air pollution
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B1 noun /ɛr pəˈluːʃən/

air pollution

Meaning
The presence of harmful or poisonous substances in the air, typically caused by industrial processes, vehicle emissions, or other human activities.
Example
Air pollution from factories led to the first environmental movement.
B2 verb/adjective /ɑːrˈtɪkjʊlət/

articulate

Meaning
to express thoughts or ideas clearly; having the ability to speak fluently and clearly
Example
She was able to articulate her ideas during the meeting.
B2 noun/verb /eɪp/

ape

Meaning
a large primate similar to a monkey but without a tail; as a verb, to imitate or mimic
Example
Children often ape the behavior of adults.
C2 verb /æbˈdʒʊər/

abjure

Meaning
to formally renounce or give up a belief, cause, or claim
Example
He abjured his allegiance to the old regime.
C1 noun /ˈænərki/

anarchy

Meaning
a state of disorder due to the absence or failure of government or authority
Example
The collapse of the regime led to anarchy in the streets.
C1 verb /ədˈmɪnɪstreɪt/

administrate

Meaning
to manage or supervise the execution of duties, laws, or resources; to formally give or apply something such as a test or medicine
Example
The committee will administrate the new policy across all departments.
C2 verb /ˈæsəneɪt/

assonate

Meaning
To correspond or agree in sound, especially by vowel sounds; to rhyme approximately.
Example
The lines assonate beautifully, giving the song a unique flow.
C1 noun /əˌsæsɪˈneɪʃən/

assassination

Meaning
The act of killing someone important, often for political or ideological reasons.
Example
The assassination of the president shocked the nation.
C2 adjective /ˌæf.əˈrɪs.tɪk/

aphoristic

Meaning
expressed in the style of a short, witty saying
Example
Her writing style is concise and aphoristic.
C2 adjective /ˌækwiˈɛsənt/

acquiescent

Meaning
ready to accept something without protest, or to do what someone else wants
Example
He gave an acquiescent smile and agreed to the plan.
B1 adjective /ˈɔːkwəd/

awkward

Meaning
causing or feeling embarrassment; difficult to deal with
Example
There was an awkward silence after his joke.
C1 adjective /əˈɡæst/

aghast

Meaning
filled with shock or horror
Example
The audience was aghast at the tragic scene.
B2 noun ɔːɡˈmɛn.tɪd riˈæl.ɪ.ti

augmented reality

Meaning
Technology that overlays digital information on the real world environment.
Example
Gaming has been transformed by augmented reality.
C1 noun ˈæk.si.əm

axiom

Meaning
A statement or principle that is considered true and does not require proof.
Example
Actions speak louder than words is a well-known axiom.
A1 adjective /əˈfreɪd/

afraid

Meaning
feeling fear or anxiety; worried that something undesirable will happen
Example
She was afraid of the dark.
B2 adjective /ˈærəɡənt/

Arrogant

Meaning
having an exaggerated sense of one's importance; proud
Example
His arrogant behavior made him very unpopular.
C2 noun/adjective /ˈæl.əˌbæs.tər/

alabaster

Meaning
A fine-grained, usually white variety of gypsum, often used for carving; also describes something smooth and pale like alabaster.
Example
The statue was carved from pure alabaster.
C2 adjective /əˈpɜːrtənənt/

appurtenant

Meaning
Belonging to or associated with something, often used in legal/property contexts.
Example
The right of way is appurtenant to the landowner’s property.
B1 noun əˈwɛrnɪs

Awareness

Meaning
Knowledge or understanding about important issues, particularly environmental conservation.
Example
Spreading awareness is essential to save butterflies.
C1 adjective /əˈluːf/

aloof

Meaning
Not friendly or forthcoming; cool and distant.
Example
He remained aloof during the entire discussion.
B1 noun /əˈsɛmbli/

assembly

Meaning
a group of people gathered together for a common purpose or the act of putting parts together to form something
Example
The school held an assembly to discuss the new rules.
A1 verb /æd/

add

Meaning
to join something to something else; to include
Example
Please add sugar to my coffee.
B2 adverb /ˌɑːrtɪˈfɪʃəli/

Artificially

Meaning
by artificial means; not naturally; in a fake manner
Example
The lake was artificially created for irrigation purposes.
C1 noun /ˈædʒʌŋkt/

adjunct

Meaning
a thing added to something else as a supplementary part
Example
The professor worked as an adjunct at the university.
C2 adjective /əˈstrɪndʒənt/

astringent

Meaning
sharp or severe in manner or style; also describes a substance that contracts skin or body tissues
Example
Her astringent tone silenced the noisy class.
C1 noun /ˈæbsɛs/

abscess

Meaning
A swollen area within body tissue containing pus, usually caused by infection.
Example
The dentist treated the abscess in his tooth.
B2 noun /ədˈvɛntʃərər/

adventurer

Meaning
a person who seeks exciting, risky, or unusual experiences; someone who explores new or unknown places
Example
The adventurer traveled deep into the jungle in search of ancient ruins.
C2 noun, adjective /ˌæntiˌspæzˈmɒdɪk/

antispasmodic

Meaning
A drug or agent that relieves or prevents muscle spasms.
Example
The doctor prescribed an antispasmodic to ease the pain.
A2 verb /əˈpɒlədʒaɪz/

apologize

Meaning
to say sorry for something wrong you have done
Example
He apologized for being late to the meeting.
B2 adjective /ænˈtɑːrktɪk/

antarctic

Meaning
relating to the region around the South Pole
Example
The Antarctic region is known for its extreme cold and icy landscapes.
C1 adjective /əˌpɒk.əˈlɪp.tɪk/

apocalyptic

Meaning
Describing the end of the world, or something catastrophic and disastrous.
Example
The movie depicts an apocalyptic future after a nuclear war.
B2 adjective /əˈpærənt/

apparent

Meaning
Clearly visible or understood; obvious.
Example
It soon became apparent that he was not telling the truth.
C2 noun /ˈɔːɡjʊri/

augury

Meaning
A sign or omen that is believed to predict future events.
Example
The dark clouds were seen as an augury of an approaching storm.
B2 verb /əˈvɜːrt/

avert

Meaning
to prevent something bad from happening or to turn away one's eyes or thoughts
Example
Quick action helped avert a disaster.
A2 verb /ˈædɪd/

added

Meaning
to join something to something else to increase its size, number, or amount
Example
She added sugar to her coffee.
C2 noun /əˈbeɪəns/

abeyance

Meaning
a state of temporary suspension or inactivity
Example
The project was held in abeyance until funds became available.
C2 noun /ˈæpəˌsteɪt/

apostate

Meaning
A person who renounces a religious or political belief or principle.
Example
He was labeled an apostate after abandoning the faith of his community.
B1 verb /əˈfɛkt/

affect

Meaning
to influence or make a difference to something
Example
The weather can greatly affect our mood.
C2 adjective /əˈkjuː.zəˌtɔːr.i/

accusatory

Meaning
Suggesting blame or indicating someone has done wrong.
Example
He gave her an accusatory glance.
C1 noun ˈæ.sɛt ˌæl.əˈkeɪ.ʃən

asset allocation

Meaning
An investment strategy that aims to balance risk and reward by apportioning a portfolio's assets according to an individual's goals, risk tolerance, and investment horizon.
Example
Proper asset allocation is key to financial growth.
C1 adjective /əˈdɛpt/

adept

Meaning
Very skilled or proficient at something.
Example
She is adept at solving complex mathematical problems.
C1 verb /əˈnʌl/

annul

Meaning
to declare something legally invalid or cancel it
Example
The court decided to annul the marriage due to fraud.
B2 noun əˌpriː.ʃiˈeɪ.ʃən

appreciation

Meaning
An increase in the value of an asset over time.
Example
Real estate properties often experience appreciation over time.
C2 noun əˈdrɔɪt.nəs

adroitness

Meaning
Cleverness or skill, especially in using the hands or mind; skillful dexterity.
Example
His adroitness in negotiations secured the deal.
B1 noun əˈreɪndʒmənt

arrangement

Meaning
The way things are organized, positioned, or structured.
Example
The arrangement of protons in the nucleus is critical.
C2 adjective /əˈbɔːrtɪv/

abortive

Meaning
Failing to produce the intended result; unsuccessful.
Example
Their abortive attempt to climb the mountain ended in retreat.
B2 noun /ˈækni/

acne

Meaning
a skin condition in which pores become inflamed and clogged, causing pimples and spots
Example
Regular cleansing and a balanced diet can help reduce acne.
B1 noun /ˈæŋkəl/

ankle

Meaning
the joint connecting the foot with the leg
Example
He twisted his ankle while playing football.
C1 noun /ɔːˈtɒmətən/

automaton

Meaning
A machine that works automatically; also refers to a person who behaves like a machine, without thinking.
Example
He worked like an automaton, without showing any emotion.
C2 noun /ˌænəlˈdʒiːziə/

analgesia

Meaning
The inability to feel pain while still conscious.
Example
The doctor induced analgesia before performing the procedure.
B1 verb /əˈsɛs/

assess

Meaning
to evaluate or estimate the nature, ability, or quality of something
Example
The teacher assessed the students' progress.
A2 noun ədˈvɛnʧər

Adventure

Meaning
An unusual and exciting experience or activity that is typically bold and sometimes risky.
Example
Adventure travel is loved by thrill-seekers.
A2 noun /ˈæk.ʃənz/

actions

Meaning
The fact or process of doing something, typically to achieve an aim.
Example
Immediate actions are needed for pollution control.
A2 noun/verb /əˈmaʊnt/

amount

Meaning
a quantity of something, typically the total of a thing or things in number, size, value, or extent
Example
The total amount of money is not enough.
C1 adjective ɔːˈspɪʃ.əs

auspicious

Meaning
Favorable or bringing good luck and success
Example
The wedding was held on an auspicious day.
B2 noun /eɪk/

Ache

Meaning
a continuous or prolonged dull pain in a part of one's body
Example
He had a terrible headache after working late.
B2 adverb /əˈproʊpriətli/

appropriately

Meaning
in a way that is suitable or proper for a particular situation
Example
She was dressed appropriately for the event.
C1 noun /ˈɑːrmfʊl/

armful

Meaning
As much as can be carried in one or both arms.
Example
She carried an armful of books into the library.
B2 adjective, noun, verb /ˈæb.strækt/

abstract

Meaning
existing in thought or as an idea but not having physical or concrete existence; a summary of a text
Example
The artist is known for her abstract paintings.
C2 noun /ˌædʒʊˈreɪʃən/

adjuration

Meaning
a solemn urging or appeal
Example
The priest made an adjuration for peace and unity.
C1 noun /əˈseɪlənt/

assailant

Meaning
a person who attacks another
Example
The police arrested the assailant at the scene.
B2 noun /əˈstɒnɪʃmənt/

astonishment

Meaning
Great surprise or amazement.
Example
She looked at the magician with astonishment.
C1 verb /əˈbriːvieɪt/

abbreviate

Meaning
To shorten a word, phrase, or text by leaving out letters or parts.
Example
We often abbreviate 'Doctor' to 'Dr'.
C2 noun /ˈɔːldər/

alder

Meaning
A type of tree from the birch family that typically grows in wet ground and has simple, serrated leaves.
Example
The alder trees grew thick along the riverbank.
C2 noun /ˈæpəfθɛm/

apophthegm

Meaning
A short, pithy, and instructive saying or maxim.
Example
She always had a witty apophthegm to share at meetings.
C1 verb /əˈluːd/

allude

Meaning
To refer to something indirectly or casually.
Example
The professor alluded to Shakespeare during the lecture.
B1 noun ˌɑː.tɪˈfɪʃ.əl ɪnˈtɛl.ɪ.dʒəns

artificial intelligence

Meaning
The theory and development of computer systems able to perform tasks normally requiring human intelligence.
Example
Artificial intelligence is revolutionizing education through smart tutoring.
C2 noun /ˈɑːrtləsnəs/

artlessness

Meaning
The quality of being natural and simple without deceit or pretension.
Example
Her artlessness made her beloved by all.
A2 noun /əˈtɛnʃən/

attention

Meaning
the act of focusing on something or someone
Example
The teacher asked for the students' attention.
B2 noun /ˈæɡ.ə.ni/

Agony

Meaning
extreme physical or mental suffering; intense pain
Example
He was in agony after the accident.
A1 adjective, adverb /əˈloʊn/

alone

Meaning
having no one else present; on one's own
Example
She prefers to live alone in her apartment.
C1 noun /ˈæk.jʊ.mən/

acumen

Meaning
The ability to make good judgments and quick decisions; keenness and depth of perception.
Example
His business acumen helped the company grow rapidly.
B2 adjective /ˈænɪmeɪtɪd/

animated

Meaning
Full of life or excitement; made using animation techniques.
Example
The animated film was loved by children and adults alike.
B2 noun /ˈædvərtaɪzər/

advertiser

Meaning
a person or company that advertises a product, service, or event
Example
The advertiser paid millions for a Super Bowl commercial spot.
A2 adverb /ˈɛniweɪ/

anyway

Meaning
used to emphasize a statement or to return to a previous subject; regardless of what happened
Example
I was tired, but I went to the meeting anyway.
C1 noun /ədˈmɪtəns/

admittance

Meaning
the process or fact of entering or being allowed to enter a place
Example
No admittance without a valid ticket.
C1 noun /əˈbændənmənt/

abandonment

Meaning
the act of leaving someone or something behind completely; the state of being deserted
Example
The child suffered deep emotional pain because of abandonment.
B2 adjective /ˈɑːrbɪˌtrɛri/

arbitrary

Meaning
based on random choice or personal whim, rather than reason or system
Example
The teacher's arbitrary grading upset many students.
B2 adjective /ˈædvɜːrs/

Adverse

Meaning
harmful; unfavorable; opposing; negative
Example
The adverse weather conditions forced them to cancel the event.
C2 noun /ˌæntɪˈtɒksɪn/

antitoxin

Meaning
A substance that neutralizes a specific toxin in the body.
Example
The doctor administered an antitoxin to counter the snake venom.
B2 noun /ˈɑːrm.pɪt/

Armpit

Meaning
the hollow area under the arm where it joins the shoulder
Example
He applied deodorant to his armpit.
C1 adjective /ˌeɪ.bəlˈbɒd.id/

able-bodied

Meaning
physically strong and healthy, not disabled
Example
The company is looking for able-bodied workers for the construction site.
A1 adverb /əˈraʊnd/

Around

Meaning
in a circle; on all sides; in the vicinity; approximately
Example
Look around and you will see many beautiful flowers.
B2 adjective /əˈdɪktɪd/

addicted

Meaning
Being unable to stop engaging in a particular activity or consuming a particular substance.
Example
Many people are addicted to social media.
B2 noun ˈæsɛt

asset

Meaning
A useful or valuable thing, person, or quality.
Example
Real estate is one of the most valuable assets.
B2 adverb /əˈlɔːŋ.saɪd/

Alongside

Meaning
beside; next to; together with
Example
She walked alongside her friend through the park.
B2 adjective /æbˈnɔːr.məl/

abnormal

Meaning
deviating from what is normal or usual, typically in a way that is undesirable
Example
The doctor noticed an abnormal growth in the patient’s lung.
B2 adverb /ˈædɪkwətli/

adequately

Meaning
in a satisfactory manner
Example
He completed the task adequately, but could improve next time.
B2 noun /əˈsaɪləm/

asylum

Meaning
Protection or shelter, especially given to refugees or the mentally ill.
Example
The refugees sought asylum in the neighboring country.
C1 noun /ɔːˈrɔːrə/

aurora

Meaning
A natural display of lights in the sky, usually seen in polar regions.
Example
We traveled to Norway to see the northern aurora.
C2 verb /ˈæmbl/

amble

Meaning
To walk at a slow, relaxed pace.
Example
They amble through the park on Sunday mornings.
C1 noun /ˌɑːrtʃˈbɪʃəp/

archbishop

Meaning
A senior bishop in charge of an archdiocese in the Christian Church.
Example
The archbishop delivered a sermon to thousands of people.
B2 noun /ɔː/

awe

Meaning
a feeling of deep respect mixed with fear or wonder
Example
The children looked at the fireworks in awe.
A1 noun/verb /eɪdʒ/

age

Meaning
The length of time that a person has lived; to grow older.
Example
She asked his age politely.
C2 verb /əˈkuːtər/

accouter

Meaning
to equip or outfit, typically with military or ceremonial attire
Example
The soldiers were accoutered in full battle gear.
A2 noun /æd/

ad

Meaning
a notice or announcement in a public medium promoting a product, service, or event
Example
The company released a new ad for their smartphone.
B2 verb /əˈkʌstəm/

accustom

Meaning
to make someone familiar with something through regular experience or use
Example
It took him a while to accustom himself to the new environment.
A2 verb /əˈreɪndʒ/

arrange

Meaning
to organize or put in order; to plan or prepare
Example
She arranged the flowers in a vase.
C2 noun /ˌæpəˈzɪʃən/

apposition

Meaning
a grammatical construction in which two elements are placed side by side, with one explaining the other
Example
In the phrase 'my friend John,' the word 'John' is in apposition to 'my friend.'
B2 adjective ədˈmɪn.ɪ.strə.tɪv

administrative

Meaning
Relating to the running of a business, organization, etc.; concerned with or relating to management or administration.
Example
Administrative reforms improve efficiency.
B1 adjective ˌɑː.tɪˈfɪʃ.əl

artificial

Meaning
Made by humans; not occurring naturally
Example
Artificial systems are transforming industries.
B2 noun /æʃ/

ash

Meaning
the powdery residue left after the burning of a substance
Example
After the fire, only ash remained of the house.
C1 noun /ˈɔːtəkræt/

autocrat

Meaning
A ruler with absolute power.
Example
The autocrat controlled the country with an iron fist.
B2 noun /ˌɔːltəˈreɪʃən/

alteration

Meaning
a change or modification made to something
Example
The tailor made an alteration to the suit.
B2 noun ˈæɡ.rɪ.kʌl.tʃɚ

agriculture

Meaning
The science or practice of farming, including cultivation of the soil for the growing of crops and the rearing of animals to provide food, wool, and other products.
Example
Sustainable agriculture can help protect the environment.
B2 adjective /ˌæbsənt ˈmaɪndɪd/

absent-minded

Meaning
often forgetting things or not paying attention
Example
He is so absent-minded that he often forgets his keys.
B1 noun /ˈeər fɔːrs/

Air force

Meaning
the military organization of a country that uses aircraft for fighting
Example
The air force conducted a training exercise over the mountains.
C1 adverb /ˈæm.ɪ.kə.bli/

Amicably

Meaning
in a friendly way without anger or resentment
Example
The divorce was settled amicably between both parties.
C2 verb /ˈæktʃueɪt/

actuate

Meaning
to put into action or motion; to motivate or activate
Example
The engineer actuated the machine with a simple switch.
B2 noun ɔːˈtɒnəmi

autonomy

Meaning
The right or condition of self-government; freedom from external control or influence.
Example
Autonomy was a primary demand.
B2 adjective /ˌæn.tiˈsoʊ.ʃəl/

Antisocial

Meaning
avoiding social interaction; hostile to social order
Example
His antisocial behavior made it difficult for him to make friends.
C1 adjective /ɔːˈstɪə/

austere

Meaning
Severe or strict in manner, attitude, or appearance; plain and simple.
Example
The monk lived an austere life in the mountains.
A2 adverb /əˈhɛd/

ahead

Meaning
in front; in advance; before someone or something in position or progress
Example
She walked ahead of the group.
B2 adjective əˈstɒnɪʃɪŋ

astonishing

Meaning
Extremely surprising or impressive; amazing.
Example
The astonishing discovery changed the way we view the universe.
B2 adverb /əˈfek.ʃən.ət.li/

Affectionately

Meaning
in a way that shows feelings of liking or love; with fondness and care
Example
She hugged her grandmother affectionately.
B2 noun /əkˈnɒlɪdʒmənt/

acknowledgement

Meaning
the act of recognizing or accepting something as true or valid; an expression of gratitude or recognition
Example
She received an acknowledgement for her contribution to the project.
B2 adjective /əkˈsel.ə.reɪ.tɪd/

accelerated

Meaning
Happening or developing faster than usual.
Example
The project progressed at an accelerated pace.
B2 adjective /əˈbjuːsɪv/

abusive

Meaning
extremely offensive or insulting; involving physical or verbal harm
Example
She left her job because of her abusive boss.
C1 noun /əˈbɪs/

abyss

Meaning
a deep, immeasurable space, chasm, or void; something seemingly without end
Example
The climbers looked down into the dark abyss below.
B2 adjective ˌæɡ.rɪˈkʌl.tʃər.əl

agricultural

Meaning
Connected with farming.
Example
Agricultural advancements enhance food security.
C2 noun /əˈnæθəmə/

anathema

Meaning
something or someone intensely disliked or strongly condemned
Example
Violence is anathema to her peaceful nature.