carbon sequestration
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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 noun /ˌkɒrəˈneɪʃən/

coronation

Meaning
the act or ceremony of crowning a sovereign or monarch
Example
The coronation of the new king was attended by thousands of people.
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 adjective /kənˈstreɪnd/

constrained

Meaning
appearing forced, unnatural, or restricted
Example
He gave a constrained smile during the awkward meeting.
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.
C1 noun ˈklaɪmət ˌrɛɡjʊˈleɪʃən

climate regulation

Meaning
The moderation of climate conditions through natural or artificial processes.
Example
Forests help in climate regulation by stabilizing local temperatures.
C1 noun/adjective /klɛft/

cleft

Meaning
a split or crack; a space or opening made by cleavage
Example
The goat disappeared into a cleft in the rocks.
C1 noun kəˈmjuːnɪti ˈsɜːrvɪs aɪˈdiːəlz

community service ideals

Meaning
Principles and standards of serving the community for social good.
Example
Community service ideals must be taught in schools.
C1 noun /kliːk/

clique

Meaning
a small, exclusive group of people
Example
The students formed a clique that excluded others.
C1 verb /koʊks/

coax

Meaning
to persuade someone gently or gradually to do something
Example
She managed to coax the cat out of the tree with some food.
C1 noun /ˈsɪ.nɪk/

Cynic

Meaning
a person who believes that people are motivated purely by self-interest; someone who is skeptical about human nature
Example
The old cynic believed that politicians only cared about getting votes.
C1 noun /kəˈnʌn.drəm/

conundrum

Meaning
A complex problem or puzzle without an easy solution
Example
The ethical conundrum puzzled the researchers.
C1 adjective /kənˈsɪliətɔːri/

conciliatory

Meaning
intended to make someone less angry or more agreeable; soothing
Example
She spoke in a conciliatory tone to ease the tension.
C1 adjective /klænˈdɛstaɪn/

clandestine

Meaning
kept secret or done secretly, especially for illicit purposes
Example
They held a clandestine meeting late at night.
C1 noun /ˈkʌl.ən.dər/

Colander

Meaning
a bowl-shaped kitchen utensil with holes in it used for draining food such as pasta or rice
Example
She drained the pasta using a colander.
C1 noun /ˈkɒrənər/

coroner

Meaning
an official who investigates sudden, violent, or suspicious deaths
Example
The coroner determined the cause of death was natural.
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.
C1 noun /ˈʃɪvəlri/

chivalry

Meaning
The medieval knightly system with its moral, social, and religious code; courteous behavior, especially toward women.
Example
The knight lived by the code of chivalry.
C1 noun /ˈsɪn.ɪˌsɪz.əm/

cynicism

Meaning
An inclination to believe that people are motivated purely by self-interest; skepticism.
Example
His cynicism made it hard for him to trust anyone.
C1 noun /krʌks/

crux

Meaning
the most important or decisive point of an issue
Example
The crux of the problem lies in poor communication.
C1 adjective /ˈkjuːmjələtɪv/

cumulative

Meaning
Increasing gradually by addition; growing in quantity, force, or effect.
Example
The cumulative effect of stress can harm your health.
C1 adjective /ˈtʃɛkərd/

chequered

Meaning
Having a pattern of squares, or marked by varied and contrasting experiences or periods.
Example
He had a chequered career with both great successes and failures.
C1 noun /kənˈtentmənt/

contentment

Meaning
a state of happiness and satisfaction with what one has
Example
She felt a deep sense of contentment after helping others.
C1 adjective /ˈsiːs.ləs/

Ceaseless

Meaning
continuing without pause or interruption; endless
Example
The ceaseless rain lasted for three days.
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 kənˈsɔː.ti.əm

consortium

Meaning
An association of several companies or organizations formed to undertake an enterprise beyond the resources of any one member.
Example
The consortium worked collaboratively to build the cable.
C1 noun /ˈklæmər/

clamor

Meaning
a loud and confused noise, especially of people shouting insistently
Example
The clamor of the protesting crowd filled the square.
C1 noun /ˈkaʊərdɪs/

cowardice

Meaning
lack of courage; behavior showing fear
Example
His cowardice prevented him from speaking up.
C1 noun /ˈsɛtərə/

cetera

Meaning
Latin for 'the rest' or 'others'; commonly used in the phrase 'et cetera' meaning 'and so on'.
Example
We need to buy pens, paper, notebooks, et cetera.
C1 adjective ˌkɒn.ʃiˈen.ʃəs

conscientious

Meaning
Wishing to do what is right, especially to do one's work or duty well and thoroughly.
Example
A conscientious worker always delivers high-quality results.
C1 noun/verb kənˈdʒɛk.tʃər

conjecture

Meaning
An opinion or conclusion formed on the basis of incomplete information; to form an opinion or supposition about something.
Example
The scientist's conjecture was later proven true.
C1 noun /ˈkroʊ.bɑːr/

Crowbar

Meaning
a heavy iron bar with a curved end used as a lever for prying things apart
Example
He used a crowbar to remove the old nails.
C1 noun /ˈkæpɪˌlɛri/

capillary

Meaning
a very thin blood vessel that connects arteries and veins
Example
Oxygen passes from the blood into tissues through capillaries.
C1 noun /kɑst/

Caste

Meaning
a social class system; a hereditary class of Hindu society
Example
The ancient caste system divided society into different social groups.
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 /ˈʃoʊ.və.nɪst/

chauvinist

Meaning
A person displaying excessive or prejudiced loyalty to a group, cause, or gender.
Example
He was labeled a chauvinist after his remarks about women in the workplace.
C1 noun /kənˈtɪn.ju.əns/

continuance

Meaning
the state of continuing or being prolonged; persistence
Example
The continuance of the project depended on securing additional funding.
C1 noun /kjʊˈreɪtər/

curator

Meaning
a person who is responsible for the care and management of a museum, gallery, or collection
Example
The curator organized a new exhibition of ancient artifacts.
C1 verb /kənˈtraɪv/

contrive

Meaning
to plan or devise cleverly or skillfully
Example
She contrived a clever plan to surprise her friends.
C1 adjective /kəˈlæpsəbl̩/

collapsible

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

chaplain

Meaning
A member of the clergy attached to a private chapel, institution, hospital, or military unit.
Example
The army chaplain offered prayers before the battle.
C1 verb /ˈkrɪsən/

christen

Meaning
to give a name to someone at baptism or to name something officially
Example
They christened the ship after the queen.
C1 noun /ˌklɔːstrəˈfəʊbiə/

claustrophobia

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

consecrate

Meaning
to make something sacred, usually through a religious ceremony
Example
The church was consecrated by the bishop.
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 noun /krəˈnɒlədʒi/

chronology

Meaning
The arrangement of events or dates in the order of their occurrence.
Example
The chronology of the dynasty was carefully studied by historians.
C1 noun /ˈkaʊn.tə.nəns/

countenance

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

celibate

Meaning
abstaining from marriage and sexual relations; a person who does so
Example
He chose to remain celibate for religious reasons.
C1 adjective ˈser.ɪ.brəl

cerebral

Meaning
Of the cerebrum of the brain.
Example
Cerebral functions regulate thoughts.
C1 noun kənˈsjuː.mə.rɪ.zəm

consumerism

Meaning
The tendency to increase consumption of goods and the importance given to consuming products.
Example
Modern consumerism leads to increased demand for luxury goods.
C1 verb /kənˈstrɪkt/

constrict

Meaning
to make narrower or tighter; to shrink or compress
Example
The snake constricted its prey before swallowing.
C1 noun /ˈkɜːrfjuː/

curfew

Meaning
a rule requiring people to stay indoors after a certain time, usually at night
Example
The city imposed a curfew during the unrest.
C1 adjective ˈkrɪp.tɪk

cryptic

Meaning
Having a meaning that is mysterious or obscure; difficult to understand.
Example
The message was cryptic and hard to decipher.
C1 noun kənˈɡlɒm.ər.ət

conglomerate

Meaning
A large corporation formed by the merging of separate and diverse firms.
Example
The company grew into a multinational conglomerate.
C1 noun /kənˈsɜːvəˌtɔːri/

conservatory

Meaning
A greenhouse for growing plants or a school for music and the arts.
Example
They grew exotic plants in the conservatory.
C1 verb /kənˈspaɪər/

conspire

Meaning
to secretly plan with others to do something harmful or illegal
Example
They conspired to overthrow the government.
C1 noun /ˌkʌl də ˈsæk/

cul de sac

Meaning
A street or passage closed at one end; a dead end.
Example
They bought a house at the end of a quiet cul de sac.
C1 adjective ˌkɑːr.sɪ.nəˈdʒen.ɪk

carcinogenic

Meaning
Having the potential to cause cancer in living tissue.
Example
Processed meat contains carcinogenic compounds.
C1 noun /ˌkɒndʒʊˈɡeɪʃən/

conjugation

Meaning
the variation of the form of a verb to indicate tense, person, and number
Example
French verbs have complex conjugations.
C1 noun /ʃæˈtoʊ/

chateau

Meaning
a large French country house or castle
Example
They stayed in a beautiful chateau in France.
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.
C1 noun /ˈkɒn.vɔɪ/

convoy

Meaning
a group of vehicles or ships traveling together, often for protection
Example
The military convoy moved through the desert at dawn.
C1 noun /ˈkæzəm/

chasm

Meaning
a deep fissure in the earth's surface or a wide difference between people or ideas
Example
There was a great chasm between the two political parties.
C1 verb /ˈsenʃər/

censure

Meaning
to criticize severely; to express strong disapproval
Example
The committee censured the politician for his misconduct.
C1 noun /kʌˈstoʊ.di.ən/

Custodian

Meaning
a person who has responsibility for or looks after something; a caretaker or guardian
Example
The school custodian ensures that all buildings are clean and secure.
C1 verb /kənˈdʒɛst/

congest

Meaning
To block or overcrowd a space, making movement or flow difficult.
Example
Heavy traffic can congest the city streets during rush hour.
C1 noun /ˈkɒlərə/

cholera

Meaning
An infectious disease of the small intestine causing severe vomiting and diarrhea.
Example
The village suffered an outbreak of cholera after the flood.
C1 noun /kriːd/

creed

Meaning
A system of religious or spiritual beliefs or a guiding principle.
Example
Freedom of speech is part of his personal creed.
C1 noun kəˈlæt.ər.əl

collateral

Meaning
Something pledged as security for repayment of a loan, to be forfeited in the event of a default.
Example
The bank requires collateral for loan approval.
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.
C1 noun /ˈtʃɪz.əl/

Chisel

Meaning
a tool with a sharp flat edge used for cutting or shaping wood, stone, or metal
Example
The carpenter used a chisel to carve the wood.
C1 verb /ˈkætəˌlaɪz/

catalyze

Meaning
To cause or accelerate a reaction or change.
Example
The new law catalyzed reforms across the sector.
C1 noun /koʊˈɜː.ʃən/

coercion

Meaning
The practice of persuading someone to do something by using force or threats.
Example
Cybercriminals use coercion to extract information.
C1 noun ˌkæp.ɪ.təl.aɪˈzeɪ.ʃən

capitalization

Meaning
The total market value of a company's shares or the provision of capital for a company or activity.
Example
The company's capitalization reached $1 billion in market value.
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.
C1 noun /kənˈtɪn.dʒən.si/

contingency

Meaning
A provision for an unforeseen event or circumstance, especially in financial planning.
Example
The company has a contingency plan for economic downturns.
C1 adjective /kənˈtɪn.ju.əl/

Continual

Meaning
happening repeatedly over a long period of time; constant and uninterrupted
Example
The continual noise from the construction site was very annoying.
C1 noun /ˌkɒn.təmˈpleɪ.ʃən/

contemplation

Meaning
The action of looking thoughtfully at something for a long time; deep reflective thought.
Example
She sat in contemplation before making her decision.
C1 verb /ˈkʌvət/

covet

Meaning
to desire something belonging to someone else
Example
He coveted his neighbor's new car.
C1 noun ˌkɒn.ʃiˈen.ʃəs.nəs

conscientiousness

Meaning
The quality of wishing to do one's work or duty well and thoroughly; diligence.
Example
Her conscientiousness in work led to a well-organized project.
C1 adjective /kənˈdʒiːniəl/

congenial

Meaning
pleasant and friendly because of having similar interests or qualities
Example
They found the café a congenial place to meet and talk.
C1 noun /ˈsɪstərn/

cistern

Meaning
A tank or container for storing water, usually for household use.
Example
The old house still had a cistern to collect rainwater.
C1 noun /kəˈmɪtl̩/

committal

Meaning
The action of sending a person to prison or a mental hospital; also the act of committing something to a particular place.
Example
The judge ordered the committal of the accused to custody.
C1 noun/verb /kroʊˈʃeɪ/

crochet

Meaning
Needlework made by interlocking loops of thread with a hooked needle; the act of making such items.
Example
She learned how to crochet a scarf for winter.
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.
C1 noun /ˈkɒntrəbænd/

contraband

Meaning
goods that are illegal to import, export, or possess
Example
The police seized a shipment of contraband cigarettes.
C1 verb /ˈkɒŋɡrɪɡeɪt/

congregate

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

Common Carp

Meaning
A large freshwater fish widely cultivated for food
Example
Common carp is an important fish in aquaculture.
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.
C1 verb কনডেন্স

condense

Meaning
To change from gas to liquid form; to become denser.
Example
Water vapor condenses into raindrops.
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.
C1 adjective /kəˈnɒnɪkəl/

canonical

Meaning
Conforming to a general rule or accepted standard; officially recognized.
Example
Shakespeare’s works are considered canonical in English literature.
C1 adjective /kənˈteɪ.dʒəs/

Contagious

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

captivate

Meaning
to attract and hold the interest of; to charm or fascinate
Example
Her beautiful voice captivated the audience.
C1 noun /ˈkælɪbər/

caliber

Meaning
The quality of someone's ability or character; the internal diameter of a gun barrel.
Example
The university attracts students of high caliber.
C1 noun /ˈkæv.əl.ri/

Cavalry

Meaning
soldiers who fight on horseback; the part of an army formerly composed of troops on horseback
Example
The cavalry charged across the field with great speed.
C1 noun /ˈkoʊhɔːrt/

cohort

Meaning
A group of people with a shared characteristic, usually of the same age or with a common experience.
Example
The study tracked a cohort of students over ten years.
C1 noun koʊˈhisɪv ˈjunɪts

cohesive units

Meaning
Groups or organizations that work together as unified wholes, with members closely bound together.
Example
Early humans formed cohesive units for survival.
C1 adjective /kənˈsɛntrɪk/

concentric

Meaning
having a common center, as in circles or spheres
Example
The artist drew concentric circles on the canvas.
C1 noun, adjective /ˈsɛntənəri/ or /sɛnˈtɛnəri/

centenary

Meaning
The hundredth anniversary of a significant event; relating to a period of 100 years.
Example
The school celebrated its centenary with a grand event.
C1 noun /kənˈvʌl.ʃən/

convulsion

Meaning
a sudden, violent, involuntary contraction of muscles; a seizure
Example
The medicine helped prevent convulsions in children.
C1 noun /kənˈfɔːrməns/

conformance

Meaning
The act of conforming to a rule, standard, or law.
Example
The product was tested for conformance with safety standards.
C1 verb /kəˈmɛmɔˌreɪt/

commemorate

Meaning
To honor and remember someone or something through a ceremony or action.
Example
The statue was built to commemorate the fallen heroes.
C1 verb kəˈrɒb.ə.reɪt

corroborate

Meaning
Confirm or give support to a statement, theory, or finding.
Example
The witness corroborated the defendant's testimony.
C1 adjective ˈkɒn.təm.plə.tɪv

contemplative

Meaning
Expressing or involving prolonged thought; meditative and reflective.
Example
He spent a contemplative evening reflecting on his decisions.
C1 noun ˈkeɪ.dəns

cadence

Meaning
The rhythm and flow of speech with rise and fall in tone.
Example
His speech had a natural cadence that captivated the audience.
C1 adjective /ˈkɔː.stɪk/

caustic

Meaning
able to burn or corrode by chemical action; severely sarcastic
Example
Her caustic remarks hurt his feelings.
C1 adjective /klæd/

clad

Meaning
dressed or covered in a particular way
Example
The knight was clad in shining armor.
C1 noun /kəmˈpʌl.ʃən/

Compulsion

Meaning
the action or state of forcing or being forced to do something; an irresistible urge to behave in a certain way
Example
He felt a strong compulsion to check his phone every few minutes.
C1 noun /ˈkɔːkəs/

caucus

Meaning
A meeting of members of a political party to select candidates or decide policy.
Example
The party held a caucus to nominate their candidate for president.
C1 noun /krɪˈden.ʃəl/

credential

Meaning
a qualification, achievement, or aspect of a person's background used to indicate suitability for something
Example
She presented her credentials before starting the new job.
C1 noun ˌsɛn.trə.laɪˈzeɪ.ʃən

centralization

Meaning
The concentration of control and decision-making power in a central authority.
Example
Excessive centralization can slow down decision-making.
C1 verb /tʃæsˈtaɪz/

chastise

Meaning
to criticize or punish severely
Example
The teacher chastised the student for being late.
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.
C1 adjective /ˈkoʊvərt/

covert

Meaning
hidden, secret, or not openly acknowledged
Example
The spy conducted a covert operation behind enemy lines.
C1 noun /krʌst/

crust

Meaning
the hard outer surface of something, especially bread or the Earth's outer layer
Example
He cut off the crust of the bread before eating.
C1 adjective /ˌkævəˈlɪər/

cavalier

Meaning
showing a lack of proper concern; dismissive or offhand
Example
He had a cavalier attitude toward safety regulations.
C1 verb /kənˈsɛptʃuəlaɪz/

conceptualize

Meaning
to form an idea or concept of something in your mind
Example
The artist conceptualized a new design for the exhibition.
C1 noun /ˈkæviˌæt/

caveat

Meaning
a warning or condition to be considered before taking action
Example
The proposal was accepted with one caveat.