calibration
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C1 noun ˌkæl.ɪˈbreɪ.ʃən

calibration

Meaning
The action or process of adjusting or determining the accuracy of measuring instruments.
Example
The accuracy of a scale depends on regular calibration.
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.
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.
C2 noun /ˌser.əˈbreɪ.ʃən/

cerebration

Meaning
the process of thinking or using the brain actively
Example
The lecture sparked intense cerebration among the students.
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.
C1 adjective /ˈkoʊvərt/

covert

Meaning
hidden, secret, or not openly acknowledged
Example
The spy conducted a covert operation behind enemy lines.
B2 noun ˌkætəˈstrɒfɪk ɪˈvents

catastrophic events

Meaning
Extremely destructive or damaging events that cause widespread devastation.
Example
Cyclones are catastrophic events in Bangladesh.
B2 noun /ˈtʃɪk piː/

Chick pea

Meaning
round beige legume; protein-rich pulse used in various dishes
Example
Soak the chick peas overnight before cooking them for better digestion.
B1 noun, verb /ˈkrɛdɪt/

credit

Meaning
As a noun: the ability to obtain goods or services before payment; recognition for an achievement. As a verb: to publicly acknowledge someone's contribution.
Example
She received credit for her contribution to the project.
B2 adjective /ˈklæsɪfaɪd/

classified

Meaning
arranged into categories; officially secret or restricted
Example
The report contains classified information and cannot be shared publicly.
A1 noun /kloʊðz/

clothes

Meaning
garments worn on the body
Example
She bought new clothes for the party.
C2 noun /kɒnˌtek.stʃu.ə.laɪˈzeɪ.ʃən/

contextualization

Meaning
The process of placing something in its proper context or setting to understand it better.
Example
Contextualization of historical events helps students understand them better.
C2 adjective /ˌkɒnsæŋˈɡwɪniəs/

consanguineous

Meaning
Related by blood; descended from the same ancestor.
Example
The study focused on genetic disorders in consanguineous families.
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.
B1 verb /kæst/

cast

Meaning
to throw; to choose actors for a play; to shape metal
Example
The fisherman casts his line into the water.
C2 noun /ˈkjʊriˌoʊ/

curio

Meaning
a small unusual or interesting object, often collected for its rarity
Example
She bought a curio from the antique shop.
B2 verb /siːs/

cease

Meaning
to bring or come to an end; to stop doing something
Example
The noise ceased as soon as the children went inside.
C1 noun /ˈkænən/

canon

Meaning
A general law, rule, principle, or collection of sacred books accepted as genuine.
Example
The book is now considered part of the literary canon.
B1 noun /ˈklaɪənt/

client

Meaning
A person or organization using the services of a professional or company.
Example
The lawyer met with her client to discuss the case.
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.
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 adjective /kənˈvɪviəl/

convivial

Meaning
friendly, lively, and enjoyable; sociable
Example
The party had a convivial atmosphere with music and laughter.
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.
C2 verb /ˈkælvɪnaɪz/

calvinize

Meaning
to imbue with the principles or doctrines of Calvinism
Example
The preacher sought to calvinize the community with strict teachings.
C2 verb /kənˈdʒɔɪn/

conjoin

Meaning
to join together or unite; to combine
Example
The two rivers conjoin just before reaching the sea.
B1 noun /ˈkɔːrɪdɔːr/

corridor

Meaning
a long passage in a building from which doors lead into rooms
Example
The students waited quietly in the corridor.
B2 noun /ˈkæʒ.u.əl.ti/

Casualty

Meaning
a person killed or injured in a war or accident; a victim of circumstances
Example
The hospital treated many casualties from the car accident.
B1 noun /ˌkæl.kjəˈleɪ.ʃən/

Calculation

Meaning
a mathematical determination of the size or number of something
Example
His calculation of the total cost was accurate to the penny.
B2 adjective /ˈkɔːstli/

costly

Meaning
expensive or causing a lot of money, time, or effort
Example
Their mistake proved to be very costly for the company.
B2 adjective /ˈkæθəlɪk/

catholic

Meaning
Including a wide variety; all-embracing; relating to the Roman Catholic Church.
Example
She has catholic tastes in music, enjoying everything from jazz to opera.
B2 verb /ˈkɒnstɪtjuːt/

constitute

Meaning
To make up, form, or establish something.
Example
These documents constitute the legal agreement between the two parties.
C2 noun /ˈkɒn.tjʊ.mə.si/

contumacy

Meaning
stubborn refusal to obey authority
Example
His contumacy led to his suspension from the council.
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.
C2 noun /ˈkɔːfər/

coffer

Meaning
A strongbox or small chest for holding valuables, often used metaphorically for funds or financial reserves.
Example
The city's coffers were drained after the costly project.
C1 noun /kəmˈpəʊ.ʒər/

composure

Meaning
The state or feeling of being calm and in control of oneself.
Example
She maintained her composure during the interview.
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.
C2 noun /kɒŋk/

Conch

Meaning
a large sea shell that can be used as a horn; the marine mollusk that lives in such a shell
Example
The fisherman blew the conch shell to signal the end of the day.
B2 adjective /kənˈtɛntɪd/

contented

Meaning
Feeling or expressing happiness and satisfaction.
Example
She was contented with her simple life.
A1 verb /tʃuːz/

choose

Meaning
to pick or select from several options
Example
I always choose healthy food options.
B2 noun /kɜːrl/

Curl

Meaning
a piece of hair that curves or coils; something with a spiral or curved shape
Example
She had beautiful natural curls that framed her face perfectly.
C2 noun /kwɑːˈfjʊr/

coiffure

Meaning
A person's hairstyle, typically an elaborate one.
Example
Her elegant coiffure impressed everyone at the party.
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.
B2 adjective /kəmˈpoʊzd/

composed

Meaning
calm and in control of oneself; made up of or formed from
Example
He remained composed even under pressure.
B2 verb /ˈkɒmbæt/

combat

Meaning
to fight against something, especially to reduce or stop it
Example
The government is taking steps to combat corruption.
C2 noun /kənˈsaɪnər/

consignor

Meaning
a person or company that sends goods to be sold or transported
Example
The consignor shipped the goods to the warehouse.
C2 verb /kənˈtjuːz/

contuse

Meaning
to bruise by striking or hitting
Example
He contused his arm when he fell off the bike.
B1 noun /kəˈrɛkʃən/

correction

Meaning
the action or process of correcting something
Example
The teacher made a correction to the student's essay.
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 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.
C2 noun /kəˈraʊzl/

carousal

Meaning
A noisy or lively drinking party or festivity.
Example
They were exhausted after a night of wild carousal.
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 /ˈkʌsɪd/

cussed

Meaning
Annoyingly stubborn or difficult.
Example
He was too cussed to admit his mistake.
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.
C2 noun /kəˈtæb.ə.lɪ.zəm/

catabolism

Meaning
The breakdown of complex molecules in living organisms to form simpler ones together with the release of energy; destructive metabolism.
Example
Catabolism plays a crucial role in cellular energy production.
C2 noun /ˈkeɪsiːn/

Casein

Meaning
the main protein found in milk and cheese, used in food production and supplements
Example
Casein protein powder is popular among athletes for muscle recovery.
B1 noun /ˈklaɪ.mət/

climate

Meaning
The weather conditions prevailing in an area in general.
Example
Climate change impacts all regions globally.
B2 noun /klɔː/

Claw

Meaning
sharp curved nail on the foot of an animal or bird
Example
The cat extended its sharp claws to climb the tree.
C2 verb /ˌkɒntrəˈvɜːrt/

controvert

Meaning
to dispute or argue against; to contradict
Example
The scientist controversed the previous research findings.
C2 noun /ˈsɜːrklət/

circlet

Meaning
A small circular band, typically worn as an ornament on the head.
Example
The princess wore a golden circlet on her forehead.
B2 noun; verb /ˈkætəlɒɡ/

catalogue

Meaning
a complete list of items, typically one in alphabetical or systematic order; to make a systematic list of items
Example
The library decided to catalogue all new books digitally.
B1 adjective /kənˈvɪnst/

convinced

Meaning
completely certain or sure about something
Example
She was convinced that he was telling the truth.
A1 verb /kliːn/

clean

Meaning
To make something free from dirt, marks, or mess.
Example
She cleaned the kitchen before the guests arrived.
B2 adjective /ˈkræŋki/

cranky

Meaning
bad-tempered, easily annoyed, or irritable
Example
The child gets cranky when he is hungry.
B1 noun ˈkæn.dɪ.deɪts

candidates

Meaning
A person who applies for a job or is nominated for election; someone being considered for a position.
Example
Candidates undergo a rigorous selection process.
C2 noun /kəˈbɑl/

Cabal

Meaning
a secret political clique or faction
Example
The journalists exposed a cabal of corrupt politicians working together.
C1 adjective /kənˈstreɪnd/

constrained

Meaning
appearing forced, unnatural, or restricted
Example
He gave a constrained smile during the awkward meeting.
C1 noun /kæpˈtɪv.ɪ.ti/

Captivity

Meaning
the condition of being imprisoned or confined
Example
After years of captivity, the prisoner was finally released.
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.
C2 noun /kənˈtraɪ.vəns/

contrivance

Meaning
a device or plan that is cleverly or artificially created
Example
The clock was an intricate contrivance of gears and springs.
C2 noun /ˈkɒnsəvəˌtwɑː/

conservatoire

Meaning
A school specializing in the study of music or drama.
Example
She trained as a pianist at the Paris Conservatoire.
B1 noun /ˌkɒmbɪˈneɪʃən/

combination

Meaning
The act of joining or mixing two or more things together.
Example
This dish is a perfect combination of sweet and spicy flavors.
C1 adjective /ˈkrɪm.zən/

Crimson

Meaning
a deep purplish-red color
Example
The crimson sunset painted the sky with beautiful shades.
C1 noun kənˌsɒl.ɪˈdeɪ.ʃən

Consolidation

Meaning
The process of converting newly learned information into long-term memory
Example
Sleep plays a key role in memory consolidation.
C2 noun /ʃəˈɡrɪn/

chagrin

Meaning
Distress or embarrassment at having failed or been humiliated.
Example
She left the room in chagrin after forgetting her lines.
B2 verb /kənˈfes/

confess

Meaning
to admit guilt or wrongdoing; to acknowledge
Example
He confessed his mistake to his teacher.
C1 verb /kliːv/

cleave

Meaning
to split or divide; to cut through forcefully
Example
He used an axe to cleave the wood.
C2 noun /ˌkɒnvəˈluːʃən/

convolution

Meaning
a twist, coil, or a complex and intricate shape or arrangement
Example
The brain has many convolutions that increase its surface area.
B1 verb, noun /klɪp/

clip

Meaning
to cut or trim something; a short extract from a film, broadcast, or recording
Example
She clipped the coupon from the newspaper.
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.
B2 noun /ˈkɒmɜːs/

commerce

Meaning
the activity of buying and selling goods and services
Example
International commerce has expanded significantly in recent years.
A2 verb /tʃɪər/

cheer

Meaning
to shout in encouragement or support; to make someone feel happier
Example
The fans cheered loudly when their team scored a goal.
C2 adjective /tʃeɪst/

Chaste

Meaning
pure and morally good; abstaining from sexual activity
Example
She lived a chaste and virtuous life.
B2 adjective /ˌkrɒnəˈlɒdʒɪkəl/

chronological

Meaning
Arranged in the order in which events happened.
Example
The events were listed in chronological order.
B2 adverb /kənˈsɪstəntli/

consistently

Meaning
in a way that does not vary; regularly and dependably
Example
She has been performing consistently well in her studies.
B2 verb /ˌkɒmprɪˈhɛnd/

comprehend

Meaning
to understand or grasp the meaning of something
Example
It is difficult to comprehend the scale of the disaster.
A1 noun /kæn/

Can

Meaning
a metal container for food or drink
Example
I opened a can of soup for lunch.
C1 verb /ˈkɒnsɪkreɪt/

consecrate

Meaning
to make something sacred, usually through a religious ceremony
Example
The church was consecrated by the bishop.
C2 noun /ˈkæbəˌlɪzəm/

cabalism

Meaning
The doctrines, practices, or secretive dealings of a cabal.
Example
The historian wrote extensively about cabalism in the royal court.
C1 noun /kɔːrs flaʊər/

Course flour

Meaning
coarsely ground flour with larger particles, typically used for baking bread
Example
She used course flour to make homemade bread with a rustic texture.
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.
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.
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.
A2 adjective /kənˈfjuːzd/

confused

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

Cobbler

Meaning
a person who repairs shoes and other leather goods
Example
The cobbler fixed my broken shoes perfectly.
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.
B2 noun /kɔːrps/

corpse

Meaning
a dead body, especially of a human
Example
The police discovered a corpse in the abandoned house.
B2 noun /ˈkʌs.tə.mər rɪˈten.ʃən/

Customer Retention

Meaning
The ability of a company or product to retain its customers over some specified period.
Example
High customer retention increases business sustainability.
C2 verb /ʧeɪf/

chafe

Meaning
To make or become sore by rubbing; to feel irritation or impatience.
Example
The tight shoes began to chafe his heels.
C1 adjective /ˈkɔː.zəl/

causal

Meaning
relating to or acting as a cause
Example
There is a causal link between smoking and cancer.
A2 verb /kəmˈper/

compare

Meaning
to examine similarities and differences between things
Example
I will compare these two products before buying.
B2 verb /kəmˈpraɪz/

comprise

Meaning
To consist of or be made up of something.
Example
The committee comprises five members.
A2 noun ˈkæm.pɪŋ

camping

Meaning
Living outdoors temporarily, especially for recreation; staying in a tent or similar shelter.
Example
Many families go camping during holidays.
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 noun /ˌklɔːstrəˈfəʊbiə/

claustrophobia

Meaning
an extreme or irrational fear of being in confined spaces
Example
He avoids elevators because of his claustrophobia.
C1 adjective /ˌkaʊntərɪnˈtuːɪtɪv/

counterintuitive

Meaning
contrary to what one would intuitively expect
Example
His approach seems counterintuitive but it actually works.
C1 adverb /ˈkrɒswaɪz/

Crosswise

Meaning
in the form of a cross; diagonally across
Example
Place the logs crosswise to build a stable fire.
C2 verb /kənˈtɛm/

contemn

Meaning
to treat or regard with disdain, scorn, or contempt
Example
He would never contemn honest work, no matter how humble.
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.
B2 verb /ˈkɒmprəmaɪz/

compromise

Meaning
To expose or make vulnerable to danger, suspicion, or disrepute.
Example
Excessive sharing can compromise your privacy.
C1 adjective /kəmˈplaɪənt/

compliant

Meaning
Willing to agree with or follow rules, requests, or demands.
Example
She was compliant with all the safety requirements.
B1 noun ˈkɒn.sɪ.kwəns

consequence

Meaning
A result or effect of an action or condition.
Example
Every action has a consequence.
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.
C2 verb /ˈkæstɪˌɡeɪt/

castigate

Meaning
To criticize someone severely or to punish harshly.
Example
The teacher castigated the students for their poor behavior.
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.
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.
B2 noun /kənˈvɪk.ʃən/

conviction

Meaning
A firmly held belief or opinion.
Example
She spoke with conviction, making everyone believe her.
B1 noun /ˈsɪtɪzən/

citizen

Meaning
a legally recognized subject or national of a state
Example
Every citizen has the right to vote.
A2 noun /ˈtʃer.i/

Cherry

Meaning
a small round red or black fruit with a hard seed inside
Example
She picked fresh cherries from the tree in her garden.
B2 adjective /ˈkɒm.pɪ.tənt/

Competent

Meaning
having the necessary skill or knowledge to do something successfully; capable
Example
She is a competent manager who handles all tasks efficiently.
C1 noun /koʊˈhɪr.əns/

coherence

Meaning
The quality of being logical and consistent; forming a unified whole.
Example
The essay lacked coherence, making it hard to follow.
A2 noun ˈkɜːrɪdʒ

courage

Meaning
The ability to do something that frightens one; bravery.
Example
Courage is essential in the face of challenges.