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C1 adjective /ˈkɒnvɛks/

convex

Meaning
curved or rounded outward
Example
The lens has a convex shape to focus light.
C1 adjective /ˌʌnbɪˈkʌmɪŋ/

unbecoming

Meaning
Not proper or appropriate for a person; unsuitable.
Example
His rude behavior was unbecoming of a leader.
C1 noun /ˈfjuː.tʃə.rɪst/

futurist

Meaning
A person who studies or predicts the future, especially trends in science, technology, or society.
Example
The futurist predicted major changes in transportation within the next decade.
C1 adjective /ɪmˈpɑːrʃəl/

Impartial

Meaning
treating all sides fairly; unbiased; neutral
Example
A good judge must remain impartial throughout the trial.
C1 noun /əˈvɜːrʒən/

aversion

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

strand

Meaning
Noun: A single thin length of thread, wire, or similar. Verb: To leave someone or something without a way of moving or leaving.
Example
The storm stranded many tourists on the island.
C1 adjective /ˌɪnəˈtɛntɪv/

inattentive

Meaning
not paying attention; lacking focus or concentration
Example
The inattentive student missed several important instructions.
C1 adjective ləˈθɑːrdʒɪk

lethargic

Meaning
Being inactive due to lack of physical or mental energy
Example
After a heavy meal, he felt lethargic and sleepy.
C1 noun /fɪˈnɑːleɪ/

finale

Meaning
the last part or conclusion of a performance, event, or series
Example
The concert ended with a spectacular finale.
C1 noun məˌtɪərɪəˈlɪstɪk ˈlaɪfstaɪl

materialistic lifestyle

Meaning
A way of living focused on acquiring material possessions and wealth.
Example
A materialistic lifestyle often leads to moral decline.
C1 verb /loʊð/

loathe

Meaning
to feel intense dislike or disgust for
Example
He absolutely loathes being late to meetings.
C1 verb /dɪˈstɪl/

distill

Meaning
To purify a liquid by heating and cooling; to extract the essential meaning or most important aspects.
Example
The factory distills water to make it safe for drinking.
C1 noun /ˌdʒʊə.rɪsˈdɪk.ʃən/

Jurisdiction

Meaning
the official power to make legal decisions and judgments; the extent of this power
Example
This case falls under the jurisdiction of the federal court.
C1 noun /daɪˈvɜː.ʃən/

Diversion

Meaning
the action of turning something aside from its course; an activity that diverts the mind
Example
The road closure forced a diversion through the countryside for all travelers.
C1 verb /ˈkrɒs.briːd/

crossbreed

Meaning
to produce an animal or plant by mating two different breeds, varieties, or species
Example
Farmers crossbreed cows to improve milk production.
C1 verb /ˈmedɪkeɪt/

medicate

Meaning
to treat with medicine; to give drugs to someone for medical purposes
Example
The doctor will medicate the patient to reduce inflammation.
C1 noun /kæsˈkeɪd/

Cascade

Meaning
a waterfall; a succession of stages or operations
Example
The mountain cascade created a beautiful natural swimming pool below.
C1 noun /ˈtres.pæs.ər/

Trespasser

Meaning
a person who enters someone's property without permission
Example
The security guard caught the trespasser climbing over the fence.
C1 verb /priːˈɛmpt/

pre-empt

Meaning
to act in advance to prevent an anticipated event from happening; forestall
Example
The government moved to pre-empt a crisis by introducing new policies.
C1 adjective /ˈkɒn.ɪ.fər.əs/

coniferous

Meaning
Relating to cone-bearing trees that usually have needle-like leaves and remain green year-round.
Example
Pine trees are coniferous and grow in colder climates.
C1 adjective /oʊˈbiːs/

obese

Meaning
Extremely overweight; having an excessive amount of body fat.
Example
The doctor advised the obese patient to adopt a healthier lifestyle.
C1 noun /ˈpəʊstˌskrɪpt/

postscript

Meaning
an additional remark at the end of a letter or text, after the signature
Example
She added a brief postscript to thank him again.
C1 adjective /səˈtɪrɪk/

satiric

Meaning
Relating to or using satire.
Example
The novel takes a satiric view of urban life.
C1 noun/verb /rɪˈpriːz/

reprise

Meaning
A repetition or return to an earlier theme, role, or action.
Example
The actor reprised his role in the sequel.
C1 noun, verb /ˈfrænʧaɪz/

franchise

Meaning
A legal right to sell or distribute goods or services in a specific area; to grant such a right.
Example
He opened a new fast-food franchise in the city.
C1 adjective /ləˈbɔːr.i.əs/

laborious

Meaning
requiring considerable effort and time; difficult and hard-working
Example
Writing the long report was a laborious task.
C1 noun ˌflʌk.tʃuˈeɪ.ʃən

fluctuation

Meaning
An irregular rising and falling in number or amount; a variation.
Example
The stock market experiences frequent fluctuation.
C1 noun /ˈnaɪt.fɔːl/

nightfall

Meaning
the time when night begins; dusk
Example
They decided to return home before nightfall.
C1 adjective /dʒuːˈdɪʃ.əl/

judicial

Meaning
relating to judges, courts, or the administration of justice
Example
The new law faced strong judicial review before implementation.
C1 adjective /ɪˈleɪtɪd/

elated

Meaning
Extremely happy and excited.
Example
She was elated when she heard the good news.
C1 verb /aʊtˈwɪt/

outwit

Meaning
to defeat or gain an advantage over someone by being more clever or cunning
Example
The fox managed to outwit the hunters.
C1 adjective /ˌʌnˈɪntɪmeɪtɪŋ/

unintimating

Meaning
Not giving a hint or suggestion; not indicating.
Example
His unintimating tone gave no clue of his true feelings.
C1 adjective /ˈsɛn.sər.i/

sensory

Meaning
Related to the five human senses (sight, hearing, taste, touch, smell).
Example
Sensory feedback enhances the VR experience.
C1 adjective rɪˈlɛntləs

relentless

Meaning
Oppressively constant; incessant; showing no abatement of severity, intensity, strength, or pace.
Example
The freedom fighters' relentless struggle led to victory.
C1 noun /woʊz/

woes

Meaning
great sorrow or distress; troubles
Example
The company faced financial woes after the market crash.
C1 verb ɪˈluː.sɪ.deɪt

elucidate

Meaning
make (something) clear; explain.
Example
The professor elucidated the theory with simple examples.
C1 noun ˈiː.pɒk

epoch

Meaning
A period of time in history or a person's life, typically one marked by notable events or particular characteristics.
Example
The invention of the internet marked a new epoch in human history.
C1 verb /ˈnʌlɪfaɪ/

nullify

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

pulsate

Meaning
to expand and contract rhythmically; to throb or beat
Example
The neon lights pulsated with a steady rhythm.
C1 adjective /ˈrʌɡ.ɪd/

Rugged

Meaning
rough and uneven; having a rough irregular surface; tough and strong
Example
The hikers crossed the rugged mountain terrain.
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 noun dɪˈtɜː.mɪ.nənt

determinant

Meaning
A factor that decisively affects the nature or outcome of something.
Example
Education is a key determinant of success.
C1 noun ˌes.kəˈleɪ.ʃən

escalation

Meaning
A rapid increase; a rise.
Example
The escalation of production costs impacts profitability.
C1 verb ˈplʌmɪtɪŋ

plummeting

Meaning
Falling or dropping suddenly and steeply; decreasing rapidly
Example
The fertility rate in Bangladesh is plummeting.
C1 noun /fɪkˈseɪ.ʃən/

fixation

Meaning
An obsessive interest in or feeling about someone or something.
Example
His fixation on perfectionism delayed project completion.
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 adjective /ˈneɡ.lɪ.dʒə.bəl/

Negligible

Meaning
so small or unimportant as to be not worth considering; insignificant
Example
The side effects of this medicine are negligible.
C1 noun /ˈpæŋkriəs/

pancreas

Meaning
A gland in the abdomen that produces insulin and digestive enzymes.
Example
The pancreas plays a vital role in digestion and blood sugar regulation.
C1 verb /pɜːrdʒ/

purge

Meaning
To remove unwanted feelings, people, or things; to cleanse or purify.
Example
The new leader promised to purge corruption from the government.
C1 noun /ˈdɛspɒt/

despot

Meaning
a ruler with absolute power, often ruling in a cruel or oppressive way
Example
The despot ruled the nation with fear and violence.
C1 verb /ɪmˈpɒvərɪʃ/

impoverish

Meaning
To make someone poor or reduce the quality or richness of something.
Example
The long war impoverished the entire nation.
C1 noun /læʃ/

Lash

Meaning
an eyelash; a sharp blow with a whip or rope; to strike forcefully
Example
She carefully applied mascara to make her lashes look longer and darker.
C1 verb /ˌæprɪˈhɛnd/

apprehend

Meaning
to arrest or seize someone; to understand or perceive something
Example
The police managed to apprehend the thief after a long chase.
C1 adjective ˌmæk.roʊ.iː.kəˈnɒm.ɪk

macroeconomic

Meaning
Relating to the large-scale or general economic factors, such as interest rates and national productivity.
Example
Government policies impact macroeconomic stability.
C1 verb /ˌʌndərˈvæljuː/

undervalue

Meaning
To assign too low a value or importance to something or someone.
Example
She felt that her boss consistently undervalued her contributions.
C1 verb /ˈdæŋɡəl/

dangle

Meaning
to hang loosely or swing freely
Example
The keys dangled from his belt.
C1 noun ˌɒk.sɪˈdeɪ.ʃən

oxidation

Meaning
A chemical reaction that involves the combination of a substance with oxygen, often causing deterioration.
Example
Oxidation causes metal surfaces to weaken.
C1 noun/adjective /ɪˈliːtɪst/

elitist

Meaning
A person who believes that a society should be led by an elite; showing preference for a privileged class.
Example
His elitist attitude made him unpopular among his peers.
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 /poʊˈɛt.ɪks/

poetics

Meaning
the study or theory of poetry and its principles
Example
He wrote a book on poetics explaining the art of verse.
C1 adjective /ˈpjuː.nɪ.tɪv/

punitive

Meaning
Inflicting or intended as punishment.
Example
The company faced punitive measures for violating the law.
C1 noun /ˈpraɪ.meɪt/

primate

Meaning
A member of the group of animals including humans, apes, and monkeys.
Example
Humans are classified as primates.
C1 verb /ˈpleɪdʒəraɪz/

plagiarize

Meaning
to take someone else's work or ideas and present them as your own
Example
He was warned not to plagiarize his friend's essay.
C1 noun /ˈtʌɡboʊt/

tugboat

Meaning
a small, powerful boat used for towing or pushing ships
Example
The tugboat guided the massive ship safely into the harbor.
C1 noun /ˈliːniənsi/

leniency

Meaning
The quality of being more merciful or tolerant than expected.
Example
The judge showed leniency in his ruling.
C1 adjective /ɪnˈstrʌktɪv/

instructive

Meaning
useful and informative; providing knowledge or instruction
Example
The lecture was highly instructive and engaging.
C1 noun /ˌɑːr.kəˈpɛl.əˌɡoʊ/

archipelago

Meaning
A group of islands clustered together in a body of water.
Example
Indonesia is an archipelago with thousands of islands.
C1 adjective /dɪˈraɪsɪv/

derisive

Meaning
Expressing contempt or ridicule.
Example
She gave a derisive laugh at his attempt to sing.
C1 adjective /ˈlæk.tɪk/

lactic

Meaning
Relating to milk or lactic acid.
Example
Intense exercise can lead to a buildup of lactic acid in the muscles.
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 verb /ˌɪntəˈsɛkt/

intersect

Meaning
to cross or pass through each other
Example
The two roads intersect at the city center.
C1 adjective /ˌʌnɪmˈplɔɪəbəl/

unemployable

Meaning
Not able to be employed; lacking the skills or qualities necessary for employment
Example
Due to his criminal record, he was considered unemployable in most companies.
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 /ˈɪn.trə.vɜːrt/

introvert

Meaning
A person who tends to be shy and prefers spending time alone rather than in groups.
Example
As an introvert, he preferred reading over attending parties.
C1 adjective /ˌwɛl tə ˈduː/

well-to-do

Meaning
Prosperous, wealthy, or financially comfortable.
Example
They belong to a well-to-do family in the city.
C1 noun ˈrɛp.ə.twɑːr

repertoire

Meaning
A stock of plays, dances, or pieces that a company or a performer knows or is prepared to perform.
Example
The actor's repertoire includes both comedy and drama.
C1 adjective পারসিভেবল

perceivable

Meaning
Able to be seen, noticed, or detected.
Example
The changes in winter weather are perceivable in rural areas.
C1 noun dɪˌzɝː.t̬ə.fɪˈkeɪ.ʃən

desertification

Meaning
The process by which fertile land becomes desert, typically as a result of drought, deforestation, or inappropriate agriculture.
Example
Deforestation accelerates desertification.
C1 adjective /kənˈspɪkjuəs/

conspicuous

Meaning
Easily noticeable; attracting attention due to being unusual or prominent.
Example
Her red dress made her conspicuous at the party.
C1 noun /ˈprɒv.ɜːb/

Proverb

Meaning
a short saying that expresses a general truth or gives advice
Example
The proverb 'Early to bed, early to rise' teaches us about good habits.
C1 noun /rɪˈdʒɪdəti/

Rigidity

Meaning
inability to bend or be forced out of shape; unwillingness to change or compromise
Example
The rigidity of the old system prevented any innovation.
C1 noun /ˈɜːr.θən pɒt/

Earthen pot

Meaning
a container made of baked clay or earth, used for cooking or storing
Example
The earthen pot keeps water naturally cool in summer.
C1 noun /ˈmæksɪm/

maxim

Meaning
a short, well-known statement expressing a general truth or rule of conduct
Example
Honesty is a timeless maxim valued in every culture.
C1 adjective /ˌʌnəkˈnɒlɪdʒd/

unacknowledged

Meaning
Not recognized, admitted, or accepted; ignored or unnoticed
Example
Her contributions to the project went unacknowledged.
C1 phrase ˈiː.kəʊˌsɪs.təm kəˈlæps

ecosystem collapse

Meaning
The complete breakdown of an ecological system, resulting in the inability to maintain its structure and function.
Example
Unchecked deforestation can lead to ecosystem collapse.
C1 adjective /ˈsliːzi/

sleazy

Meaning
morally low, dirty, or cheap in quality
Example
He avoided the sleazy nightclub downtown.
C1 adjective ˌɪdiəsɪnˈkrætɪk

idiosyncratic

Meaning
Relating to idiosyncrasy; peculiar or individual.
Example
His idiosyncratic behavior set him apart from his colleagues.
C1 adjective /ˈɛm.ɪ.nənt/

eminent

Meaning
Famous and respected within a particular sphere or profession.
Example
He is an eminent scientist known for groundbreaking research.
C1 adjective /dɪsˈpæʃənət/

dispassionate

Meaning
not influenced by strong emotion; impartial
Example
The judge remained dispassionate throughout the trial.
C1 verb /dɛlv/

delve

Meaning
To investigate deeply; to dig into a subject or area.
Example
The researcher delved into ancient manuscripts to find clues.
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 adjective /məˈdʒen.tə/

Magenta

Meaning
a bright purplish-red color
Example
She wore a beautiful magenta dress to the party.
C1 noun /ˈstæl.i.ən/

stallion

Meaning
An adult male horse that is not castrated, often used for breeding.
Example
The farm owns a powerful stallion for breeding purposes.
C1 noun /ˈkoʊtʃ.mən/

Coachman

Meaning
a person who drives a horse-drawn carriage or coach
Example
The coachman skillfully guided the horses through the busy streets.
C1 noun /ˈfoʊk.lɔːr/

folk-lore

Meaning
The traditional beliefs, customs, stories, songs, and practices of a community, passed down through generations.
Example
Bangladeshi folk-lore is rich with myths and legends.
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 noun /nɪl/

Nil

Meaning
nothing; zero; no amount
Example
His chances of winning were nil after the scandal.
C1 adjective /ˈmuː.və.bl̩/

Movable

Meaning
capable of being moved; not fixed in position
Example
The furniture is movable so we can rearrange the room easily.
C1 adjective /pərˈpetʃuəl/

perpetual

Meaning
never-ending or continuous
Example
She lived in perpetual fear of being discovered.
C1 adjective /ˈskrɔːni/

scrawny

Meaning
very thin and bony, often looking unhealthy
Example
The scrawny boy could barely lift the heavy bag.
C1 adjective /ˈfɜːr.vənt/

fervent

Meaning
having or showing intense passion or enthusiasm
Example
She gave a fervent speech about climate change.
C1 adjective /ˈdɪs.ə.plɪ.ner.i/

Disciplinary

Meaning
relating to discipline; intended to correct behavior
Example
The company took disciplinary action against the employee.
C1 noun /siˈɛrə klʌb/

Sierra Club

Meaning
An American environmental organization founded in 1892 by John Muir, focused on promoting conservation of the natural environment by influencing public policy decisions.
Example
John Muir founded the Sierra Club in 1892 to protect wild areas.
C1 adjective /ʌlˈtɪəriər/

ulterior

Meaning
hidden or secret, often with a selfish motive
Example
He invited her with an ulterior motive.
C1 adjective /bræʃ/

brash

Meaning
self-assertive in a rude, noisy, or overconfident way
Example
His brash comments offended many people at the meeting.
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 noun /ˈpleɪn.tɪf/

Plaintiff

Meaning
a person who brings a case against another in a court of law; the person who initiates a lawsuit
Example
The plaintiff filed a lawsuit against the company.
C1 adjective ˈriːdʒən spəˈsɪfɪk

region-specific

Meaning
Relating to or characteristic of a particular region or area.
Example
Climate change impacts are region-specific.
C1 adjective /dɪˈpreɪvd/

depraved

Meaning
morally corrupt or wicked
Example
The film depicts the life of a depraved criminal.
C1 noun /ˈɛf.ɪ.kə.si/

efficacy

Meaning
The ability to produce a desired or intended result; effectiveness.
Example
The efficacy of the vaccine has been proven in trials.
C1 noun /ˈdʒʌŋk.tʃər/

Juncture

Meaning
a particular point in events or time; a critical moment when important decisions must be made
Example
At this juncture, we need to make a crucial decision about our future.
C1 noun əˈɡrɛriən səˈsaɪətiz

agrarian societies

Meaning
Societies based on agriculture and farming as the primary economic activity.
Example
Agrarian societies emerged from a need for stable food sources.
C1 adjective /ˈplæsɪd/

placid

Meaning
calm and peaceful, not easily disturbed
Example
She had a placid expression despite the chaos around her.
C1 verb /ˈreɪdieɪt/

radiate

Meaning
to emit energy or light; to spread out from a center
Example
The fireplace radiates warmth throughout the room.
C1 noun /ˈprɒmɪnəns/

prominence

Meaning
The state of being important, famous, or easily noticed.
Example
Her work gained prominence after the award.
C1 noun ˌdɪdʒɪˈnɛəreɪʃən

degeneration

Meaning
The process of decline or deterioration in structure or function.
Example
The degeneration of brain cells leads to cognitive decline.
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 verb /skʌlpt/

sculpt

Meaning
to create or shape something by carving or molding
Example
The artist sculpted a beautiful statue from marble.
C1 verb /səbˈvɜːrt/

subvert

Meaning
to undermine or overthrow an established system, authority, or institution
Example
The rebels tried to subvert the government.
C1 adjective /ˌeɪsɪˈmɛtrɪkəl/

asymmetrical

Meaning
Having parts that are not the same in size, shape, or arrangement.
Example
She wore an asymmetrical dress that drew everyone’s attention.
C1 noun /bəˈnɛv.ə.ləns/

benevolence

Meaning
The quality of being well meaning and kindly; the disposition to do good.
Example
His benevolence towards the poor earned him respect.