cataclysmic
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C1 adjective /ˌkætəˈklɪzmɪk/

cataclysmic

Meaning
Relating to or denoting a violent natural event or upheaval.
Example
The war had cataclysmic effects on the nation's economy.
B1 noun /ˈkɒtən/

cotton

Meaning
A soft white fibrous substance used to make cloth and thread.
Example
This shirt is made of pure cotton.
C1 adjective /ˌkɒmprɪˈhɛnsəbl/

comprehensible

Meaning
able to be understood; intelligible
Example
The teacher explained the topic in a comprehensible way.
B2 noun /ˈkɒntræktər/

contractor

Meaning
a person or company that agrees to provide materials or labor to perform a service or do a job
Example
The contractor completed the building project on time.
C2 noun /ˈkɒl.ə.kwi/

colloquy

Meaning
A formal conversation or dialogue, often on serious or academic topics.
Example
The professors engaged in a deep colloquy about the future of education.
B2 noun /ˈkɑn.trəˌvɜr.si/

Controversy

Meaning
prolonged public disagreement or heated discussion; a dispute or argument involving opposing viewpoints
Example
The new policy sparked a major controversy among the citizens.
C2 noun /ˈkloʊtʃər/

cloture

Meaning
a procedure for ending a debate and taking a vote.
Example
The Senate invoked cloture to end the lengthy debate.
C1 verb/noun /ˈkrɒn.ɪ.kəl/

chronicle

Meaning
To record events in the order in which they happened; a written record of historical events.
Example
She decided to chronicle her journey through a blog.
C1 noun /kəˈmændər ɪn tʃiːf/

Commander-in-chief

Meaning
the supreme leader of a nation's armed forces
Example
The president serves as the commander-in-chief of the military.
C2 adjective /kənˈtraɪt/

contrite

Meaning
feeling or showing remorse or guilt
Example
She was contrite after realizing her mistake.
A2 noun /tʃæns/

chance

Meaning
An opportunity or possibility of something happening.
Example
He took a chance and applied for the job.
C2 noun kənˌsep.tʃu.ə.laɪˈzeɪ.ʃən

conceptualization

Meaning
The process of forming a concept or idea; the process of developing something in the mind.
Example
The conceptualization of renewable cities is groundbreaking.
C2 noun /ˈkærɪt/

caret

Meaning
A proofreading symbol (^) used to indicate where something should be inserted.
Example
The editor placed a caret to show where the missing word should go.
B2 noun /koʊˈɪn.sɪ.dəns/

Coincidence

Meaning
a remarkable occurrence of events or circumstances without apparent causal connection; chance happening
Example
It was a strange coincidence that they both wore the same dress to the party.
C2 adjective /kəˈprɪʃəs/

capricious

Meaning
given to sudden and unaccountable changes of mood or behavior
Example
The stock market can be capricious, shifting dramatically without warning.
C1 adjective /kəˈlæpsəbl̩/

collapsible

Meaning
able to be folded down or reduced in size
Example
She bought a collapsible chair for camping.
C1 adjective /ˈkɔːrəl/

choral

Meaning
Relating to, written for, or performed by a choir or chorus.
Example
The church hosted a choral performance on Sunday.
B2 verb /ˈsɜːrkjəˌleɪt/

circulate

Meaning
to move continuously or freely through a closed system or area
Example
Air circulated freely in the open hall.
C1 verb /ˈkɒr.ə.leɪt/

correlate

Meaning
To have a mutual relationship or connection; to establish a relationship between two or more things.
Example
Researchers found that diet and mental health correlate strongly.
C2 verb /kəˈlʌmnieɪt/

calumniate

Meaning
To make false and damaging statements about someone; to slander.
Example
He was furious when he realized they had calumniated his reputation.
C1 adjective /ˈkrɛdɪtəbl/

creditable

Meaning
Deserving praise or acknowledgment, though not necessarily outstanding.
Example
She made a creditable effort in completing the project on time.
C1 noun /krɛst/

crest

Meaning
the top of a hill, wave, or mountain; a symbol of identity
Example
The hikers reached the crest of the mountain at sunrise.
C1 noun /kəmˈprɛʃn̩/

compression

Meaning
The act of pressing or squeezing something into a smaller space.
Example
File compression helps reduce storage requirements.
B2 noun /kənˈvɜː.ʃən/

Conversion

Meaning
The process of changing or causing something to change from one form to another.
Example
High website conversion rates indicate effective marketing.
C1 noun kəˈlɛktɪvɪzəm

collectivism

Meaning
The practice or principle of giving a group priority over each individual in it.
Example
Collectivism emphasizes the importance of group over individual interests.
B2 verb /kənˈsoʊl/

console

Meaning
to comfort someone who is sad or disappointed; to provide solace
Example
She tried to console her friend after the loss.
C1 adjective /ˈkɒnvɛks/

convex

Meaning
curved or rounded outward
Example
The lens has a convex shape to focus light.
B2 noun ˌkɒn.ekˈtɪv.ɪ.ti

connectivity

Meaning
The state of being connected or interconnected; the capacity for the interconnection of platforms, systems, and applications.
Example
Improved connectivity boosts economic development.
B2 adjective /ˈkeər.friː/

Carefree

Meaning
free from anxiety or responsibility; lighthearted; worry-free
Example
She lived a carefree life, traveling the world without any worries.
C1 adjective/verb /ˈkɒn.sə.mət/

consummate

Meaning
To complete or perfect something with great skill
Example
He is a consummate artist with years of experience.
C2 adjective /kəˈmoʊdiəs/

commodious

Meaning
spacious and comfortable; having plenty of room
Example
They rented a commodious apartment in the city.
B1 verb /kənˈsɪst/

consist

Meaning
to be made up or composed of certain parts or elements
Example
The committee consists of five members.
C1 noun /krʌtʃ/

crutch

Meaning
a support used by someone injured to walk; also something relied upon for support or help
Example
He had to use crutches after breaking his leg.
B2 adjective /ˈkaʊntləs/

countless

Meaning
too many to be counted; innumerable
Example
There are countless stars in the sky.
C2 adjective /kəˈkɒfənəs/

cacophonous

Meaning
Producing a harsh, discordant mixture of sounds.
Example
The cacophonous sounds of the city kept her awake all night.
A1 noun /kəmˈpjuːtə(r)/

computer

Meaning
an electronic device for storing and processing data
Example
I bought a new computer for my office work.
C2 noun /ˈkʌvi/

covey

Meaning
a small group of birds, especially partridges or quails
Example
A covey of quails flew across the field.
B1 adverb /ˈkeərləsli/

carelessly

Meaning
without care or attention; in a negligent or reckless manner
Example
He carelessly left the door unlocked.
A2 adjective /kəˈneɪdiən/

canadian

Meaning
Relating to Canada or its people.
Example
She enjoys Canadian culture and traditions.
B2 verb /ˈkeɪtər/

cater

Meaning
To provide food, drinks, or services, usually for an event or group.
Example
The company catered the wedding reception.
C1 adjective, verb, noun /ˈkaʊntərfɪt/

counterfeit

Meaning
made to look like something genuine in order to deceive
Example
The police seized a batch of counterfeit currency.
B2 noun ˌkætəˈstrɒfɪk ɪˈvents

catastrophic events

Meaning
Extremely destructive or damaging events that cause widespread devastation.
Example
Cyclones are catastrophic events in Bangladesh.
A1 noun /ˈkʌl.ər/

Colour

Meaning
the property possessed by an object of producing different sensations on the eye as a result of the way it reflects light; hue, tint, shade
Example
What is your favorite colour for painting the bedroom walls?
A2 noun /kæb/

cab

Meaning
a taxi or car for hire with a driver
Example
We took a cab to the airport.
B2 noun /kənˈstreɪnt/

constraint

Meaning
a limitation or restriction
Example
Time is the biggest constraint in completing the project.
C1 phrase ˌkæt.əˈɡɒr.ɪ.kəl.i rɪˈfjuː.tɪd

categorically refuted

Meaning
Completely and absolutely denied or disproved.
Example
The claims were categorically refuted by officials.
C2 verb /ˌkɒntrəˈvɜːrt/

controvert

Meaning
to dispute or argue against; to contradict
Example
The scientist controversed the previous research findings.
C1 verb /kənˈvɜːrdʒ/

converge

Meaning
to come together from different directions; to meet at a point
Example
The roads converge at the city center.
C1 noun /ˈsɪtrɪk ˈæsɪd/

Citric Acid

Meaning
a natural acid found in citrus fruits, used as a food preservative and flavoring agent
Example
Add a pinch of citric acid to preserve the color of the fruit jam.
B1 noun /kəˈrɛkʃən/

correction

Meaning
the action or process of correcting something
Example
The teacher made a correction to the student's essay.
C1 verb /kənˈviːn/

convene

Meaning
to come together or assemble, especially for a meeting or formal gathering
Example
The board will convene tomorrow to discuss the new policy.
C2 noun /ˈkaɪrəˌmænsi/

chiromancy

Meaning
The practice of predicting the future by interpreting the lines on the palms of hands; palmistry.
Example
The old woman practiced chiromancy and told fortunes for travelers.
C1 noun ˌkɒn.əˈteɪ.ʃən

connotation

Meaning
The implied or suggested meaning of a word beyond its literal definition
Example
The word 'home' has a warm connotation of comfort and family.
A2 noun /ˈkrɪk.ɪt/

Cricket

Meaning
a jumping insect that makes a chirping sound by rubbing its wings together
Example
We could hear crickets chirping in the evening.
B2 noun /kraɪˈtɪəriən/

criterion

Meaning
A standard or rule used to make a judgment or decision.
Example
Honesty is an important criterion for this job.
C2 adjective /ˈklæmərəs/

clamorous

Meaning
making a loud and confused noise; expressing strong demands noisily
Example
The clamorous audience demanded an encore from the band.
B2 adjective /ˈklɪn.ɪ.kəl/

clinical

Meaning
Related to the observation and treatment of patients rather than theoretical study.
Example
The doctor conducted a clinical examination.
C1 noun /kəˈnʌn.drəm/

conundrum

Meaning
A complex problem or puzzle without an easy solution
Example
The ethical conundrum puzzled the researchers.
B2 noun /kəmˈplek.ʃən/

Complexion

Meaning
the natural color, texture, and appearance of a person's skin, especially on the face
Example
Her fair complexion glowed beautifully in the morning sunlight.
A1 verb /kliːn/

clean

Meaning
To make something free from dirt, marks, or mess.
Example
She cleaned the kitchen before the guests arrived.
C1 verb /ˈkɒŋɡrɪɡeɪt/

congregate

Meaning
to gather together in a group; to assemble
Example
People congregate in the town square every evening.
C1 verb /ˈsɪvɪlaɪz/

civilize

Meaning
to bring a society or group to a more developed, organized, or socially acceptable state; to educate and refine behavior
Example
Education can help civilize communities by promoting shared values and respect.
B2 noun /kəˈmɪʃənər/

commissioner

Meaning
an official in charge of a particular department or area
Example
The police commissioner addressed the media about the incident.
C2 adjective /kəˈnaɪ.vɪŋ/

conniving

Meaning
secretly scheming or plotting to help in wrongdoing
Example
He is a conniving politician who manipulates people for power.
B2 verb /kənˈfaɪn/

confine

Meaning
to restrict someone or something within certain limits; to keep someone in a closed space
Example
The prisoner was confined to his cell for 23 hours a day.
C1 noun /kəˈloʊkwiəˌlɪzəm/

colloquialism

Meaning
a word or phrase used in informal speech or writing
Example
The novel is full of regional colloquialisms.
C1 adjective ˌkaʊntəprəˈdʌktɪv

counterproductive

Meaning
Having the opposite of the desired effect; tending to hinder rather than help.
Example
Counterproductive activities often stem from dissatisfaction.
A2 verb /kaʊnt/

count

Meaning
to determine the total number of something
Example
She carefully counted the money on the table.
C2 verb /kɔːk/

calk

Meaning
To make a boat or ship watertight by filling seams or cracks.
Example
The workers calked the seams of the old boat to prevent leaks.
B2 noun /ˌkɔːriˈændər/

Coriander

Meaning
aromatic herb with feathery leaves used for flavoring food; also refers to the seeds used as spice
Example
Fresh coriander leaves are sprinkled on top of the curry.
B2 noun /ˈklʌstər/

cluster

Meaning
a group of similar things or people positioned close together
Example
The grapes grew in a tight cluster.
B2 noun /ˌkoʊəˈlɪʃən/

coalition

Meaning
a temporary alliance of distinct parties, persons, or states for joint action
Example
Several parties formed a coalition to pass the new law.
B2 noun /ˈkaʊntərˌpɑːrt/

counterpart

Meaning
a person or thing that corresponds to or has the same function as another
Example
The CEO met with his counterpart in the partner company.
C2 verb /ˈtʃɔːrtl/

chortle

Meaning
to laugh in a breathy, gleeful way
Example
The audience chortled at the comedian's witty remarks.
C1 noun /kənˈsep.ʃən/

Conception

Meaning
the forming of an idea or plan; the fertilization of an ovum by a sperm; the action of conceiving
Example
The conception of this innovative project took several months of brainstorming.
A2 noun /ˈkloʊðɪŋ/

clothing

Meaning
items worn to cover the body; apparel collectively
Example
Warm clothing is essential in winter.
B2 noun /ˈkɒmpɪtəns/

competence

Meaning
the ability to do something successfully or efficiently
Example
Her competence as a manager impressed the board.
B1 noun /kəmˈpær.ɪ.sən/

Comparison

Meaning
the act of examining the similarities and differences between two or more things
Example
The teacher made a comparison between the two poems to show their different styles.
B2 noun, verb /kloʊk/

cloak

Meaning
a loose outer garment; to cover, hide, or disguise
Example
The spy cloaked his identity with a false name.
C2 adjective /ˈsɪlieɪtɪd/

ciliated

Meaning
Having minute hairlike projections (cilia) on the surface of cells or organisms.
Example
The ciliated cells in the respiratory tract help move mucus out of the lungs.
B2 noun /ˈkɒmjʊnɪst/

communist

Meaning
a person who supports or believes in the principles of communism
Example
The communist ideology aims for a classless society.
B2 noun ˌkɒm.prɪˈhɛn.ʃən

comprehension

Meaning
The ability to understand something; understanding or grasp of knowledge.
Example
Reading improves vocabulary and comprehension skills.
C2 noun /ˌkæt ə ˈnaɪn ˌteɪlz/

cat-o-nine-tails

Meaning
A whip with nine knotted cords, historically used for punishment.
Example
The sailor feared the cat-o-nine-tails more than the storm at sea.
B1 noun /ˈkaʊn.səl/

council

Meaning
an assembly of people chosen or elected to make decisions or advise on matters
Example
The city council voted to improve public transportation.
B1 noun /kənˈsʌltənt/

consultant

Meaning
A professional who provides expert advice in a particular area.
Example
The company hired a consultant to improve its marketing strategy.
C2 noun /kənˈtɔːrʃənz/

contortions

Meaning
plural form of contortion; multiple twisted or bent shapes
Example
The magician's contortions left the crowd in awe.
C2 verb /kənˈsɪlieɪt/

conciliate

Meaning
to stop someone from being angry; to win over by friendly acts
Example
He tried to conciliate the angry customer with an apology.
B2 adjective /ˌkrɒnəˈlɒdʒɪkəl/

chronological

Meaning
Arranged in the order in which events happened.
Example
The events were listed in chronological order.
B1 verb /kənˈtrɪbjuːt/

contribute

Meaning
to give something, especially money, time, or effort, to help achieve or provide something
Example
Everyone contributed money to buy a farewell gift for the teacher.
A2 verb /kəmˈpleɪn/

complain

Meaning
to express dissatisfaction or annoyance about something
Example
He often complains about the noise in the neighborhood.
C1 verb, noun /klɑːɡ/

clog

Meaning
to block or become blocked; a type of heavy wooden shoe
Example
The sink was clogged with food waste.
A2 verb /ˈkænsəl/

cancel

Meaning
to decide that something planned will not take place
Example
The flight was canceled due to heavy rain.
C1 adjective /ˈkɜːrsəri/

cursory

Meaning
Hasty and therefore not thorough or detailed.
Example
He gave the report only a cursory glance before the meeting.
C2 verb /kəˈriːn/

careen

Meaning
To move swiftly and in an uncontrolled way, especially in a specific direction.
Example
The car careened down the slippery road.
B2 noun /kraɪst/

christ

Meaning
the title given to Jesus, considered the Messiah in Christianity
Example
Christ is central to Christian faith.
B2 noun kənˈtrækʃən

contraction

Meaning
The process of becoming smaller; a decrease in size or quantity.
Example
The economic contraction resulted in a rise in unemployment.
C1 noun /tʃɪt/

Chit

Meaning
a short note, typically a brief informal letter; a voucher for a sum owed
Example
She left a chit on the table asking him to call her back.
B1 noun /tʃest/

Chest

Meaning
the front surface of a person's or animal's body between the neck and abdomen; a large strong box
Example
The doctor listened to his chest with a stethoscope.
B1 noun /ˈker.ləs.nəs/

Carelessness

Meaning
failure to give sufficient attention to avoiding harm or errors
Example
His carelessness with money led to serious financial problems.
B1 adjective /kəmˈbaɪnd/

combined

Meaning
formed by bringing together separate parts or elements
Example
The combined effort of the team led to success.
C1 adjective /kəmˈpleɪsənt/

complacent

Meaning
showing self-satisfaction and a lack of concern about potential dangers or problems
Example
The team grew complacent after a few victories and stopped practicing hard.
B2 noun /ˌsɜːrtɪfɪˈkeɪʃən/

certification

Meaning
the process of officially recognizing or confirming that something or someone meets required standards; an official document proving qualification
Example
She received her professional certification after completing the training program.
C1 noun /ˈkleɪmənt/

claimant

Meaning
a person who makes a claim, especially in a legal or financial context
Example
The claimant filed for compensation after the accident.
B2 verb /kəmˈpoʊz/

compose

Meaning
to create music or writing; to make up; to calm oneself
Example
She composes beautiful songs.
A1 verb /kɔːst/

cost

Meaning
to have a price of; to require payment; to cause loss
Example
This book will cost twenty dollars.
A2 noun, verb /tʃɪp/

chip

Meaning
A small piece broken off from something; or to cut or break a small piece from something.
Example
He accidentally chipped the edge of the table.
C1 noun /klaʊt/

clout

Meaning
influence or power, especially in politics or business
Example
The businessman has a lot of political clout.
B2 verb /ˈkɒmpənseɪtɪd/

compensated

Meaning
to have been given something, typically money, as a recompense for loss, suffering, or work done
Example
The workers were compensated for their overtime hours.
A2 noun /ˌkɒnvəˈseɪʃn/

conversation

Meaning
an informal talk between two or more people, in which ideas, feelings, and thoughts are exchanged
Example
We had a long conversation about future plans.
B1 verb /tʃɒp/

chop

Meaning
to cut with a sharp tool; to cut into pieces
Example
She chops vegetables for dinner.
B2 noun/verb /kəˈmjuː.tɪŋ/

commuting

Meaning
Regular travel to and from workplace, daily journey for work.
Example
He spends two hours commuting to work every day.
B2 noun ˈkɛmɪkəl weɪst

chemical waste

Meaning
Waste material from industrial or laboratory processes that contains harmful chemicals.
Example
Chemical waste pollutes water bodies.
B1 adjective /ˈkeɪ.pə.bəl/

Capable

Meaning
having the ability, fitness, or quality necessary to do or achieve something; competent
Example
She is capable of handling complex problems.
B1 noun /ˈkɑn.fɪ.dəns/

Confidence

Meaning
the feeling or belief that one can rely on someone or something; firm trust; self-assurance
Example
She spoke with great confidence during the job interview.
B2 noun /kəmˈpɑːrt.mənt/

Compartment

Meaning
a separate section or division of a larger space, especially in a train
Example
We found seats in the first-class compartment.
C1 verb /kəmˈprɛs/

compress

Meaning
to press or squeeze something so that it becomes smaller
Example
The file was compressed to save storage space.
C2 adjective /ˌkloʊs ˈhɔːld/

close-hauled

Meaning
of a sailing ship, sailing as nearly as possible towards the direction from which the wind is blowing.
Example
The yacht was close-hauled as it cut through the waves.
B1 noun /sɛl/

cell

Meaning
a small basic unit of life; or a small enclosed space like a prison room
Example
The prisoner was locked in a small cell.
B2 verb /koʊˈɔːrdɪˌneɪt/

coordinate

Meaning
to organize people or things so that they work together effectively
Example
We need to coordinate our efforts to finish the project on time.
B1 noun /kəmˈpleɪnt/

complaint

Meaning
a statement that something is wrong or not satisfactory
Example
The manager received a complaint from a customer about poor service.
A2 noun /klʌb/

club

Meaning
an organization of people with a common interest; also a place for social gatherings or entertainment
Example
He joined the local tennis club to meet new people.