corrode
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C1 verb /kəˈrəʊd/

corrode

Meaning
to gradually destroy or wear away metal or other materials through chemical action
Example
The iron pipes corroded over time due to exposure to water.
C1 adjective /kənˈstreɪnd/

constrained

Meaning
appearing forced, unnatural, or restricted
Example
He gave a constrained smile during the awkward meeting.
B2 noun /kənˈtɛmpt/

contempt

Meaning
a strong feeling of dislike and lack of respect towards someone or something
Example
He spoke with contempt about the corrupt officials.
B1 adjective /kənˈviː.ni.ənt/

Convenient

Meaning
fitting in well with a person's needs, activities, and plans; suitable and practical
Example
The new shopping mall is very convenient for our family.
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 /ˈkɒtɪdʒ/

cottage

Meaning
a small simple house, typically in the countryside
Example
They spent their vacation in a cozy cottage by the lake.
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.
A2 noun /ˈkælɪndər/

calendar

Meaning
a system for organizing days, months, and years; a chart showing days of the year
Example
She marked her birthday on the calendar.
C1 noun /ˈkɑːrtɪlɪdʒ/

cartilage

Meaning
A firm, flexible connective tissue found in various parts of the body such as joints, ear, and nose.
Example
The doctor explained that the injury damaged the cartilage in his knee.
B2 adjective /ˈkrɒnɪk/

chronic

Meaning
Lasting for a long time or constantly recurring, often describing illness.
Example
She suffers from chronic back pain.
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.
A2 noun /ˈklæsˌruːm/

classroom

Meaning
A room in which classes are held in a school or college.
Example
The teacher entered the classroom and greeted the students.
C2 noun /ˈkæθoʊd/

cathode

Meaning
The negative electrode in a device such as a battery or tube, where electrons enter.
Example
The cathode emits electrons in the tube.
B1 adjective /ˈkɒmplɪˌkeɪtɪd/

complicated

Meaning
consisting of many interconnected parts; difficult to understand
Example
The instructions for the machine are too complicated to follow.
C2 adjective /ˈkɒnfluənt/

confluent

Meaning
Flowing together or merging; coming together at one point.
Example
The confluent streams formed a mighty river.
B2 noun /ˈkæbɪnət/

Cabinet

Meaning
a piece of furniture with doors and shelves used for storage
Example
The kitchen cabinet is full of dishes and utensils.
C1 noun /ˈkɒrənər/

coroner

Meaning
an official who investigates sudden, violent, or suspicious deaths
Example
The coroner determined the cause of death was natural.
C2 noun /kɒzˈmɒɡ.rə.fi/

cosmography

Meaning
the science or art of mapping the universe or cosmos
Example
Medieval scholars practiced cosmography to chart the stars and planets.
C2 noun /ˈkɔː.seər/

corsair

Meaning
a pirate, especially one operating along the Mediterranean coasts
Example
The corsair plundered ships along the coast.
C2 noun /ˈsɛʃən/

cession

Meaning
The formal giving up of rights, property, or territory, especially by a state.
Example
The treaty resulted in the cession of land to the neighboring country.
B1 noun /kræb/

Crab

Meaning
a crustacean with a broad carapace, stalked eyes, and five pairs of legs, the first pair of which are modified as pincers
Example
The crab scuttled sideways across the sand.
C2 verb /kənˈtɔːrt/

contort

Meaning
to twist or bend out of the normal shape
Example
She contorted her face in pain after the injury.
C1 verb /kənˈfleɪt/

conflate

Meaning
To combine two or more things, often confusingly, into one.
Example
The article tends to conflate facts with opinions.
C1 noun /ˈkætərækt/

cataract

Meaning
A medical condition causing clouding of the eye's lens; also a large waterfall.
Example
The old man suffered from cataracts in both eyes.
B2 adjective ˈkɒɡnɪtɪv

cognitive

Meaning
Related to mental processes of perception, memory, judgment, and reasoning.
Example
Cognitive functions improve with practice and learning.
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.
B1 adverb /ˈtʃɪəfəli/

cheerfully

Meaning
in a happy and positive manner; with visible good spirits
Example
She greeted everyone cheerfully despite the long day.
B1 noun /ˈkætl/

cattle

Meaning
large domesticated animals such as cows and bulls that are kept on a farm for their milk, meat, or hides
Example
The farmer owns a herd of cattle that graze near the river.
B2 verb kəˈlaɪd

collide

Meaning
Hit with force when moving; come into conflict or opposition.
Example
The two cars collided at the intersection.
C1 noun /ˈkɒndɪmənts/

condiments

Meaning
Seasonings or sauces used to add flavor to food.
Example
Ketchup and mustard are popular condiments for burgers.
C1 noun /kənˈspɪrə.tər/

conspirator

Meaning
a person who secretly plans with others to do something unlawful or harmful
Example
The conspirator was arrested before the plan could be carried out.
A1 adjective /kloʊzd/

closed

Meaning
not open; shut
Example
The store is closed on Fridays.
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.
A1 modal verb /kʊd/

could

Meaning
Used to indicate possibility, ability, or permission in the past or as a polite suggestion.
Example
He could swim when he was a child.
C2 noun /krəˈnɒmɪtər/

chronometer

Meaning
An instrument for measuring time precisely, especially used in navigation.
Example
The sailor relied on the chronometer to determine his position at sea.
B2 adjective + noun kriˈeɪtɪv ɪɡˈzɪbɪts

creative exhibits

Meaning
Artistic displays or presentations that show originality and imagination.
Example
The creative exhibits highlighted recycling possibilities.
A1 verb /kʌm/

come

Meaning
to move toward a place; to arrive at a place
Example
Please come to my birthday party.
B1 noun ˌkɒn.səˈveɪ.ʃən

conservation

Meaning
The protection of plants and animals, natural areas, and interesting and important structures and buildings, especially from the damaging effects of human activity.
Example
Conservation of forests is crucial for climate stability.
C1 verb /kliːv/

cleave

Meaning
to split or divide; to cut through forcefully
Example
He used an axe to cleave the wood.
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.
B1 noun /kənˈstrʌk.ʃən/

construction

Meaning
The building of something, typically a large structure.
Example
Construction dust significantly contributes to pollution.
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 verb /ˈkrɪtɪsaɪz/

criticize

Meaning
to express disapproval or find fault with someone or something
Example
The teacher criticized the student's poor handwriting.
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.
C2 noun /kəˈdɛnzə/

cadenza

Meaning
An elaborate solo passage in a piece of music, usually near the end.
Example
The pianist performed a brilliant cadenza before the final movement.
B2 adjective /kənˈtɛntɪd/

contented

Meaning
Feeling or expressing happiness and satisfaction.
Example
She was contented with her simple life.
C2 noun /tʃæf/

Chaff

Meaning
the husks of corn or other seed separated by winnowing; worthless things; light-hearted joking
Example
The farmer separated the wheat from the chaff using traditional methods.
C1 noun /ˈkrɛvɪs/

crevice

Meaning
a narrow crack or opening, especially in a rock or wall
Example
The lizard hid in a crevice between the stones.
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.
A2 noun /ˈkær.ɪk.tər/

Character

Meaning
the mental and moral qualities distinctive to an individual; a person in a novel, play, or film
Example
She showed great character by helping others during the crisis.
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 noun /ˌkɑːrboʊˈhaɪdreɪt/

carbohydrate

Meaning
a nutrient that provides energy, found in foods like rice, bread, and sugar
Example
Rice and potatoes are rich in carbohydrates.
B2 adjective /keɪˈɒtɪk/

Chaotic

Meaning
in a state of complete confusion and disorder
Example
The situation became chaotic after the announcement.
A2 adjective /ˈkruːəl/

cruel

Meaning
Willfully causing pain or suffering to others, or feeling no concern about it.
Example
It was cruel to make fun of the injured boy.
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.
C2 noun /kɔːrˈteɪʒ/

cortege

Meaning
a solemn procession, especially for a funeral
Example
A cortege of mourners followed the hearse to the cemetery.
A2 noun /koʊt/

Coat

Meaning
an outer garment worn over other clothes for warmth or protection
Example
He put on his winter coat before going outside.
B1 noun /ˈkærɪdʒ/

carriage

Meaning
a vehicle, typically a four-wheeled one, used for transporting goods or people, especially in the past
Example
The royal family traveled in a beautiful carriage during parades.
C2 noun /ˈkætɪtʃuː/

Catechu

Meaning
an extract from a tropical Asian plant, used in tanning and dyeing
Example
Catechu extract is commonly used in traditional medicine.
B2 noun /kəˈrɪkjələm/

curriculum

Meaning
The subjects comprising a course of study in a school, college, or university.
Example
The school updated its curriculum to include more digital literacy courses.
C2 noun /kəˈkɒfəni/

cacophony

Meaning
A harsh, discordant mixture of sounds.
Example
The cacophony of horns made it impossible to concentrate.
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.
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.
A2 noun /kɔɪnz/

coins

Meaning
Flat, typically round pieces of metal issued by a government as money.
Example
He collected old coins from different countries.
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.
B2 adjective /kənˈvɜːrtəbl/

convertible

Meaning
able to be changed into a different form or use; also a car with a roof that can be folded down
Example
She drove her new convertible along the coastal road.
C2 adjective /ˈkɒŋɡruənt/

congruent

Meaning
in agreement or harmony; having the same shape and size in geometry
Example
Their values are congruent with the goals of the organization.
B2 verb /ˈkæt.ɪ.ɡə.raɪzd/

categorized

Meaning
Placed in a particular class or group.
Example
The city was categorized as highly polluted.
B2 verb /ˈkɒmbæt/

combat

Meaning
to fight against something, especially to reduce or stop it
Example
The government is taking steps to combat corruption.
C1 noun kɒɡˈnɪʃ.ən

cognition

Meaning
The mental action or process of acquiring knowledge and understanding through thought, experience, and the senses.
Example
Cognition plays a key role in learning.
B1 verb /kəmˈpiːt/

compete

Meaning
to try to win or be more successful than others in a contest or activity
Example
Several companies compete for dominance in the market.
A2 verb kriˈeɪts

creates

Meaning
To bring something into existence or to cause something to happen
Example
Pollution creates environmental and health issues.
B2 verb /kɑːrv/

carve

Meaning
To cut or shape something, especially wood or stone, into a desired form.
Example
The artist carved a beautiful statue out of marble.
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.
C2 adjective /tʃeɪst/

Chaste

Meaning
pure and morally good; abstaining from sexual activity
Example
She lived a chaste and virtuous life.
B1 adjective /kəˈlɛktɪd/

collected

Meaning
calm and in control of oneself
Example
She remained calm and collected during the crisis.
C2 adjective /ˈkæloʊ/

callow

Meaning
Inexperienced and immature.
Example
The callow intern made several mistakes on his first day.
B2 verb /kriːp/

creep

Meaning
to move slowly and quietly; to make someone feel uncomfortable
Example
She crept quietly up the stairs to avoid waking anyone.
C1 noun /ˈkaʊərdɪs/

cowardice

Meaning
lack of courage; behavior showing fear
Example
His cowardice prevented him from speaking up.
C2 noun /ˈkæt.kɪn/

Catkin

Meaning
a drooping, often tasseled cluster of small flowers found on willow and birch trees
Example
The willow tree's catkins swayed gently in the spring breeze.
B2 noun /ˈklɪərəns/

clearance

Meaning
official permission or authorization; the removal of something unwanted; the distance between two objects
Example
The pilot received clearance to land the plane.
C1 noun /kəˈluːʒən/

collusion

Meaning
A secret agreement or cooperation, especially for an illegal or dishonest purpose.
Example
There was evidence of collusion between the officials and the contractors.
B2 noun /ˈkænən/

Cannon

Meaning
large heavy gun that fires cannonballs or shells
Example
The castle was defended by several large cannons.
A2 noun /keɪdʒ/

Cage

Meaning
a structure with bars or wire for keeping birds or animals
Example
The parrot lives in a large cage.
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.
C1 noun /ˈkæviˌæt/

caveat

Meaning
a warning or condition to be considered before taking action
Example
The proposal was accepted with one caveat.
C1 verb /tʃɑːr/

char

Meaning
To burn or scorch something so that it becomes blackened.
Example
The cook accidentally charred the steak.
C1 noun, verb /klɒt/

clot

Meaning
a thick mass of coagulated liquid, especially blood; to form such a mass.
Example
The doctor removed a blood clot from the patient.
A2 adjective /ˈsɛntrəl/

central

Meaning
Situated in the middle; of the greatest importance.
Example
Water is central to human survival.
B2 adverb /ˈkɒnsɪkwəntli/

consequently

Meaning
as a result; therefore
Example
He didn’t study, and consequently he failed the exam.
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.
B2 adverb /ˈklɒkwaɪz/

Clockwise

Meaning
in the direction that clock hands move; in a circular direction from left to right
Example
Turn the valve clockwise to tighten it.
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 /ˈkaʊ.ərd/

Coward

Meaning
a person who lacks the courage to do or endure dangerous or unpleasant things
Example
He called himself a coward for not standing up to the bully.
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 /ˈkrɪŋ.kəl/

crinkle

Meaning
To form small creases or wrinkles.
Example
She crinkled her nose at the strange smell.
C2 adjective /ˈkɒrɪdʒəbl/

corrigible

Meaning
capable of being corrected or improved
Example
The student's mistakes were corrigible with practice.
B2 noun /ˈkjuː.bɪ.kəl/

cubicle

Meaning
A small partitioned-off area of a room, typically in an office.
Example
She works in a cubicle with three other colleagues.
B2 noun /ˈkaʊn.tər/

counter

Meaning
a flat surface in a shop, bank, or kitchen where transactions or work are done
Example
The cashier stood behind the counter.
A1 noun /kæn/

Can

Meaning
a metal container for food or drink
Example
I opened a can of soup for lunch.
A2 noun /ˈsɛlˌfoʊn/

cellphone

Meaning
a portable telephone that uses a cellular network for wireless communication
Example
She forgot her cellphone at home and couldn’t call anyone.
B1 verb /kənˈvɪns/

convince

Meaning
to make someone believe or feel certain about something
Example
She convinced him to attend the meeting.
C1 adverb /ˈkrɒswaɪz/

Crosswise

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

carte blanche

Meaning
complete freedom to act as one wishes
Example
The manager gave her team carte blanche to design the project.
C2 noun /ˈkrɛməˌtɔːri/

crematory

Meaning
a place where dead bodies are cremated
Example
The crematory was located near the cemetery.
C1 noun /kəˈmoʊʃən/

commotion

Meaning
A state of noisy confusion or disturbance.
Example
The sudden commotion in the market drew everyone's attention.
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.
C2 adjective /ˈkɑːrnəl/

carnal

Meaning
Relating to physical, especially sexual, desires and appetites.
Example
The book explores the conflict between spiritual and carnal desires.
C1 adjective ˈkɒn.və.luː.tɪd

convoluted

Meaning
Extremely complex and difficult to follow; twisted or intricate.
Example
His argument was so convoluted that no one understood it.
C1 adjective /klaɪˈmæktɪk/

climactic

Meaning
Relating to the most exciting or important moment of something.
Example
The film ended with a climactic battle scene.
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.
C1 noun /sɛˈseɪʃən/

cessation

Meaning
The fact or process of ending or being brought to an end.
Example
There was a temporary cessation of hostilities.
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 /koʊˈiːvəl/

coeval

Meaning
Having the same age, date of origin, or duration; contemporary.
Example
The philosopher was coeval with the rise of modern science.
A2 noun /ˈkaʊ.bɔɪ/

Cowboy

Meaning
a man who tends cattle on a ranch, especially in the western United States
Example
The cowboy rode his horse across the vast prairie to find the cattle.
B1 noun /kənˌsɪdəˈreɪʃən/

consideration

Meaning
careful thought or attention to something before making a decision
Example
After much consideration, she accepted the job offer.
B2 verb /koʊp/

cope

Meaning
to deal effectively with something difficult
Example
She had to cope with a lot of pressure at work.
C1 noun /kəˈres/

Caress

Meaning
a gentle or loving touch
Example
The mother's gentle caress calmed the crying baby.
C1 noun /ˈtʃænsələr/

chancellor

Meaning
A senior state or legal official, or the head of a university.
Example
The chancellor delivered an inspiring speech at the graduation ceremony.
C2 noun /ʃɪˈfɒn/

chiffon

Meaning
A lightweight, sheer fabric often used in dresses or scarves.
Example
She wore a beautiful chiffon dress at the 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.