disprove
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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 /tjuːˈmʌltʃuəs/

tumultuous

Meaning
Characterized by disorder, noisy excitement, or emotional agitation.
Example
They had a tumultuous relationship full of ups and downs.
C1 adjective /ˈsɛm.ɪ.nəl/

seminal

Meaning
Strongly influencing later developments; highly original and influential.
Example
His seminal book changed the course of modern philosophy.
C1 adjective /ʌnˈspiːkəbl/

unspeakable

Meaning
too bad or shocking to be expressed in words
Example
The survivors endured unspeakable horrors during the war.
C1 noun ˌfɜːr.tɪ.laɪˈzeɪ.ʃən

fertilization

Meaning
The process of adding nutrients to soil to increase crop productivity.
Example
Organic fertilization enhances soil health.
C1 adjective /ˈwɜːrkəbəl/

Workable

Meaning
capable of being done or put into effect; practical
Example
We need a workable solution to solve this problem quickly.
C1 adjective /ˈsæv.i/

savvy

Meaning
Having practical knowledge and the ability to make good judgments.
Example
She is a tech-savvy entrepreneur.
C1 adjective /ʌnˈθɪŋkɪŋ/

unthinking

Meaning
done without careful thought; automatic or thoughtless
Example
His unthinking remark hurt her feelings.
C1 noun ˌdɪs.æmˌbɪɡ.juˈeɪ.ʃən

disambiguation

Meaning
The removal of ambiguity by making something clear and unambiguous.
Example
The AI system applies disambiguation to refine text understanding.
C1 noun /ˈækwɪˌdʌkt/

aqueduct

Meaning
a structure built to carry water over long distances
Example
The Romans built aqueducts to supply water to their cities.
C1 noun əˌkred.ɪˈteɪ.ʃən

accreditation

Meaning
The action or process of officially recognizing someone or something as having a particular status or being qualified to perform a particular activity.
Example
Accreditation ensures institutional credibility.
C1 adjective /ˌfɪl.hɑːrˈmɒn.ɪk/

philharmonic

Meaning
relating to a symphony orchestra or its music
Example
The philharmonic orchestra performed a stunning rendition of Beethoven's Ninth Symphony.
C1 noun /ˈsɜːr.vɪ.tuːd/

Servitude

Meaning
the state of being a slave or completely subject to someone more powerful
Example
Many people fought to escape the servitude imposed by the colonial system.
C1 noun prəˈfaʊnd ɪˈnɪʃətɪv

profound initiative

Meaning
A deep, meaningful, and significant action or program designed to create change.
Example
A profound initiative can create sustainable changes.
C1 adjective, noun /ˈdɛrəlɪkt/

derelict

Meaning
in poor condition due to neglect or disuse; a homeless or neglected person
Example
The old factory stood derelict for decades.
C1 adjective /ɪnˈhɛrənt/

inherent

Meaning
Existing in something as a natural, permanent, or essential quality.
Example
There are inherent risks in extreme sports.
C1 noun, adjective /ˈɡʊrmeɪ/

gourmet

Meaning
A person who appreciates fine food and drink; also refers to high-quality food.
Example
They went to a gourmet restaurant to celebrate their anniversary.
C1 adjective /əˈtjuːnd/

attuned

Meaning
Being receptive or sensitive to something; well adjusted or in harmony.
Example
She is attuned to the needs of her students.
C1 verb /dɪsˈɑːrm/

disarm

Meaning
to take weapons away from someone; to make someone feel less hostile
Example
The soldiers were ordered to disarm the rebels.
C1 noun /ˌɒk.sɪ.dʒɪˈneɪ.ʃən/

oxygenation

Meaning
The process of supplying or treating with oxygen.
Example
Deep breathing exercises improve oxygenation of the body.
C1 adjective /ˈkɒɡ.nɪ.zənt/

cognizant

Meaning
Having knowledge or being aware of something.
Example
He was cognizant of the risks before starting the project.
C1 noun /ˈzoʊdiæk/

Zodiac

Meaning
a belt of the heavens within which lie the paths of the sun, moon, and planets; the twelve astrological signs
Example
What is your zodiac sign?
C1 adjective /ˈspɑːrtn/

spartan

Meaning
showing simplicity and lack of luxury; austere
Example
He lived in a spartan room with just a bed and a chair.
C1 adjective,noun /kənˈtɪn.dʒənt/

contingent

Meaning
dependent on something else; a group of people representing an organization
Example
Attendance is contingent on prior registration. / A contingent of students attended the conference.
C1 noun /noʊˈteɪʃən/

notation

Meaning
A system of symbols or signs used to represent information, especially in mathematics or music.
Example
The teacher explained the notation used in the algebra equations.
C1 adjective /juːˈbɪkwɪtəs/

ubiquitous

Meaning
Existing or being everywhere at the same time.
Example
Social media has become ubiquitous among young people.
C1 noun /ˈkjuːmɪn/

Cumin

Meaning
A spice made from the dried seeds of a plant in the parsley family, with a warm earthy flavor
Example
Cumin is an essential spice in Indian and Middle Eastern cooking.
C1 noun /ˈpær.ə.saɪt/

Parasite

Meaning
an organism that lives on or in another organism and benefits at its expense; a person who depends on others
Example
The dog was treated for intestinal parasites.
C1 noun ˈredʒ.ɪ.strɑːr

registrar

Meaning
An official responsible for keeping records or registers.
Example
The registrar oversees all administrative tasks.
C1 noun /ɪmˈbɛzlmənt/

embezzlement

Meaning
The act of dishonestly taking money or property entrusted to one's care.
Example
The accountant was arrested for embezzlement of company funds.
C1 noun /ˈblɪs.tər/

Blister

Meaning
a small bubble on the skin filled with serum and caused by friction, burning, or other damage
Example
The new shoes gave her a painful blister on her heel.
C1 verb /sɪndʒ/

singe

Meaning
To burn something superficially or lightly, especially at the edges.
Example
The fire singed his eyebrows.
C1 verb /ˈnɪbəl/

nibble

Meaning
to take small bites of food
Example
The rabbit nibbled on a carrot.
C1 adjective /ˈsliːzi/

sleazy

Meaning
morally low, dirty, or cheap in quality
Example
He avoided the sleazy nightclub downtown.
C1 noun /ˈlɪbərəlɪzəm/

liberalism

Meaning
a political and social philosophy advocating individual freedoms, democracy, and equality
Example
Liberalism emphasizes freedom of speech and human rights.
C1 verb /ɪnˈhɪbɪt/

inhibit

Meaning
to prevent or restrain someone or something from acting freely; to hinder
Example
Fear can inhibit personal growth.
C1 adjective /ˈdrɪəri/

dreary

Meaning
dull, bleak, and lifeless; depressing
Example
The long, dreary winter made everyone feel gloomy.
C1 adjective /pəˈfʌŋk.tər.i/

perfunctory

Meaning
done without much effort, interest, or thought
Example
He gave a perfunctory nod and walked away.
C1 noun /əˈboʊd/

abode

Meaning
a place of residence; a home
Example
They invited us to their humble abode.
C1 verb /dɪˈfeɪs/

deface

Meaning
to spoil the surface or appearance of something, especially by writing or drawing on it
Example
The vandals defaced the wall with graffiti.
C1 adjective /əˈtrəʊ.ʃəs/

Atrocious

Meaning
horrifyingly wicked; extremely bad or unpleasant
Example
The conditions in the prison were atrocious.
C1 noun/verb /kwɪp/

quip

Meaning
A witty remark; to make a witty or clever comment.
Example
She quipped about the weather during the meeting.
C1 noun /ˈblʌd.ʃed/

Bloodshed

Meaning
the killing or wounding of people, typically in large numbers during a conflict
Example
The peace treaty was signed to prevent further bloodshed.
C1 noun /ˈɪnlɛt/

inlet

Meaning
A small arm of the sea, a lake, or a river; an opening or passage for entry.
Example
The boat entered a narrow inlet along the coast.
C1 noun /ˈnjuːtrɪənt dɪˈfɪʃənsi/

nutrient deficiency

Meaning
A lack of essential nutrients required for healthy plant growth, which can result in poor crop development, reduced yields, and increased susceptibility to diseases.
Example
Nutrient deficiency in the soil can reduce crop productivity.
C1 noun /ˌriː.dɪs.trɪˈbjuː.ʃən/

redistribution

Meaning
The sharing of wealth or resources more equally among society.
Example
The government introduced a redistribution policy to reduce inequality.
C1 noun /ˈɪtʃ.i.nəs/

itchiness

Meaning
The quality or condition of feeling an irritating sensation on the skin that causes a desire to scratch.
Example
Eye itchiness often leads to rubbing.
C1 verb /ˈflɪk.ər/

flicker

Meaning
to shine unsteadily or waver between light and dark
Example
The candle flickered in the wind.
C1 noun /ɪmˈpɛdɪmənt/

impediments

Meaning
A hindrance or obstruction in doing something; things that prevent progress or achievement.
Example
Economic impediments often hinder social development.
C1 adjective /ˈpɛtjʊlənt/

petulant

Meaning
Childishly sulky or bad-tempered.
Example
The child became petulant when denied more candy.
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 noun /dʌsk/

Dusk

Meaning
the period of the day when daylight is fading; twilight
Example
They walked along the beach during dusk, watching the sunset.
C1 adjective /ʌnˈsɪvəl/

Uncivil

Meaning
not polite or courteous; rude and discourteous in behavior
Example
His uncivil remarks during the meeting offended everyone present.
C1 adjective /ˈliː.ni.ənt/

Lenient

Meaning
tolerant; forgiving; merciful; not strict in punishment or judgment
Example
The teacher was lenient with students who submitted their homework late.
C1 noun /ˈmælɪs/

Malice

Meaning
The intention or desire to do evil; ill will
Example
There was no malice in his criticism, just honest feedback.
C1 noun /dɪˈsaɪ.pəl/

Disciple

Meaning
a follower and student of a teacher, leader, or philosopher; devoted follower
Example
The famous philosopher had many disciples who spread his teachings worldwide.
C1 verb /ˈtæmpər/

tamper

Meaning
To interfere with something in a harmful, unauthorized, or improper way.
Example
The evidence was tampered with before the trial.
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 adjective /kəmˈpensətɔːri/

compensatory

Meaning
serving to make up for a loss, damage, or injury
Example
The court awarded him compensatory damages.
C1 adjective /ɡlʌm/

Glum

Meaning
sad; dejected; downcast; gloomy
Example
He looked glum after hearing the bad news.
C1 noun /ˈpɔːpər/

pauper

Meaning
A very poor person.
Example
The pauper begged for food on the street corner.
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 noun /ˈɡlædiˌeɪtər/

gladiator

Meaning
A man trained to fight in public contests in ancient Rome.
Example
The gladiator fought bravely in the arena.
C1 adjective /ˈbɒt.əl ɡriːn/

Bottle-green

Meaning
a dark green color similar to that of a green glass bottle
Example
She wore a beautiful bottle-green dress to the evening party.
C1 noun /ˌdʒuː.bɪˈleɪ.ʃən/

jubilation

Meaning
a feeling or expression of great happiness and triumph
Example
There was jubilation in the streets after the victory.
C1 noun ˈθɜː.məl stres

thermal stress

Meaning
Stress caused by excessive heat that affects plant growth and development.
Example
High thermal stress affects plant growth.
C1 verb /uːz/

ooze

Meaning
to slowly flow or leak out through small openings or pores
Example
Blood began to ooze from the small cut.
C1 adjective /ˈroʊ.ɡɪʃ/

Roguish

Meaning
mischievous; playfully dishonest
Example
His roguish smile suggested he was up to some mischief.
C1 verb /ˈɒp.tɪ.maɪz/

optimize

Meaning
To make the best or most effective use of a situation, opportunity, or resource.
Example
The company is working to optimize its supply chain.
C1 verb /ˈhæɡəl/

haggle

Meaning
to argue about the price; to bargain persistently
Example
They haggled over the price for an hour.
C1 adjective /ˈperɪʃəbəl/

Perishable

Meaning
liable to decay quickly; short-lived
Example
Store perishable foods in the refrigerator.
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 /kənˈstɪtʃuənsi/

constituency

Meaning
A geographical area whose residents elect a representative to a legislative body.
Example
She campaigned tirelessly across her constituency.
C1 verb /rɪˈtreɪs/

retrace

Meaning
to go back over a path or route; to recall and repeat steps taken earlier
Example
She retraced her steps to find her lost keys.
C1 verb /rɪˈbjuːk/

rebuke

Meaning
to criticize or scold sharply; to express disapproval
Example
The teacher had to rebuke the student for cheating.
C1 noun /ˈdiːvə/

diva

Meaning
a famous female singer; a woman who is admired or behaves like a star
Example
The pop diva performed her latest hit to a cheering crowd.
C1 noun kəˈmjunəl ˈhɑrməni

communal harmony

Meaning
Peaceful coexistence and cooperation among different groups in a community.
Example
Maintaining communal harmony requires mutual respect and understanding.
C1 verb /ˌkɒntrəˈviːn/

contravene

Meaning
to go against or act in opposition to a law, rule, or agreement
Example
He contravened the safety regulations and was fined.
C1 verb /ˈspɪərˌhɛd/

spearhead

Meaning
to lead or initiate an action, project, or movement
Example
She spearheaded the campaign for environmental awareness.
C1 noun /ˈɡoʊld.smɪθ/

Goldsmith

Meaning
a person who makes or repairs articles of gold
Example
The goldsmith crafted a beautiful wedding ring.
C1 noun /njʊəˈrəʊ.sɪs/

neurosis

Meaning
A relatively mild mental illness that is not caused by organic disease, involving symptoms of stress.
Example
His neurosis made social interactions difficult.
C1 adverb /ˈsɜːrtʃɪŋli/

searchingly

Meaning
In a way that seems to look for hidden meanings or truth.
Example
She looked at him searchingly, hoping for an honest answer.
C1 noun /rɪˈsaɪtər/

reciter

Meaning
a person who recites or repeats something aloud from memory, especially poetry, prayers, or formal texts
Example
The reciter delivered the poem with clarity and emotion.
C1 noun ˌdiːˌrɛɡ.jʊˈleɪ.ʃən

deregulation

Meaning
The removal or reduction of government regulations in an economic sector.
Example
Deregulation has increased competition in the telecommunications sector.
C1 noun /ˌdɪs.əˈreɪ/

disarray

Meaning
A state of disorganization or untidiness; confusion or disorder.
Example
His desk was in complete disarray.
C1 verb /ˈæmpjʊteɪt/

amputate

Meaning
to cut off a limb from the body by surgery
Example
The doctors had to amputate his leg after the accident.
C1 adjective /ˈbreɪzən/

brazen

Meaning
Bold and without shame; shameless.
Example
She made a brazen attempt to lie in front of everyone.
C1 noun /ˌkɒn.stəˈleɪ.ʃən/

constellation

Meaning
a group of stars forming a recognizable pattern in the night sky
Example
Orion is one of the most famous constellations.
C1 noun /ˈɑːrmfʊl/

armful

Meaning
As much as can be carried in one or both arms.
Example
She carried an armful of books into the library.
C1 noun /ˈpæs.ɪ.fɪst/

pacifist

Meaning
a person who believes in peace and opposes war or violence
Example
She is a committed pacifist who campaigns against armed conflict.
C1 adjective /ˈpɪθ.i/

pithy

Meaning
concise and meaningful; full of substance
Example
She gave a pithy comment that summarized the issue perfectly.
C1 noun /moʊld/

Mould

Meaning
a hollow container used to give shape to molten material; fungus
Example
She poured chocolate into the mould to make candies.
C1 noun /ˈrɛnɪˌɡeɪd/

renegade

Meaning
a person who deserts or betrays an organization, country, or principles
Example
He was labeled a renegade after leaving the party and criticizing its policies.
C1 noun /ˈnɔːrməlsi/

normalcy

Meaning
The condition of being normal; a return to usual or expected conditions.
Example
After the flood, the town struggled to regain a sense of normalcy.
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 /θræʃ/

thrash

Meaning
to beat someone or something violently; to move wildly or violently
Example
The angry man threatened to thrash his opponent.
C1 noun /ˈbaɪoʊˌsfɪr/

Biosphere

Meaning
the regions of the surface and atmosphere of the earth occupied by living organisms
Example
Climate change is affecting the entire biosphere.
C1 noun /ˌdɪp.ləˈmæt.ɪk ˈmaɪl.stəʊn/

diplomatic milestone

Meaning
A significant achievement or important event in diplomatic relations.
Example
Hosting the summit was a diplomatic milestone.
C1 adjective /ˈswoʊlən/

swollen

Meaning
Enlarged or puffed up, usually due to injury, inflammation, or fluid accumulation
Example
Her ankle was swollen after she twisted it during the hike.
C1 noun /ˈriːpər/

reaper

Meaning
a person or machine that cuts and gathers crops
Example
The reaper moved slowly through the golden fields.
C1 noun /ˈɜːrθənˌwɛr/

earthenware

Meaning
pottery made of clay and hardened by heat
Example
The shop displayed beautiful earthenware pots and bowls.
C1 verb /snɪər/

sneer

Meaning
to smile or speak in a mocking or contemptuous way
Example
She sneered at his attempt to sing.
C1 noun /kəˈloʊkwiəˌlɪzəm/

colloquialism

Meaning
a word or phrase used in informal speech or writing
Example
The novel is full of regional colloquialisms.
C1 adjective /ɪɡˈzuːbərənt/

exuberant

Meaning
full of energy, excitement, and cheerfulness
Example
The children were exuberant after winning the game.
C1 noun /ˈkælkjʊləs/

calculus

Meaning
A branch of mathematics concerned with rates of change and accumulation; also a hard mineral deposit in the body such as on teeth.
Example
Calculus is essential for advanced studies in physics and engineering.
C1 adjective /rɪˈper.ə.bəl/

Repairable

Meaning
able to be fixed or mended; capable of being repaired
Example
The broken phone is repairable with the right parts.
C1 adjective /əbˈsɛsɪv/

obsessive

Meaning
Relating to or characterized by an obsession; thinking about something too much.
Example
He has an obsessive interest in cleanliness.
C1 adjective /ʌnˈsɪvəlaɪzd/

Uncivilized

Meaning
not developed in terms of civilization; lacking social organization and culture; barbarous
Example
The explorers encountered an uncivilized tribe deep in the Amazon rainforest.
C1 adjective /ˈɜːrstwaɪl/

erstwhile

Meaning
former or in the past
Example
They were erstwhile friends but no longer speak.
C1 verb /ˈsɪnɚdʒaɪzd/

synergized

Meaning
Combine in such a way that the total effect is greater than the sum of the individual effects.
Example
The teams were synergized to maximize productivity.
C1 adverb /ˌwɛr.əˈpɒn/

whereupon

Meaning
Immediately after which; as a result of which.
Example
He confessed his mistake, whereupon she forgave him.
C1 verb /ˈænɪmeɪt/

animate

Meaning
to bring to life or make lively; to create animation for films or cartoons
Example
The artist will animate the characters for the movie.
C1 adjective /spɑːrs/

sparse

Meaning
thinly scattered or distributed; not dense or abundant
Example
Vegetation was sparse in the desert.
C1 noun /ˌɪnˈdɪsəplɪn/

indiscipline

Meaning
lack of discipline or self-control; failure to obey rules or maintain order
Example
Indiscipline among the students disrupted the learning environment.
C1 adjective /əˈmiːnəbl/

amenable

Meaning
willing to cooperate or be influenced; open to suggestions
Example
She was amenable to the idea of working longer hours.
C1 verb əˈblɪt.ə.reɪt

obliterate

Meaning
To destroy utterly; wipe out completely, to erase or remove something completely.
Example
The storm obliterated entire villages.
C1 noun /ɪkˌsperɪˈmɛnteɪʃən/

experimentation

Meaning
The process of performing a scientific procedure to make a discovery, test a hypothesis, or demonstrate a known fact.
Example
Experimentation leads to groundbreaking products.
C1 verb /bɪˈstoʊ/

bestow

Meaning
To give or present something as a gift or honor.
Example
The king bestowed honors upon the brave soldiers.
C1 noun /ˈʃæmbəlz/

shambles

Meaning
a state of complete disorder or ruin
Example
After the storm, the whole town was in shambles.
C1 noun /əˈvɜːrʒən/

aversion

Meaning
a strong feeling of dislike or unwillingness towards something
Example
She has a strong aversion to smoking.
C1 verb /ˈbɑːrtər/

barter

Meaning
To exchange goods or services without using money.
Example
They bartered their crops for handmade tools.