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C1 noun/verb /ˈsaɪ.fər/

cipher

Meaning
A secret or disguised way of writing; a code; to put a message into secret writing.
Example
Military messages are protected using a cipher.
C2 adjective /kəˈkɒfənəs/

cacophonous

Meaning
Producing a harsh, discordant mixture of sounds.
Example
The cacophonous sounds of the city kept her awake all night.
B2 noun /ˌkɒmplɪˈkeɪʃən/

complication

Meaning
A problem or difficulty that makes a situation harder to deal with.
Example
His illness led to serious complications after surgery.
B1 noun /ˈtʃɛərmən/

chairman

Meaning
the leader or head of a meeting, committee, or organization
Example
The chairman opened the meeting with a short speech.
C1 verb /ˈkrʌmpəl/

crumple

Meaning
to crush something into folds or wrinkles
Example
He crumpled the paper and threw it in the bin.
C2 verb /ˈkʌzən/

cozen

Meaning
to deceive, cheat, or trick someone
Example
He cozened the old man out of his money.
B2 noun /ˈkɒm.ɪt/

Comet

Meaning
a celestial object consisting of ice and dust that develops a tail when approaching the sun
Example
Halley's Comet appears in the sky every 76 years.
A2 noun /ˈkʌstəmər/

customer

Meaning
a person or organization that buys goods or services from a store or business
Example
The shopkeeper greeted the customer with a smile.
A2 noun/verb /kɔːz/

cause

Meaning
a person or thing that gives rise to an action, phenomenon, or condition; to make something happen
Example
The heavy rain caused flooding in the city.
C2 noun /ˈkrɪsəndəm/

christendom

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

Compassionate

Meaning
feeling or showing sympathy and concern for others who are suffering
Example
The compassionate nurse took extra time to comfort the worried patients.
B1 noun /ˈkʌˈs.təm/

Custom

Meaning
a traditional practice or behavior; duties levied on imports; habitual practice
Example
It is a local custom to remove shoes before entering someone's home.
B2 noun ˈkæp.sjuːl

capsule

Meaning
A small soluble case of gelatin containing a dose of medicine, swallowed whole.
Example
Capsules contain controlled environments.
B2 adjective kɒnˈtek.stju.əl

contextual

Meaning
Depending on or relating to the circumstances or setting; context-dependent.
Example
Contextual meaning changes depending on usage.
B1 noun/adjective /ˌkærəktəˈrɪstɪk/

characteristic

Meaning
A distinguishing quality or feature of a person, place, or thing.
Example
Kindness is a characteristic of true leadership.
B2 noun /kɒk/

Cock

Meaning
an adult male chicken
Example
The cock crowed loudly at dawn to wake everyone up.
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.
C2 verb /ˈkæstreɪt/

castrate

Meaning
To remove the testicles of a male animal or human.
Example
The farmer castrated the young bulls to make them easier to manage.
C1 adjective/noun /ˈkɜːrsɪv/

cursive

Meaning
Written with characters joined together in a flowing manner.
Example
The teacher asked students to write the essay in cursive handwriting.
A2 noun ˈkɜːrɪdʒ

courage

Meaning
The ability to do something that frightens one; bravery.
Example
Courage is essential in the face of challenges.
B2 noun /ˈkruː.əl.ti/

Cruelty

Meaning
behavior that causes pain or suffering to others; the quality of being cruel
Example
The documentary exposed the cruelty of factory farming to animals.
C2 verb /ˌsɜːrkəmˈnævɪɡeɪt/

circumnavigate

Meaning
to travel all the way around something, especially the earth
Example
Magellan was the first to circumnavigate the globe.
B2 adjective /kəʊˈɒpərətɪv/

cooperative

Meaning
willing to work or act together with others for a common purpose
Example
She was very cooperative during the interview process.
C2 adjective ˈkoʊ.dʒənt

cogent

Meaning
Clear, logical, and convincing.
Example
His cogent argument convinced the jury.
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 noun /kriːk/

creek

Meaning
a small stream or narrow river
Example
We went fishing by the creek near our house.
C1 noun /ˈsɛntrɪˌfjuːdʒ/

centrifuge

Meaning
A machine that spins substances at high speed to separate different components.
Example
The lab technician used a centrifuge to separate the blood cells from the plasma.
B1 adjective ˈkɒmplɛks

complex

Meaning
Having many interrelated parts or factors; complicated.
Example
The relationship between poverty and education is complex.
B2 adjective ˌkɒntrəˈdɪktəri

contradictory

Meaning
Mutually opposed or inconsistent; containing elements that oppose each other.
Example
Their views on education are contradictory.
C1 noun /ˈkliː.vər/

Cleaver

Meaning
a heavy knife with a broad blade used for chopping meat or vegetables
Example
The chef used a cleaver to chop the chicken bones.
A2 noun /tʃæns/

chance

Meaning
An opportunity or possibility of something happening.
Example
He took a chance and applied for the job.
B2 noun /ˌkrɛd.ɪˈbɪl.ɪ.ti/

credibility

Meaning
The quality of being trusted and believed in; trustworthiness.
Example
His credibility as a leader remains unquestioned.
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.
B2 noun /krɑk pɑt/

Crock pot

Meaning
an electric cooking pot that cooks food slowly at low temperatures
Example
I put the chicken and vegetables in the crock pot before going to work.
B2 noun /ˌkɒrəˈleɪʃən/

correlation

Meaning
a mutual relationship or connection between two or more things
Example
Researchers found a strong correlation between diet and heart disease.
C1 adjective /kənˈteɪ.dʒəs/

Contagious

Meaning
likely to spread to and affect others; infectious
Example
Her laughter is contagious and makes everyone smile.
C1 noun /ˈkriː.dəns/

credence

Meaning
belief in or acceptance of something as true
Example
The witness gave credence to the defendant's alibi.
C2 adjective /ˈtʃɛəri/

chary

Meaning
cautious or wary about doing something
Example
She was chary of investing in the new business venture.
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.
C1 noun /ˈkaʊn.tə.nəns/

countenance

Meaning
a person's face or expression; support or approval
Example
Her cheerful countenance brightened the room.
C1 noun/verb /kruːˈseɪd/

crusade

Meaning
a vigorous campaign for a social, political, or religious cause; to fight passionately for a cause
Example
She has been crusading for women's rights all her life.
B2 noun /kəmˈplɛksɪti/

complexity

Meaning
The state of being complex; intricacy.
Example
The complexity of the problem required a team of experts.
B2 noun /kənˈsɪstənsi/

consistency

Meaning
The quality of always behaving or performing in a similar way; uniformity.
Example
Consistency in quality is key to customer satisfaction.
A2 adjective /kənˈfjuːzd/

confused

Meaning
unable to think clearly; uncertain or puzzled
Example
She felt confused by the complicated instructions.
B1 noun /ˌsɪvɪlaɪˈzeɪʃən/

civilization

Meaning
the stage of human social and cultural development and organization considered most advanced
Example
Ancient Egypt is known for its remarkable civilization.
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.
B2 noun/verb /ˈtʃɑːrtər/

charter

Meaning
a written document granting rights or privileges; to hire a vehicle or vessel for temporary use
Example
The company decided to charter a bus for the trip.
A1 noun /ker/

Care

Meaning
the provision of what is necessary for health, welfare, or protection
Example
The nurse provided excellent care for the elderly patients.
B1 noun /kəmˈpəʊzə(r)/

composer

Meaning
a person who writes music, especially classical music
Example
The composer is working on a new symphony.
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.
B2 noun ˈkɔːʃən

caution

Meaning
Care taken to avoid danger or mistakes; a warning or piece of advice.
Example
Researchers issued a caution regarding unsustainable fishing.
B2 adjective /ˌkrɒnəˈlɒdʒɪkəl/

chronological

Meaning
Arranged in the order in which events happened.
Example
The events were listed in chronological order.
C2 adjective /ˈkɔːpjʊlənt/

corpulent

Meaning
fat or obese; having a large bulky body
Example
The corpulent man struggled to fit into the small chair.
C1 adjective /ˈkɑːr.di.æk/

cardiac

Meaning
Relating to the heart.
Example
The patient was admitted with a cardiac condition.
A2 verb tʃeɪs

chase

Meaning
To pursue in order to catch or overtake; to follow rapidly or eagerly
Example
Don't chase two rabbits at once.
B1 noun /kriˈeɪ.ʃənz/

creations

Meaning
Things that have been created, especially works of art or imaginative works.
Example
His creations astonished the world.
A2 adverb /kəmˈpliːtli/

completely

Meaning
totally; in every way possible
Example
The room was completely silent.
C1 noun /krʌˈsteɪʃən/

crustacean

Meaning
an aquatic animal with a hard shell, such as crabs, lobsters, and shrimps
Example
Crabs and lobsters are well-known crustaceans.
C2 noun /kənˈtjuː.ʒən/

contusion

Meaning
a bruise or injury without breaking the skin
Example
The boxer had several contusions after the match.
C2 adjective /ˌkrɪp.təˈɡræf.ɪk/

cryptographic

Meaning
Relating to cryptography; involving or using secret codes or ciphers for security.
Example
Banks use cryptographic technology to protect transactions.
B1 noun ˈkeɪ.bəl

cable

Meaning
A thick rope of wire or nonmetallic fiber, typically used for construction, mooring ships, or transmitting electricity or telecommunication signals.
Example
The cable connects countries across continents.
C2 noun /ˈkɒntrətɑː̃/

contretemps

Meaning
an unexpected and unfortunate event or disagreement; a minor dispute
Example
There was a small contretemps between the two colleagues during the meeting.
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 noun /ˈkrɛməˌtɔːri/

crematory

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

clothe

Meaning
to put clothes on; to dress; to provide with clothing
Example
She clothed the baby in warm garments.
C2 adjective /ˌkɒnsæŋˈɡwɪniəs/

consanguineous

Meaning
Related by blood; descended from the same ancestor.
Example
The study focused on genetic disorders in consanguineous families.
C1 adjective /kənˈstreɪnd/

constrained

Meaning
appearing forced, unnatural, or restricted
Example
He gave a constrained smile during the awkward meeting.
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 noun /ˌkælɪsˈθɛnɪks/

calisthenics

Meaning
exercises that use body weight for strength and flexibility
Example
She practices calisthenics every morning in the park.
C1 noun /ˈtʃʌk.əl/

Chuckle

Meaning
a quiet or suppressed laugh; to laugh quietly or with amusement
Example
He gave a soft chuckle when he heard the funny joke.
C1 adjective /kɑːrˈnɪv.ər.əs/

Carnivorous

Meaning
feeding on other animals; meat-eating
Example
Lions are carnivorous animals that hunt other animals for food.
C1 noun /ˌkɒŋɡrɪˈɡeɪʃən/

congregation

Meaning
a group of people assembled for religious worship or a common purpose
Example
The congregation gathered to hear the sermon.
B2 noun /ˈklɒzɪt/

closet

Meaning
a small room or enclosed space used for storing clothes or other things
Example
She keeps her winter coats in the closet near the door.
C1 adjective /ˌkɒnsɪˈkwɛnʃəl/

consequential

Meaning
Having important or significant consequences; resulting from something.
Example
The meeting was consequential for the future of the project.
C1 verb /ˈkʌn.dʒər/

conjure

Meaning
to summon something as if by magic; to imagine vividly
Example
The magician conjured a rabbit out of the hat.
C2 noun/adjective /ˈsaɪklɔɪd/

cycloid

Meaning
a curve traced by a point on the rim of a circle as it rolls along a straight line
Example
The cycloid is often studied in mathematics and physics.
B1 adjective /ˈtʃaɪl.dɪʃ/

Childish

Meaning
immature and silly; behaving in a way that is typical of a child but inappropriate for an adult
Example
His childish behavior during the meeting was quite embarrassing.
B2 preposition /kənˈsɜːnɪŋ/

concerning

Meaning
about or relating to something; causing worry or anxiety
Example
There are some reports concerning the new project.
A2 adjective /ˈkraʊdɪd/

crowded

Meaning
filled with too many people or things
Example
The bus was so crowded that I could hardly move.
B2 noun /ˈkɒmpoʊst/

compost

Meaning
decayed organic matter used as fertilizer
Example
The gardener added compost to enrich the soil.
B2 noun /ˈkɒmpɪtəns/

competence

Meaning
the ability to do something successfully or efficiently
Example
Her competence as a manager impressed the board.
C1 adjective /kəmˈpensətɔːri/

compensatory

Meaning
serving to make up for a loss, damage, or injury
Example
The court awarded him compensatory damages.
B2 noun /ˈkreɪvɪŋ/

craving

Meaning
a strong desire for something
Example
She has a craving for chocolate every evening.
A2 noun /tʃɜːrtʃ/

church

Meaning
a building used for public Christian worship
Example
The old church in the village was built in the 18th century.
A2 verb /kəˈlɛkt/

collect

Meaning
to gather together; to accumulate items
Example
I collect stamps as a hobby.
B1 adjective /ˈklæsɪkəl/

classical

Meaning
relating to ancient Greek or Roman culture, or representing traditional excellence in art, music, or literature
Example
She loves listening to classical music while studying.
C1 adjective ˈkʌm.bə.səm

cumbersome

Meaning
Heavy, unwieldy, difficult to handle or carry.
Example
The cumbersome luggage slowed him down.
C2 verb /kɒnˈkætəneɪt/

concatenate

Meaning
To link things together in a series or chain.
Example
The program concatenates two strings into one.
C2 noun /ˈkæl.əm.ni/

Calumny

Meaning
the making of false and defamatory statements about someone in order to damage their reputation
Example
The politician sued the newspaper for spreading calumny about his personal life.
C2 noun /ˈsɛntɔːr/

centaur

Meaning
A mythological creature with the upper body of a human and the lower body of a horse.
Example
The centaur is a well-known figure in Greek mythology.
C2 adjective /sɛnˈtrɪfjʊɡəl/

centrifugal

Meaning
Moving or tending to move away from a center.
Example
The centrifugal force pushes the clothes to the sides of the washing machine.
C2 noun /kəˌrɒbəˈreɪʃən/

corroboration

Meaning
evidence that confirms or supports a statement, theory, or finding
Example
The documents provided strong corroboration of her claims.
C1 verb /kəˈleɪt/

collate

Meaning
to collect, arrange, and combine in order
Example
The secretary collated the reports before the meeting.
C2 noun /ˈsɪɡnət/

cygnet

Meaning
a young swan
Example
The cygnet swam closely behind its mother.
A2 noun /kənˌɡrætʃ.əˈleɪ.ʃənz/

Congratulations

Meaning
words expressing praise for an achievement or good wishes on a special occasion
Example
Congratulations on your promotion! You really deserved this success.
B2 verb /ˌkɒn.trəˈdɪkt/

contradict

Meaning
to say or show the opposite of something that has been said or believed
Example
His actions contradict his words.
C2 noun ˌkɒmpjʊˈteɪʃənəl kəˌmjuːnɪˈkeɪʃən

computational communication

Meaning
Digital exchange and automated interaction; the use of computational methods and systems to facilitate communication and information sharing.
Example
Computational communication is reshaping how we share information.
C1 noun /kənˈveɪəns/

conveyance

Meaning
The action or process of transporting or carrying someone or something from one place to another.
Example
The conveyance of goods was delayed due to bad weather.
C1 noun /kuː/

coup

Meaning
a sudden, decisive action that brings about a change, especially in government
Example
The military staged a coup to overthrow the existing regime.
C1 adjective + noun kəˈmendəbəl ɪˈnɪʃətɪvz

commendable initiatives

Meaning
Praiseworthy efforts or actions that deserve admiration and approval.
Example
The commendable initiatives aim to raise awareness.
C1 noun /ˌklɔːstrəˈfəʊbiə/

claustrophobia

Meaning
an extreme or irrational fear of being in confined spaces
Example
He avoids elevators because of his claustrophobia.
B2 noun /ˈsɪnəmən/

Cinnamon

Meaning
aromatic spice obtained from the inner bark of several tree species
Example
Cinnamon is often used in baking and desserts.
A2 noun /kæp/

Cap

Meaning
a head covering with a visor; a protective covering
Example
He wore a baseball cap to protect himself from the sun.
A1 noun /kæt/

Cat

Meaning
a small domesticated carnivorous mammal with soft fur, a short snout, and retractile claws
Example
The cat sat on the windowsill watching birds.
B2 verb, noun /kəˈmjuːt/

commute

Meaning
Verb: to travel regularly between home and work; Noun: the journey to and from work.
Example
He commutes two hours every day to reach his office.
B1 noun /ˈtʃɛərˌwʊmən/

chairwoman

Meaning
a woman who presides over a meeting, committee, or organization; a female leader of a board or council
Example
She was elected chairwoman of the company after years of experience.
B1 adjective /ˈkæʒ.u.əl/

Casual

Meaning
relaxed and unconcerned; happening by chance; informal
Example
He wore casual clothes to the party.
A1 noun /klɑːs/

class

Meaning
a group of students taught together or a category of people or things with shared characteristics
Example
Our class meets every morning at nine.
C1 adjective /kənˈdʒenɪtl/

congenital

Meaning
existing from birth, usually describing a disease or condition
Example
The child was born with a congenital heart defect.
A2 noun /ˈkɔːrnər/

corner

Meaning
the place where two edges or sides meet
Example
The store is just around the corner.
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.
A2 noun ˈsen.tərz

centers

Meaning
The middle point of a circle or sphere, equidistant from every point on the circumference or surface; a place or group of buildings where a specified activity is concentrated.
Example
Centers drive regional development.
B2 noun /ˌkɑn.frənˈteɪ.ʃən/

Confrontation

Meaning
a hostile or argumentative meeting or situation between opposing parties; direct challenge or opposition
Example
The confrontation between the two leaders ended without any agreement.
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 /klɪk/

click

Meaning
to press a button on a computer mouse or similar device
Example
She clicked the link to open the website.
B2 verb /kənˈfes/

confess

Meaning
to admit guilt or wrongdoing; to acknowledge
Example
He confessed his mistake to his teacher.
A2 noun, verb /kɒf/

cough

Meaning
a sudden noisy release of air from the lungs to clear the throat or airway; to expel air suddenly from the lungs with a cough
Example
He has a bad cough and stayed home today.
A2 adjective /ˈkeər.ləs/

Careless

Meaning
not giving sufficient attention or thought to avoiding harm or errors; negligent; inattentive
Example
His careless driving caused a serious accident on the highway.
B1 noun /ˈkɒstjuːm/

costume

Meaning
a set of clothes worn to represent a particular character, culture, or occasion
Example
She wore a beautiful costume for the Halloween party.
C1 noun/verb /ˈkætəpʌlt/

catapult

Meaning
A device for launching objects at high speed; to hurl or launch something suddenly.
Example
The invention catapulted him to international fame.