challenging
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B1 adjective /ˈtʃælɪndʒɪŋ/

challenging

Meaning
difficult in a way that tests one's abilities
Example
The mountain climb was challenging but rewarding.
B1 noun /ˈsiːlɪŋ/

ceiling

Meaning
the upper interior surface of a room
Example
The ceiling of the hall was painted beautifully.
B2 verb /kənˈfɜːr/

confer

Meaning
to discuss something important or to grant or bestow something
Example
The committee will confer to decide on the new policy.
C1 noun /ˌkɒmpɪˈleɪʃən/

compilation

Meaning
a collection of things, especially pieces of writing or music, gathered together
Example
The book is a compilation of his best essays.
A2 noun /kɔːrs/

course

Meaning
a direction, path, or a set of educational lessons
Example
She enrolled in a computer science course.
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.
C1 noun ˈkɒnfluəns

confluence

Meaning
An act or process of merging.
Example
The confluence of ideas from different cultures created a rich discussion.
B2 adjective /ˈsɛntɪɡreɪd/

centigrade

Meaning
Relating to the Celsius temperature scale, where water freezes at 0° and boils at 100°.
Example
The weather forecast predicted 30 degrees centigrade.
A2 noun /ˈkændi/

candy

Meaning
a sweet food made with sugar or chocolate, often in small pieces
Example
The children were excited to get candy on Halloween.
C1 noun /ˌkɒn.əˈsɜːr/

connoisseur

Meaning
an expert judge in matters of taste, especially in food, art, or wine
Example
She is a true connoisseur of fine art.
B2 adjective /kəmˈpʌlsəri/

compulsory

Meaning
Required by law or a rule; obligatory.
Example
Wearing seat belts is compulsory in most countries.
B1 noun /keɪv/

Cave

Meaning
a large underground chamber in a hill or cliff; a hollow space in rock
Example
The explorers discovered ancient paintings on the cave walls.
C1 adjective /ˈkɒn.ɪ.fər.əs/

coniferous

Meaning
Relating to cone-bearing trees that usually have needle-like leaves and remain green year-round.
Example
Pine trees are coniferous and grow in colder climates.
A2 noun tʃɔɪs

choice

Meaning
An act of selecting or making a decision when faced with two or more possibilities.
Example
Choice enhances decision-making.
B1 adjective /ˈkɒn.stənt/

Constant

Meaning
occurring continuously over a period of time; unchanging; steady
Example
The machine runs at a constant speed.
C1 adjective /ˈkæl.əs/

Callous

Meaning
showing or having an insensitive and cruel disregard for others; emotionally hardened
Example
He showed a callous disregard for others' feelings.
C1 verb /tʃæsˈtaɪz/

chastise

Meaning
to criticize or punish severely
Example
The teacher chastised the student for being late.
A1 noun /ˈkɒf.i/

Coffee

Meaning
a hot drink made from roasted coffee beans
Example
I need a cup of coffee to start my morning.
B1 noun /kəʊst/

Coast

Meaning
the part of the land near the sea; the edge of the land
Example
We drove along the coast to enjoy the view.
C1 adjective /kəˈmɛmərətɪv/

commemorative

Meaning
Serving as a reminder or in honor of a person or event.
Example
They issued a commemorative coin for the independence anniversary.
B2 adjective ˈkʌtɪŋ ˌɛdʒ

cutting-edge

Meaning
The most advanced or innovative; at the forefront of development.
Example
This company develops cutting-edge technology.
B1 noun /ˈkær.ə.væn/

Caravan

Meaning
a group of people traveling together, especially through desert areas
Example
The merchant caravan crossed the desert with camels carrying precious goods.
C1 adjective ˈser.ɪ.brəl

cerebral

Meaning
Of the cerebrum of the brain.
Example
Cerebral functions regulate thoughts.
C1 noun /kəˈmoʊʃən/

commotion

Meaning
A state of noisy confusion or disturbance.
Example
The sudden commotion in the market drew everyone's attention.
B2 adverb /kənˈtɪnjuəsli/

Continuously

Meaning
without interruption; in an unbroken sequence
Example
The machine operates continuously for 24 hours.
B2 noun /ˈkaʊn.səl.ɪŋ/

counselling

Meaning
the process of giving professional guidance and support to help someone deal with personal, social, psychological, or career-related problems
Example
She decided to seek counselling to manage stress and anxiety.
C2 verb /kɒnˈkætəneɪt/

concatenate

Meaning
To link things together in a series or chain.
Example
The program concatenates two strings into one.
C2 adjective /ˈkʌsɪd/

cussed

Meaning
Annoyingly stubborn or difficult.
Example
He was too cussed to admit his mistake.
C1 noun /kɑːrˈtɒɡrəfi/

cartography

Meaning
The science or practice of drawing maps.
Example
She studied cartography at university to learn how to design maps.
C1 adjective /kəˈrəʊsɪv/

corrosive

Meaning
tending to cause corrosion; harmful or destructive to materials or people
Example
The chemical is highly corrosive and should be handled with care.
B2 adjective kənˈsaɪs

concise

Meaning
Brief and clearly expressed without unnecessary details.
Example
A concise speech is more impactful than a long one.
C1 noun, verb /kriːs/

crease

Meaning
a line or fold produced on paper, cloth, or other material; to make a fold or wrinkle
Example
She ironed the shirt carefully to remove every crease.
B2 noun /kənˈsɛʃən/

concession

Meaning
something that is granted, especially in response to demands; a compromise
Example
The company made several concessions during the negotiations.
C2 noun /ˈkrɛməˌtɔːri/

crematory

Meaning
a place where dead bodies are cremated
Example
The crematory was located near the cemetery.
B2 adjective /ˌkɒmplɪˈmɛntəri/

complementary

Meaning
combining in such a way as to enhance or emphasize the qualities of each other
Example
The two partners have complementary skills.
B2 noun /ˈkloʊʒər/

closure

Meaning
the action or process of closing something, or the sense of finality or resolution.
Example
The closure of the company left many employees without jobs.
C2 noun /tʃɜːrl/

churl

Meaning
A rude, boorish, or ill-mannered person.
Example
The waiter was such a churl that customers left unhappy.
A2 noun/verb /ˈsaɪkl/

cycle

Meaning
a series of events that repeat in the same order; or to ride a bicycle
Example
She cycles to school every day.
B2 noun, verb /kjuːb/

cube

Meaning
As a noun: a solid object with six equal square faces. As a verb: to cut food into small square pieces.
Example
She put a sugar cube in her tea.
B2 noun /ˌsɜː.kjʊˈleɪ.ʃən/

circulation

Meaning
The movement of blood through the body, or the movement of any fluid through a closed system.
Example
Proper circulation ensures that oxygen and nutrients reach every cell.
C2 noun /ˈtʃɜː.nɪŋ stɪk/

Churning stick

Meaning
a wooden stick used for stirring and churning butter, milk, or other liquids
Example
Grandmother used a churning stick to make fresh butter.
B1 noun /kəˈnæl/

canal

Meaning
an artificial waterway constructed for navigation, irrigation, or drainage
Example
The canal was built to help transport goods across the region.
A1 verb /kʊk/

cook

Meaning
to prepare food by heating; to make food ready to eat
Example
My mother loves to cook traditional dishes.
C1 noun /saɪˈteɪʃən/

citation

Meaning
a quotation from or reference to a book, paper, or author
Example
The research paper included a citation from Shakespeare.
B2 adjective /kɒzˈmɛt.ɪk/

cosmetic

Meaning
relating to beauty or appearance; intended to improve looks
Example
She bought a new cosmetic cream for her skin.
B1 noun /ˈkemɪst/

chemist

Meaning
a scientist who studies chemistry; a person trained to prepare and dispense medicines
Example
The chemist analyzed the sample to determine its composition.
B2 adjective /ˈkɑːmjənl/

communal

Meaning
Shared by all members of a community; for common use.
Example
The villagers worked together in the communal garden.
C1 noun /ˈkæləs/

callus

Meaning
A thickened and hardened part of the skin or soft tissue, especially in an area subjected to friction.
Example
A callus formed on his palm from using tools every day.
A2 noun /kənˈtrəʊl/

control

Meaning
The power to influence or direct people's behavior or the course of events.
Example
Proper control measures are necessary.
B2 verb /klæʃ/

clash

Meaning
to come into conflict or collision with something or someone.
Example
The two cars clashed in the intersection.
A2 adjective /kənˈfjuːzd/

confused

Meaning
unable to think clearly; uncertain or puzzled
Example
She felt confused by the complicated instructions.
C1 noun /ˈkɒndɪmənts/

condiments

Meaning
Seasonings or sauces used to add flavor to food.
Example
Ketchup and mustard are popular condiments for burgers.
A2 noun ˈtʃælɪndʒ

challenge

Meaning
A call to take part in a contest or competition, especially a demanding or stimulating one; a task or situation that tests someone's abilities.
Example
Plastic pollution poses a significant challenge to global health.
C2 verb /kəmˈpɔːrt/

comport

Meaning
to behave or conduct oneself in a particular way
Example
She comported herself with grace during the ceremony.
C2 adjective /ˈkʌvətəs/

covetous

Meaning
having or showing a strong desire for someone else's possessions
Example
She gave him a covetous look when he showed his new watch.
A1 verb /kliːn/

clean

Meaning
To make something free from dirt, marks, or mess.
Example
She cleaned the kitchen before the guests arrived.
A2 noun /ˈkɑr.pɪt/

Carpet

Meaning
a floor covering made from thick woven fabric
Example
The Persian carpet in the living room was a family heirloom.
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.
B2 noun /kənˈstɪtʃ.u.ənts/

constituents

Meaning
Components or elements used to create something.
Example
Proteins and vitamins are essential constituents of a healthy diet.
A2 adjective /ˈkʌmɪŋ/

coming

Meaning
approaching or happening soon
Example
We are preparing for the coming festival.
B1 adverb /ˈkloʊsli/

closely

Meaning
in a way that is very near in space, time, or relationship; carefully and attentively
Example
The detective examined the evidence closely.
C1 verb /tʃaɪd/

chide

Meaning
to scold or rebuke; to express disapproval
Example
The teacher chided the student for being late.
C2 noun /ˈkrɪsəndəm/

christendom

Meaning
the worldwide body or community of Christians
Example
The news spread quickly across Christendom.
B2 noun /kriːk/

creek

Meaning
a small stream or narrow river
Example
We went fishing by the creek near our house.
B1 noun /kraʊn/

Crown

Meaning
a circular ornamental headdress worn by a monarch as a symbol of authority
Example
The queen wore a magnificent crown during the coronation ceremony.
C1 verb /kənˈdəʊn/

condone

Meaning
To accept or allow behavior that is morally wrong or offensive.
Example
The manager refused to condone harassment in the workplace.
C2 noun /ˈkætəˌklɪzəm/

cataclysm

Meaning
A sudden and violent event that causes great destruction or upheaval.
Example
The earthquake was a cataclysm that reshaped the city.
C1 noun /ˈkriː.dəns/

credence

Meaning
belief in or acceptance of something as true
Example
The witness gave credence to the defendant's alibi.
B2 verb /kəˈlæps/

collapse

Meaning
to fall down or inward suddenly; to break down completely
Example
The old building collapsed after the earthquake.
C1 adjective ˈklaɪ.mət rɪˈzɪl.i.ənt

climate-resilient

Meaning
Able to cope with the adverse effects of climate change; sustainable and adaptable.
Example
Climate-resilient crops can survive extreme weather conditions.
B1 noun /ˌkɒmpəˈzɪʃən/

composition

Meaning
the act of creating a piece of writing, music, or art; the way parts are arranged
Example
Her composition won first prize in the contest.
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.
C2 noun /sɛnˈtjʊəriən/

centurion

Meaning
A commander of a unit of one hundred soldiers in the ancient Roman army.
Example
The centurion led his men into battle with courage.
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 /ˈkʌnɪŋ/

cunning

Meaning
Having or showing skill in achieving one's ends by deceit or evasion; cleverness in a tricky way.
Example
The cunning fox tricked the farmer.
C1 noun /ˌkɒnfləˈɡreɪʃən/

conflagaration

Meaning
This is a common misspelling of 'conflagration', which means a large, destructive fire.
Example
The term 'conflagaration' is often incorrectly used instead of 'conflagration'.
C2 noun /kæd/

Cad

Meaning
a man who behaves dishonorably, especially toward women
Example
Everyone at the party avoided him because he was known to be a cad.
B1 noun /ˌkænsəˈleɪʃən/

cancellation

Meaning
the act of stopping something that was planned or scheduled; the act of nullifying or invalidating something
Example
The airline announced the cancellation of several flights due to bad weather.
C1 verb /kənˈstruː/

construe

Meaning
to interpret or understand the meaning of something in a particular way
Example
His words could be construed as a threat.
C2 noun /kəmˈpɒz.ɪ.tər/

Compositor

Meaning
a person who arranges type for printing or creates musical compositions
Example
The compositor carefully arranged the text for the newspaper.
B1 verb /kəˈmænd/

command

Meaning
to give an order authoritatively; to control or direct
Example
The general commanded the soldiers to move forward.
C1 noun ˌkʌl.mɪˈneɪ.ʃən

culmination

Meaning
The highest or climactic point of something, especially as attained after a long time.
Example
The project reached its culmination after years of effort.
B1 noun /ˌkrɪstiˈænɪti/

christianity

Meaning
the religion based on the teachings of Jesus Christ
Example
Christianity has millions of followers around the world.
C2 adjective /ˌkæləˈrɪfɪk/

calorific

Meaning
Relating to the amount of energy contained in food or fuel.
Example
Chocolate is highly calorific, so it should be eaten in moderation.
C2 adjective /ˈkreɪvən/

craven

Meaning
cowardly; lacking courage
Example
He was too craven to stand up for his beliefs.
B2 noun /kəˈroʊnə/

corona

Meaning
a crown or crown-like structure; also refers to the outer atmosphere of the sun
Example
The sun's corona was visible during the total solar eclipse.
C2 noun /ˌkɔːrnjuˈkoʊpiə/

cornucopia

Meaning
an abundance or overflowing supply of something
Example
The festival offered a cornucopia of fruits and sweets.
C1 verb koʊˈɜrs

coerce

Meaning
To force someone to do something against their will using threats or intimidation.
Example
The manager tried to coerce the employees into working overtime.
B2 noun /kəˈmændər/

Commander

Meaning
a person in authority over a military unit; leader of armed forces
Example
The commander ordered his troops to advance.
B1 adjective /ˈkɒn.fɪ.dənt/

Confident

Meaning
self-assured; certain; having belief in one's abilities
Example
She felt confident about her performance in the exam.
B2 noun kəmˈpet.ɪ.tɪv.nəs

competitiveness

Meaning
The quality of being as good as or better than others of a comparable nature; the ability to compete successfully.
Example
Competitiveness is vital for economic sustainability.
C1 verb /kraʊtʃ/

crouch

Meaning
to bend your knees and lower your body close to the ground
Example
The cat crouched before leaping at its prey.
B2 adjective /kənˈsɪd.ər.ɪt/

Considerate

Meaning
showing careful thought about the feelings or wishes of others; thoughtful
Example
He is always considerate of others' feelings.
B1 verb kənˈsjuːmz

consumes

Meaning
Use up (a resource); eat, drink, or ingest (food or drink).
Example
An individual consumes around 20 kg of plastic annually.
B1 noun kəˈmɪt.mənt

commitment

Meaning
A promise or firm decision to do something; the state or quality of being dedicated to a cause or activity.
Example
The president reaffirmed his commitment to environmental protection.
C2 noun /kiˌɑːrəˈskjʊəroʊ/

chiaroscuro

Meaning
The use of strong contrasts between light and dark in art or literature to create a dramatic effect.
Example
The artist's painting used chiaroscuro to highlight the figure's face.
C1 noun /krɪpt/

crypt

Meaning
an underground chamber, especially one beneath a church, used as a burial place
Example
The tourists explored the ancient crypt beneath the cathedral.
B1 noun /ˈkɜːr.ənt/

Current

Meaning
a body of water or air moving in a definite direction; present time
Example
The river current was too strong for swimming.
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.
C2 noun /ˌkɒnfəˈriː/

conferee

Meaning
a person who takes part in a conference
Example
Each conferee received a badge at the registration desk.
B2 adjective /ˈkaʊntləs/

countless

Meaning
too many to be counted; innumerable
Example
There are countless stars in the sky.
B1 noun /sərˈtɪfɪkət/

certificate

Meaning
a document serving as proof of achievement or qualification
Example
She received a certificate for completing the course.
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.
B1 noun /klɑːrk/

clerk

Meaning
A person employed in an office or bank to keep records, accounts, and undertake other routine administrative duties.
Example
The clerk helped me find the correct form.
B2 verb /kənˈtæmɪneɪt/

contaminate

Meaning
To make something impure, dirty, or harmful by contact with a poisonous or polluting substance.
Example
The river was contaminated by industrial waste.
C1 adjective, noun /ˈkɔːrpərəl/

corporal

Meaning
relating to the body; a low-ranking officer in the military
Example
He suffered a corporal punishment for his mistake.
B2 adjective /ˈsɛl.əˌbreɪ.tɪd/

celebrated

Meaning
Widely known and praised; famous for an achievement.
Example
He is a celebrated author in the field of literature.
C1 noun ˈkɑːr.bən ˌsiː.kwəˈstreɪ.ʃən

carbon sequestration

Meaning
The process of capture and long-term storage of atmospheric carbon dioxide to mitigate or defer global warming.
Example
Forests play a key role in carbon sequestration.
C1 adjective /kəˈlæpsəbl̩/

collapsible

Meaning
able to be folded down or reduced in size
Example
She bought a collapsible chair for camping.
B2 adjective /ˈsɪn.ɪ.kəl/

cynical

Meaning
Believing that people are motivated by self-interest; distrustful of human sincerity or integrity.
Example
She was cynical about the politician's promises.
C2 noun /ˌkæl.sɪ.fɪˈkeɪ.ʃən/

calcification

Meaning
The process of calcium accumulation in soil, making it hard.
Example
Calcification reduces soil permeability and affects crop growth.
A2 adverb /ˈklɪrli/

clearly

Meaning
In a way that is easy to perceive, understand, or see.
Example
She spoke clearly so that everyone could understand.
C2 adjective /ˈkɒlərɪk/

choleric

Meaning
Easily angered; irritable and hot-tempered.
Example
His choleric nature often got him into arguments.
B2 noun /ˌklæsɪfɪˈkeɪʃən/

classification

Meaning
the action or process of classifying something into groups based on shared characteristics.
Example
The classification of animals helps in understanding their biology.
A2 noun /klɔːθ/

Cloth

Meaning
woven or felted fabric made from wool, cotton, or a similar fiber
Example
The tailor cut the cloth into precise pieces.
C1 verb /ˌkɒndɪˈsɛnd/

condescend

Meaning
to behave as if one is superior while being gracious to others
Example
He would not condescend to answer such a trivial question.
C2 noun /ˈkloʊðiər/

clothier

Meaning
a person or company that makes, sells, or deals in clothes.
Example
The town’s clothier displayed fine suits in his shop window.
C2 noun /koʊˈkɛt/

coquette

Meaning
a woman who flirts lightheartedly
Example
She was a coquette, always charming everyone at the party.
C2 verb /ˈtʃeɪ.sən/

chasten

Meaning
to correct or discipline; to humble or subdue
Example
The coach chastened the team after their poor performance.
C2 adjective /ˈkɒs.ɪ.tɪd/

cosseted

Meaning
pampered, treated with excessive care and attention
Example
The cosseted child always got what he wanted.
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.