiastic about the journey.
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.
B1 noun /ɪnˈdʒɔɪmənt/

enjoyment

Meaning
the state or process of taking pleasure or satisfaction in something
Example
She felt great enjoyment while reading her favorite book.
C2 noun /ˌɛfəˈvɛsəns/

effervescence

Meaning
The release of gas bubbles; vivacity or high-spiritedness.
Example
Her effervescence made her the life of the party.
B2 verb ɪnˈfɔːrsɪŋ

enforcing

Meaning
To compel observance of or compliance with a law, rule, or obligation.
Example
Enforcing strict laws is necessary to prevent violations.
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 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 /ɛnˈdʒɔɪn/

enjoin

Meaning
to instruct or urge someone to do something; to prohibit legally
Example
The judge enjoined the company from continuing its activities.
B1 adjective /ɪkˈstendɪd/

extended

Meaning
longer or larger than usual; continuing for a longer time
Example
They took an extended vacation in Europe this summer.
C2 noun /ɪkˈsɪʒən/

excision

Meaning
the act of cutting something out, especially by surgical removal
Example
The excision of the infected tissue prevented further complications.
B2 noun /ˈɛseɪ/

essay

Meaning
A short piece of writing on a particular subject.
Example
She wrote an essay about climate change.
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.
C1 adjective /ɪˈɡriːdʒəs/

egregious

Meaning
Outstandingly bad; shocking.
Example
The company was fined for its egregious safety violations.
C1 adjective /ɪˈfɛm.ər.əl/

ephemeral

Meaning
Lasting for a very short time; temporary or transitory.
Example
The beauty of cherry blossoms is ephemeral.
C1 noun /ˌɛksɛnˈtrɪsəti/

eccentricity

Meaning
the quality of being unconventional or slightly strange
Example
His eccentricity made him both admired and misunderstood.
A1 verb /ɪnˈdʒɔɪ/

enjoy

Meaning
to take pleasure in; to have a good time
Example
I enjoy reading books in my free time.
C1 verb /ɪnˈɡreɪv/

engrave

Meaning
to cut or carve a design, letter, or pattern into a hard surface
Example
The craftsman engraved her name on the silver ring.
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 /ɛnˈdɔːr.fɪnz/

endorphins

Meaning
Chemical compounds produced by the brain that reduce pain and create feelings of happiness.
Example
Exercise releases endorphins, reducing stress and pain.
B1 noun /ɪˌlɛkˈtrɒnɪks/

electronics

Meaning
the branch of physics and technology dealing with circuits and devices using transistors, microchips, and other components
Example
He studied electronics at university.
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.
B2 adjective /ˌɛm.pəˈθɛ.tɪk/

empathetic

Meaning
Showing ability to understand and share feelings of others.
Example
She was empathetic towards her friend's struggles.
B2 noun /ˈɛθɪk/

ethic

Meaning
a set of moral principles, especially ones relating to a particular group, system, or profession
Example
He has a strong work ethic and always meets deadlines.
C1 adjective /ˈed.jʊ.keɪ.tɪv/

Educative

Meaning
providing education; instructive; informative
Example
The documentary was highly educative and informative.
C1 verb /ɪnˈlaɪvən/

enliven

Meaning
to make something more lively, interesting, or cheerful
Example
Her jokes helped enliven the dull meeting.
B2 verb /ɪnˈɡeɪdʒɪŋ/

engaging

Meaning
Participating or becoming involved in; occupying or attracting someone's interest or attention.
Example
Engaging youth in education is essential.
C1 noun/verb /ɪˈstiːm/

esteem

Meaning
Respect and admiration, typically for a person.
Example
She is held in high esteem by her colleagues.
C2 verb /ɪmˈbɪtər/

embitter

Meaning
To make someone resentful or angry; to cause bitterness.
Example
The unfair treatment embittered the employees.
B2 noun /ˌek.əˈnɒm.ɪk səˌsteɪ.nəˈbɪl.ə.ti/

economic sustainability

Meaning
The ability of an economy to support a defined level of economic production indefinitely.
Example
Economic sustainability drives long-term growth.
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.
B2 adjective /ɪnˈdjʊər.ɪŋ/

Enduring

Meaning
lasting; permanent; continuing for a long time
Example
Their enduring friendship lasted for decades.