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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 /ˈsɛntɪˌliːtər/

centiliter

Meaning
A metric unit of capacity equal to one hundredth of a liter.
Example
The recipe calls for 20 centiliters of milk.
C1 adjective /ˈɜːrθ.li/

Earthly

Meaning
relating to the earth or human life; worldly; material rather than spiritual
Example
He focused on earthly pleasures rather than spiritual growth.
C1 noun /ˈhaɪbrɪd/

hybrid

Meaning
a mixture of two different things, often combining the best qualities of both
Example
The car is a hybrid that runs on both electricity and fuel.
C1 noun /ɪnˈækjʊrəsi/

inaccuracy

Meaning
lack of accuracy or precision; an incorrect or wrong detail
Example
The report contained several factual inaccuracies.
C1 verb /praɪ/

pry

Meaning
to look closely into something; to try to find out private information
Example
She tried to pry into her neighbor’s private life.
C1 adjective /əˈnæl.ə.ɡəs/

analogous

Meaning
Comparable in certain respects, typically in a way that makes clearer the nature of things being compared.
Example
The human brain is analogous to a supercomputer.
C1 noun /ˈpoʊl.stɑːr/

Polestar

Meaning
a bright star that appears to stay in the same position in the sky and is used for navigation
Example
Sailors used the polestar to navigate across the ocean.
C1 adjective ˈtæs.ɪt

tacit

Meaning
Understood or implied without being openly expressed or stated
Example
Their mutual understanding was based on tacit agreement.
C1 noun /ˌsæl.ɪ.naɪˈzeɪ.ʃən/

salinization

Meaning
The process of increasing salt content in soil.
Example
Excessive irrigation can cause salinization of farmland.
C1 adjective /ˈræb.ɪd/

rabid

Meaning
Having extreme or fanatical support for something; relating to or suffering from rabies.
Example
He was a rabid fan of the football team.
C1 noun sælˈveɪʃən

salvation

Meaning
Deliverance from sin and its consequences, believed by Christians to be brought about by faith in Christ.
Example
The story revolves around the theme of salvation.
C1 noun ˈɛksəʊˌplænɪt

exoplanet

Meaning
A planet that orbits a star outside the solar system.
Example
Astronomers have discovered thousands of exoplanets in the last decade.
C1 verb /ˌpriːˈmɛdɪteɪt/

premeditate

Meaning
to think about and plan something (especially a crime) beforehand
Example
The suspect was accused of premeditating the crime.
C1 verb /piːk/

pique

Meaning
to stimulate interest or curiosity; to arouse resentment or anger
Example
Her remarks piqued his curiosity about the secret project.
C1 adjective /ˈfrɔːdjʊlənt/

fraudulent

Meaning
Involving or using deceit, especially criminal deception.
Example
He was arrested for making fraudulent insurance claims.
C1 noun /ˈtʃæs.tɪ.ti/

Chastity

Meaning
the practice of refraining from extramarital or premarital sexual relations; sexual purity
Example
Many religious traditions value chastity as a virtue of moral purity.
C1 verb, noun /ˈɡrɪməs/

grimace

Meaning
to make an ugly, twisted expression on one's face, usually in disgust or pain
Example
He grimaced when he tasted the sour fruit.
C1 noun /ˈdaɪnəˌmoʊ/

dynamo

Meaning
A machine that generates electricity; a person with great energy and enthusiasm.
Example
She is the real dynamo behind the success of the company.
C1 noun ˌlɪt.ɪˈɡeɪ.ʃən

litigation

Meaning
The process of taking legal action; a lawsuit.
Example
The litigation accused the regime of human rights abuses.
C1 verb, noun /sæp/

sap

Meaning
As a noun: the vital fluid in plants; As a verb: to gradually weaken or drain strength.
Example
The long journey began to sap his energy.
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 adjective /ˌmɛtəˈfɔːrɪkəl/

metaphorical

Meaning
Characteristic of or relating to metaphor; figurative rather than literal.
Example
He used metaphorical language to describe his emotions.
C1 adverb /əˈlɜːrtli/

alertly

Meaning
in a watchful, attentive, and quick-to-notice manner
Example
She listened alertly to every sound in the dark forest.
C1 verb /ʌnˈroʊl/

unroll

Meaning
to open something that is rolled up; to spread out gradually
Example
She unrolled the map on the table to find the route.
C1 noun /ˈpɜːrdʒəri/

perjury

Meaning
The offense of willfully telling an untruth in a court after taking an oath.
Example
She was convicted of perjury after giving false evidence.
C1 verb /reɪz/

raze

Meaning
To completely destroy or demolish something, especially a building.
Example
The old factory was razed to make way for new apartments.
C1 noun /ˈsɔːjər/

Sawyer

Meaning
a person who saws wood, especially as an occupation
Example
The skilled sawyer cut the logs into planks.
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.
C1 adjective /ˌɛpɪˈsɒdɪk/

episodic

Meaning
Happening occasionally or in separate parts; related to episodes.
Example
Her interest in art was episodic, coming and going over the years.
C1 noun /rɑk sɔlt/

Rock Salt

Meaning
natural salt crystals formed from evaporated ancient seas; unrefined salt
Example
Rock salt is considered healthier than table salt.
C1 noun /rɪˈkɒnɪsəns/

reconnaissance

Meaning
A survey or exploration, especially for military or strategic purposes.
Example
The soldiers conducted a reconnaissance of the enemy camp.
C1 verb /ˈhʌsəl/

hustle

Meaning
to move quickly and energetically; to push or work hard to achieve something
Example
She had to hustle to finish the project on time.
C1 noun /ˈfɔːreɪ/

foray

Meaning
A sudden short attack or attempt, especially into new activity or territory.
Example
The company made its first foray into the international market.
C1 adjective /ˌɪnkənˈsiːvəbl̩/

inconceivable

Meaning
Impossible to imagine or believe; beyond comprehension.
Example
It seemed inconceivable that she could finish the marathon after such little training.
C1 noun /məˈdɜːrnəti/

modernity

Meaning
The quality or condition of being modern; up-to-date ideas, practices, or style.
Example
The city’s architecture reflects both tradition and modernity.
C1 noun ˈæ.sɛt ˌæl.əˈkeɪ.ʃən

asset allocation

Meaning
An investment strategy that aims to balance risk and reward by apportioning a portfolio's assets according to an individual's goals, risk tolerance, and investment horizon.
Example
Proper asset allocation is key to financial growth.
C1 adjective ˌɪn.təˈmɪt.ənt

intermittent

Meaning
Happening irregularly, not continuously.
Example
The rain was intermittent throughout the day.
C1 noun, verb /raʊt/

rout

Meaning
A decisive defeat; to defeat completely.
Example
The army routed the enemy forces in the battle.
C1 adjective /ˈpəʊtəbl/

potable

Meaning
safe to drink; drinkable
Example
The villagers did not have access to potable water.
C1 noun ˌvɜː.səˈtɪl.ɪ.ti

versatility

Meaning
Ability to adapt or be adapted to many different functions or activities; having many different skills.
Example
His versatility made him successful in multiple fields.
C1 adjective /ɪkˈskjuːzəbl/

excusable

Meaning
Able to be forgiven or justified.
Example
Her mistake was excusable given the circumstances.
C1 noun /vəˈræs.ə.ti/

veracity

Meaning
Conformity to facts; accuracy and truthfulness.
Example
The journalist checked the veracity of the report.
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 /ˌɑːrtʃˈbɪʃəp/

archbishop

Meaning
A senior bishop in charge of an archdiocese in the Christian Church.
Example
The archbishop delivered a sermon to thousands of people.
C1 noun, verb /ˌprɒməˈneɪd/

promenade

Meaning
A leisurely walk or stroll, especially in a public place for pleasure or display.
Example
They went for a promenade along the seaside.
C1 adjective /ˌɪntəˈrɑːɡətɪv/

interrogative

Meaning
Relating to or conveying a question; in grammar, used to form questions.
Example
She raised an interrogative eyebrow when she heard the news.
C1 adverb /əˈfrɛʃ/

afresh

Meaning
From the beginning, in a new way.
Example
After the failure, they started the project afresh.
C1 adjective /ɪnˈdetɪd/

Indebted

Meaning
owing money or gratitude to someone; obligated; grateful
Example
I am deeply indebted to my teacher for all her guidance.
C1 noun /ˈɒntreɪ/ (UK), /ˈɑːntreɪ/ (US)

entree

Meaning
The main course of a meal (US); the right to enter or access (formal).
Example
The restaurant’s signature steak was served as the main entree.
C1 verb /ˈnʌlɪfaɪ/

nullify

Meaning
to make something legally invalid or ineffective
Example
The court decided to nullify the contract.
C1 noun /haɪˈpɒtənjuːs/

hypotenuse

Meaning
the longest side of a right-angled triangle, opposite the right angle.
Example
In a right triangle, the hypotenuse is always longer than the other two sides.
C1 noun /ˈmɔːr.ɡɪʤ/

Mortgage

Meaning
a legal agreement by which a bank lends money to buy property
Example
They took out a mortgage to buy their first house.
C1 noun /sɪr/

seer

Meaning
A person who is supposed to be able to see what will happen in the future; a prophet.
Example
The seer predicted a great change in the kingdom.
C1 noun ˈsʌb.tɛkst

subtext

Meaning
Hidden meaning or message behind spoken or written words
Example
The subtext of his speech suggested disagreement.
C1 noun /ˈɡlɒs.ər.i/

Glossary

Meaning
an alphabetical list of terms in a particular domain of knowledge with explanations; a brief dictionary
Example
The textbook includes a helpful glossary at the end to define technical terms.
C1 adjective /ˈpæl.ɪd/

Pallid

Meaning
pale, especially because of poor health; lacking substance or vitality
Example
His pallid complexion showed signs of illness.
C1 adjective /ˈtep.ɪd/

Tepid

Meaning
only slightly warm; lukewarm; showing little enthusiasm
Example
The tea was tepid and unappetizing.
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 noun səˈsteɪnəbəl ˈpræktɪsɪz

sustainable practices

Meaning
Methods and activities that can be maintained over time without depleting natural resources or harming the environment.
Example
Sustainable practices are vital for environmental preservation.
C1 noun /ˈrɪpəl/

Ripple

Meaning
a small wave on the surface of water; a spreading effect or influence
Example
The stone created ripples across the calm pond.
C1 adjective /ɪmˈpɜːmiəbl/

impermeable

Meaning
Not allowing fluid or gas to pass through.
Example
The container is made of impermeable plastic.
C1 adjective /rɪˈsɛsɪv/

recessive

Meaning
In genetics, relating to a trait that is expressed only when two copies of the gene are present.
Example
Blue eye color is often a recessive trait.
C1 adjective /ɪnˈtjuː.ɪ.tɪv/

intuitive

Meaning
Based on instinctive understanding rather than reasoning.
Example
The software has an intuitive design that makes it easy to use.
C1 adjective /ˈstæɡ.nənt/

Stagnant

Meaning
not moving or flowing; showing no activity or development
Example
The stagnant water in the pond was covered with algae.
C1 verb /ˌdɪsɪnˈtæŋɡl/

disentangle

Meaning
To free something or someone from a tangle or complication.
Example
She tried to disentangle her hair from the branches.
C1 adjective /ˈdɛkədənt/

decadent

Meaning
Characterized by or reflecting a state of moral or cultural decline; excessively self-indulgent.
Example
The party was filled with decadent luxury and excess.
C1 noun ˈnærətɪv staɪl

narrative style

Meaning
The way in which a story is told, including the point of view and the voice of the narrator.
Example
Dickens' narrative style is engaging and emotional.
C1 verb /dɪsˈpruːv/

disprove

Meaning
to show that something is false or wrong
Example
The scientist worked hard to disprove the old theory.
C1 adjective /ˈdaɪ.si/

dicey

Meaning
Risky or unpredictable; potentially dangerous.
Example
Investing in that company looks pretty dicey right now.
C1 noun /ˈkɑːrtrɪdʒ/

cartridge

Meaning
A container holding a substance or device, such as ink for printers or bullets for firearms.
Example
The printer stopped working because the ink cartridge was empty.
C1 verb bɪˈkwiːð

bequeath

Meaning
Leave something to someone in a will; pass down or hand down to the next generation.
Example
The scientist bequeathed his research papers to the university.
C1 noun ˌpriːˌɒkjʊˈpeɪʃən

preoccupation

Meaning
The state of being absorbed in thought; mental distraction.
Example
His preoccupation with work led to neglecting his personal life.
C1 noun /fiːnd/

fiend

Meaning
an evil spirit or demon; a wicked or cruel person; someone obsessed with a particular thing
Example
He is a real fiend when it comes to solving puzzles.
C1 noun /ˈmænɪkɪn/

mannequin

Meaning
a life-sized model of a human figure used by shops to display clothes
Example
The mannequin in the shop window was dressed in a red gown.
C1 noun /prɒɡˈnoʊsɪs/

prognosis

Meaning
A forecast of the likely outcome of a disease or situation.
Example
The doctor gave a positive prognosis for the patient's recovery.
C1 adjective /ˈtɛn.ju.əs/

tenuous

Meaning
Very weak, thin, or slight; lacking a strong basis.
Example
The evidence against him is quite tenuous.
C1 adjective /ˈrævənəs/

ravenous

Meaning
Extremely hungry; famished.
Example
After the long hike, she was ravenous and ate quickly.
C1 noun /ˌplɔː.zəˈbɪl.ə.ti/

plausibility

Meaning
The quality of being reasonable or probable.
Example
The plausibility of his explanation convinced the jury.
C1 verb /ˈrɛplɪkeɪt/

replicate

Meaning
to copy, reproduce, or duplicate something exactly
Example
The scientist tried to replicate the experiment for accuracy.
C1 noun /ˈpæl.ə.tə.bəl miːt/

Palatable meat

Meaning
Meat that is pleasant to taste; appetizing meat dish
Example
The chef prepared palatable meat dishes for the dinner party.
C1 noun /dɪˌsem.ɪˈneɪ.ʃən/

dissemination

Meaning
The action or fact of spreading something, especially information, widely.
Example
The dissemination of false information is a major issue.
C1 adjective /ˈmɪnəskjuːl/

minuscule

Meaning
extremely small in size or importance
Example
She made only a minuscule contribution to the project.
C1 verb /ɪnˈvɜːrt/

invert

Meaning
To turn something upside down or in the opposite position, order, or direction.
Example
He inverted the glass to let the water drain out.
C1 verb/noun /ˈkwɪbəl/

quibble

Meaning
To argue or raise objections about a trivial matter; a petty objection.
Example
They quibbled over who should pay the bill.
C1 noun /rɪˈvʌlʃən/

revulsion

Meaning
a strong feeling of disgust or repulsion
Example
She felt revulsion at the sight of the cruel act.
C1 adjective /ˈkɔːrəl/

choral

Meaning
Relating to, written for, or performed by a choir or chorus.
Example
The church hosted a choral performance on Sunday.
C1 noun /ˌpɜːrmjuˈteɪʃən/

permutation

Meaning
An arrangement or reordering of elements, often in mathematics or logic.
Example
The puzzle can be solved by trying all possible permutations of the tiles.
C1 verb /ˈɪtəreɪt/

iterate

Meaning
To repeat a process or statement, often to improve or refine.
Example
The software team will iterate the design until it meets user needs.
C1 verb /ˈiːkwəlaɪz/

equalize

Meaning
To make equal or level in status, value, or amount.
Example
The team equalized the score in the last minute.
C1 adjective /ʌnˈfɛtərd/

unfettered

Meaning
not restricted or confined; free
Example
The artist enjoyed unfettered freedom of expression.
C1 noun ˈdɪskɔrd

discord

Meaning
Disagreement or conflict between people or ideas.
Example
Discord among people disrupts societal stability.
C1 noun ˈmɪl.ɪ.tər.i ɪnˈkɜː.ʃən

military incursion

Meaning
A sudden armed attack or invasion by military forces into a territory.
Example
The military incursion caused widespread devastation.
C1 adjective /ˈɜːrksəm/

irksome

Meaning
annoying or irritating
Example
Waiting in a long line is one of the most irksome tasks.
C1 noun /ˌsɪmbɪˈəʊsɪs/

symbiosis

Meaning
A mutually beneficial relationship between different people or groups.
Example
The symbiosis between the two companies led to mutual growth.
C1 adverb /ˈleŋθ.waɪz/

Lengthwise

Meaning
in the direction of the length; along the longest dimension
Example
Fold the paper lengthwise to make it easier to carry.
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 adjective /ˈʌndərhænd/

underhand

Meaning
done secretly and dishonestly; deceitful
Example
The politician was accused of using underhand tactics to win the election.
C1 noun /ˌdɪsbɪˈliːvər/

disbeliever

Meaning
a person who does not believe in something, especially a religion or idea
Example
He was called a disbeliever for rejecting the traditional faith.
C1 noun /ɪnˈfɜːməri/

infirmary

Meaning
A hospital or place where the sick or injured are cared for.
Example
The school had an infirmary for minor injuries.
C1 noun /ˈfɔːrˌfɑːðər/

forefather

Meaning
an ancestor, especially one who was part of an earlier generation of a family or nation
Example
Our forefathers fought for independence.
C1 noun /ˌmɔːrəˈtɔːriəm/

moratorium

Meaning
A temporary suspension or delay of an activity, law, or obligation.
Example
The government announced a moratorium on new mining licenses.
C1 verb ˈsɪn.θə.saɪ.zɪŋ

synthesizing

Meaning
Combine (a number of things) into a coherent whole.
Example
He excels in synthesizing ideas from different sources.
C1 adjective /ˈfɔːrθˌraɪt/

forthright

Meaning
Direct and honest in speech or behavior; straightforward.
Example
She was forthright in her criticism of the policy.
C1 noun /ɛnˈdɔːr.fɪnz/

endorphins

Meaning
Chemical compounds produced by the brain that reduce pain and create feelings of happiness.
Example
Exercise releases endorphins, reducing stress and pain.
C1 verb /deɪz/

daze

Meaning
to stun or confuse someone temporarily with a shock or surprise
Example
The bright lights dazed the runners as they entered the stadium.
C1 adjective /ˈfɪs.kəl/

fiscal

Meaning
Relating to government revenue, especially taxes, or public money management.
Example
The government introduced new fiscal policies to control inflation.
C1 verb /ænˈtæɡənaɪz/

antagonize

Meaning
to cause someone to become hostile or angry; to provoke opposition
Example
His rude remarks only served to antagonize his colleagues.
C1 verb /ˈsɔːntər/

saunter

Meaning
to walk in a slow, relaxed manner without hurry or effort
Example
We sauntered along the riverside, stopping now and then to watch the boats.
C1 noun /dɪˈsɜːn.mənt/

discernment

Meaning
The ability to judge well or understand something correctly; keen insight.
Example
His discernment in business decisions made him successful.
C1 verb /kəmˈpjuːt/

compute

Meaning
To calculate or determine by using a computer or mathematical methods.
Example
The software can compute the total cost in seconds.
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 adjective ˈek.wɪ.tə.bəl

equitable

Meaning
Fair and impartial
Example
Equitable AI ensures fairness in technology use.
C1 noun /ˈfreɪlti/

frailty

Meaning
The condition of being weak, delicate, or easily broken.
Example
Old age often comes with physical frailty.
C1 noun /ˈhiːdənɪst/

hedonist

Meaning
A person who believes that the pursuit of pleasure is the most important thing in life.
Example
She was called a hedonist because she always prioritized enjoyment over duty.
C1 verb /ɪnˈfjuːz/

infuse

Meaning
to fill or spread through something; to instill a quality, idea, or feeling
Example
The teacher tried to infuse her students with a love for reading.
C1 adjective /ɪɡˈzuːbərənt/

exuberant

Meaning
full of energy, excitement, and cheerfulness
Example
The children were exuberant after winning the game.
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 adverb ɪkˌsperɪˈmentəli

experimentally

Meaning
In a way that is based on or derived from experiment and observation rather than theory.
Example
Bose demonstrated findings experimentally.
C1 adjective /rɪˈdʒɛn.ə.rə.tɪv/

regenerative

Meaning
Able to restore or renew damaged environments, soil, or resources.
Example
Regenerative farming improves soil health and biodiversity.
C1 verb, noun /ˈbʌsəl/

bustle

Meaning
to move in an energetic or noisy manner; busy activity in a place
Example
The marketplace bustled with vendors and customers.