ecotoxicology
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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.
B2 adjective /ɪɡˈzɑːtɪk/

exotic

Meaning
Unusual and attractive because it is from a foreign place or culture.
Example
The garden was filled with exotic plants from tropical countries.
C2 adjective /ɪˈbʊliənt/

ebullient

Meaning
cheerful and full of energy
Example
She was ebullient after receiving the good news.
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.
B2 noun ɪˈfɪʃ.ən.si

efficiency

Meaning
The state or quality of being efficient; achieving maximum productivity with minimum wasted effort or expense.
Example
Efficiency in communication is crucial for businesses.
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.
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.
B2 adjective /ˈed.ɪ.bəl/

Edible

Meaning
safe to eat; suitable for consumption
Example
Only edible mushrooms should be used in cooking.
A2 adjective /ɪˈlɛktrɪk/

electric

Meaning
Relating to or operated by electricity.
Example
The room was lit by an electric lamp.
C1 noun /ˈaɪ.wɪt.nəs/

Eyewitness

Meaning
a person who has seen something happen and can give evidence about it
Example
The police interviewed several eyewitnesses to the accident.
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 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.
A1 noun /ˈiːv.nɪŋ/

evening

Meaning
the part of the day between afternoon and night
Example
We went for a walk in the cool evening.
C1 noun ˌɛkstərˈnælɪtiz

externalities

Meaning
A side effect or consequence of an industrial or commercial activity.
Example
Pollution is a negative externality of industrialization.
A2 noun /ɪmˈplɔɪər/

employer

Meaning
A person or organization that hires and pays people to work.
Example
The employer promised better benefits to attract skilled workers.
B1 adjective /ˈiːvəl/

evil

Meaning
Profoundly immoral and wicked.
Example
They believed the villain was the embodiment of evil.
C1 adjective /ˈen.vi.ə.bəl/

Enviable

Meaning
causing envy; desirable
Example
Her success was enviable among her peers.
B2 adverb /ˈiːɡərli/

Eagerly

Meaning
with keen interest or enthusiasm; with great desire
Example
The children eagerly waited for the holiday to begin.
C2 verb /ɪkˈskruːʃieɪt/

excruciate

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

enervated

Meaning
Lacking energy, vitality, or strength; weakened or exhausted.
Example
After the long meeting, she felt completely enervated.
C1 adjective /ɪɡˈzɪləreɪtɪd/

exhilarated

Meaning
feeling very happy, animated, or elated
Example
She felt exhilarated after finishing the marathon.
A1 noun /ɪɡˈzɑːm.pəl/

example

Meaning
a thing or person regarded as a model to be followed or avoided
Example
He is a good example of a hardworking student.
B2 adjective /ˌiːkəˈnɒmɪkl/

economical

Meaning
Careful in the use of resources; providing good value or efficiency.
Example
Driving a hybrid car is economical in the long run.
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 verb /ɪnˈtaɪtəl/

entitle

Meaning
to give someone the right to have or do something
Example
Employees are entitled to receive paid holidays.
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.
A2 abbreviation /ɛtˈsɛtərə/

etc

Meaning
Used to indicate additional, similar items in a list that are not mentioned.
Example
The shop sells fruits, vegetables, dairy, etc.
B1 adjective /ˌɛdjuˈkeɪʃənl/

educational

Meaning
Relating to the provision of education or having an educative effect.
Example
The journey was an educational experience.
B2 verb /ɪˈveɪd/

evade

Meaning
To escape or avoid something, especially by cleverness or trickery.
Example
He tried to evade the question by changing the subject.
C1 noun /ˌɛks.həˈleɪ.ʃən/

exhalation

Meaning
The action of breathing out.
Example
Slow exhalation calms the nervous system.
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.
C1 adjective /ɪmˈfæt.ɪk/

Emphatic

Meaning
forceful; strong; showing emphasis; expressed with force and conviction
Example
She gave an emphatic 'no' to the proposal.
A2 verb ɜrn

earn

Meaning
To obtain money, typically as payment for work or through investment; to acquire or deserve through one's efforts.
Example
Assets help you earn income even while sleeping.
B2 verb /ɪnˈlɑːrdʒ/

enlarge

Meaning
to make something bigger or increase in size
Example
They decided to enlarge their house.
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.
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.
C2 noun /ɪɡˈzækʃən/

exaction

Meaning
the act of demanding or obtaining something, especially unfairly
Example
The peasants suffered under the king's heavy exactions.
A1 pronoun /ˈɛvrɪθɪŋ/

everything

Meaning
all things; the whole lot
Example
He packed everything in his suitcase.
C1 adjective /ˈɛntərˌpraɪzɪŋ/

enterprising

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

expire

Meaning
to come to an end, especially a period of validity or life
Example
My passport will expire next month.
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.
B2 noun /ˈep.ɪk/

Epic

Meaning
a long poem telling of heroic deeds; something heroic or grand in scale
Example
The Iliad is one of the most famous epics in world literature.
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.
B1 verb /ɪmˈplɔɪ/

employ

Meaning
to hire someone to do a job; to use something effectively
Example
The company plans to employ more engineers next year.
C1 adjective ˈek.wɪ.tə.bəl

equitable

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

endanger

Meaning
To put someone or something at risk or in danger.
Example
Cutting down forests can endanger many species of animals.
C1 adjective /ˌɛɡzɪˈstɛnʃəl/

existential

Meaning
Relating to human existence, often concerning meaning or purpose of life.
Example
She went through an existential crisis during her midlife.
A2 noun /ɪˈkwɪpmənt/

equipment

Meaning
the necessary tools, machines, or other items needed for a particular purpose
Example
The laboratory bought new equipment for research.
B2 noun /ɪmˈbærəsmənt/

embarrassment

Meaning
a feeling of self-consciousness, shame, or awkwardness
Example
Her face turned red with embarrassment after the mistake.
B2 adjective /ɪkˈskluːdɪd/

Excluded

Meaning
not included; left out; barred from participation
Example
He felt excluded from the group activities and conversations.
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.
A2 preposition/conjunction /ɪkˈsɛpt/

except

Meaning
not including; other than
Example
Everyone was invited except John.
C2 verb /ɪˈnəʊbəl/

ennoble

Meaning
to give someone a noble rank or to elevate in dignity or honor
Example
His selfless actions ennobled his character in the eyes of others.
B2 verb, noun /ɪnˈdevər/

endeavour

Meaning
To try hard to achieve something; an attempt or effort
Example
She endeavoured to finish the project on time.
A1 verb /iːt/

eat

Meaning
to put food in the mouth and chew and swallow it
Example
We eat dinner at 7 PM.
A1 noun /aɪ/

Eye

Meaning
the organ of sight; the ability to see
Example
Her eyes sparkled with joy.
B1 adjective /ˌen.əˈdʒet.ɪk/

Energetic

Meaning
having or showing great activity; vigorous; full of energy
Example
She is very energetic and loves outdoor activities.
C1 verb /ɪnˈʃraɪn/

enshrine

Meaning
to preserve or cherish something as sacred or important
Example
The constitution enshrines the right to freedom of speech.
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 /ˌɛvɪˈdɛnʃəl/

evidential

Meaning
relating to or providing evidence
Example
The lawyer presented evidential support for her claims.
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.
C1 verb /ɪnˈɡʌlf/

engulf

Meaning
to completely surround or cover something or someone
Example
The village was engulfed by floodwaters.
C1 adjective + noun এক্সেসিভ স্ট্রেইন

excessive strain

Meaning
An amount of physical pressure or stress that is more than what is normal or acceptable.
Example
Excessive strain on fingers can cause musculoskeletal issues.
B2 adjective ɪkˈstɪŋkt

extinct

Meaning
No longer in existence; having died out completely.
Example
Some species are becoming extinct due to overfishing.
B2 verb /ɪmˈbɑːrk/

embark

Meaning
to begin a journey, project, or activity
Example
She decided to embark on a new career in medicine.
C2 verb /ɪkˈspʌndʒ/

expunge

Meaning
To erase or remove completely, often something unwanted.
Example
He managed to expunge the embarrassing memory from his mind.
B2 noun /ɪnˈrɪtʃ.mənt/

enrichment

Meaning
The action of improving or enhancing the quality or value of something.
Example
Cultural enrichment fosters a deeper understanding of traditions.
B2 noun /ɪɡˈzæmɪnər/

examiner

Meaning
A person who tests or inspects knowledge, skills, or qualifications
Example
The examiner reviewed each student's answer sheet carefully.
C2 verb /ˈjuːləˌdʒaɪz/

eulogize

Meaning
To praise highly in speech or writing, especially in honor of someone who has died.
Example
They gathered to eulogize their beloved teacher.
A1 adjective/adverb /ˈɜːrli/

early

Meaning
before the usual or expected time
Example
She arrived early to the meeting.
C1 noun ˌes.kəˈleɪ.ʃən

escalation

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

exuberance

Meaning
the quality of being full of energy, excitement, and cheerfulness
Example
Her exuberance made the whole team feel motivated.
C1 verb /ˈiːvzdrɒp/

eavesdrop

Meaning
to secretly listen to a conversation
Example
She stood near the door to eavesdrop on their conversation.
B1 verb /ˈɛdjʊˌkeɪt/

educate

Meaning
to give knowledge, skills, or training to someone; to teach
Example
Parents should educate their children about healthy habits.
A2 noun/verb /ˌɛndʒɪˈnɪər/

engineer

Meaning
A person trained to design, build, or maintain engines, machines, or structures; to skillfully arrange or bring about.
Example
The engineer designed a new bridge across the river.
C2 adjective /ˌɛnkəˈmiːæstɪk/

encomiastic

Meaning
Expressing praise; laudatory.
Example
The book was filled with encomiastic remarks about the author.
C1 verb /ɪˈkɒnəmaɪz/

economize

Meaning
To reduce spending or use resources carefully.
Example
Families are trying to economize by cutting unnecessary expenses.
C2 adjective /ɪˈfiːt/

effete

Meaning
Lacking vitality, strength, or effectiveness; weak and overrefined.
Example
The empire became effete after centuries of indulgence.
B2 adjective ˌiːvəˈluːʃənəri

evolutionary

Meaning
Relating to or denoting the gradual development of something, especially from a simple to a more complex form.
Example
The evolutionary changes in species are fascinating.
C1 adjective ɪkˈskwɪzɪt

exquisite

Meaning
Extremely beautiful and delicate.
Example
The exquisite craftsmanship of the watch made it a collector's item.
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.
B2 adjective /ɪɡˈzɔː.stɪd/

exhausted

Meaning
Extremely tired; having no energy left.
Example
Feeling exhausted after waking up is common.
B2 verb /ɪˈlɛkt/

elect

Meaning
To choose someone for a position or office by voting.
Example
The citizens elected a new president.
C2 verb /ɛnˈfiːbəl/

enfeeble

Meaning
To make weak or feeble; to deprive of strength.
Example
The long illness enfeebled the old man.
C1 noun /ɪnˈtaɪərəti/

entirety

Meaning
the whole of something; the complete form
Example
He watched the movie in its entirety.
B2 adjective /ɪkˌsperɪˈmentl/

experimental

Meaning
based on untested ideas or techniques; relating to experiments or testing
Example
The scientists developed an experimental drug to treat cancer.
C1 noun /ˌɛtɪˈmɒlədʒi/

etymology

Meaning
The study of the origin of words and how their meanings and forms have evolved.
Example
The etymology of the word 'salary' comes from the Latin word for salt.
C1 verb ɪˈluː.sɪ.deɪt

elucidate

Meaning
make (something) clear; explain.
Example
The professor elucidated the theory with simple examples.
B1 noun /ˌiːkəˈnɒmɪks/ or /ˌɛkəˈnɒmɪks/

economics

Meaning
The study of production, consumption, and transfer of wealth.
Example
He is studying economics at university.
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 noun ˌiːkwəˈnɪməti

equanimity

Meaning
Mental calmness, composure, and evenness of temper, especially in a difficult situation.
Example
She handled the news with remarkable equanimity.
A2 noun /ˈɛndɪŋ/

ending

Meaning
the final part of something, such as a story, event, or period of time
Example
The movie had a surprising ending that no one expected.
B1 adjective ɪˈfek.tɪv

effective

Meaning
Successful in producing a desired or intended result; having the power to influence or produce a result.
Example
Effective policies drive organizational success.
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.
B1 noun /ɪkˈspens/

Expense

Meaning
the cost required for something; money spent on something
Example
The travel expense for the business trip was covered by the company.
B2 noun ˈiː.kəʊˌsɪs.təm

ecosystem

Meaning
A biological community of interacting organisms and their physical environment.
Example
A balanced ecosystem is crucial for environmental sustainability.
A1 verb /ɪnˈdʒɔɪ/

enjoy

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

egregious

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

euphoria

Meaning
A feeling or state of intense excitement and happiness; elation.
Example
Winning the championship brought a sense of euphoria.
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.
C1 noun /ɪɡˌzæm.ɪˈniː/

Examinee

Meaning
a person who is being tested in an examination
Example
Each examinee was given two hours to complete the test.
B2 adjective ˈeθ.ɪ.kəl

ethical

Meaning
Relating to moral principles or the branch of knowledge dealing with these.
Example
Ethical considerations guide decisions.
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.
C1 adjective ɪˌlektrəʊmæɡˈnetɪk

electromagnetic

Meaning
Relating to both electricity and magnetism or their interaction.
Example
Electromagnetic forces repel protons.
B2 noun ˈɛmpəθi

empathy

Meaning
The ability to understand and share the feelings of another person.
Example
Empathy helps students connect with society.
B2 noun ˌiːkəˈlɒdʒɪkəl ˈbæləns

ecological balance

Meaning
A state of dynamic equilibrium within a community of organisms.
Example
Maintaining ecological balance is essential for a sustainable planet.
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 /ɪkˈstɛnsəbl/

extensible

Meaning
able to be extended; capable of expansion.
Example
The software is designed to be extensible with new features.
B2 noun /ˈɜːnɪŋz/

earnings

Meaning
money obtained in return for labor or services
Example
Her monthly earnings are enough to support her family.
A2 noun/adjective /ˈekspɜːt/

expert

Meaning
a person who has a lot of knowledge or skill in a particular area
Example
He is an expert in computer programming.
A2 noun /ɪkˈskjuːs/

Excuse

Meaning
a reason or explanation put forward to defend or justify a fault or offense
Example
Being tired is not a valid excuse for not completing your homework.
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.
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.
B1 noun /ɪkˈstent/

Extent

Meaning
the area covered by something; the degree to which something has spread
Example
The extent of the damage caused by the flood was enormous.
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.
B2 verb /ɪˈnækt/

enact

Meaning
to make into law; to perform or act out
Example
The government decided to enact a new policy on education.
B2 adjective /ɪˈmɜːrdʒɪŋ/

emerging

Meaning
becoming known, developing, or starting to exist
Example
Bangladesh is one of the fastest emerging economies in the world.
C1 adjective /ɪnˈɡreɪnd/

engrained

Meaning
Firmly fixed or established; difficult to change.
Example
Cultural practices are often deeply engrained in the fabric of society.
B2 verb /ˈɛskɔrt/

escort

Meaning
to accompany someone; to guide or protect while going somewhere
Example
The guard escorted the visitor to the office.
B1 adverb /ɛtˈsɛtərə/

etcetera

Meaning
used at the end of a list to indicate that other similar items are included
Example
She bought apples, oranges, bananas, etcetera from the market.
C2 adjective /ˈɛstɪməbl/

estimable

Meaning
Worthy of great respect.
Example
Her estimable achievements inspired the whole community.