sterile
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C1 adjective /ˈstɛr.aɪl/

sterile

Meaning
Free from bacteria or other living microorganisms; incapable of producing offspring.
Example
The surgeon worked in a sterile environment to avoid infection.
C1 verb /ˈstaɪfəld/

stifled

Meaning
to suppress, hold back, or prevent something from happening
Example
He stifled a laugh during the serious meeting.
C1 adjective /pəˈdæntɪk/

pedantic

Meaning
Excessively concerned with minor details or rules; overly academic or bookish.
Example
Her pedantic explanations made the lecture dull.
C1 noun /əˈflɪkʃən/

affliction

Meaning
a state of pain, suffering, or distress
Example
Poverty is a common affliction in many parts of the world.
C1 adjective /ˈwɪl.fəl/

Wilful

Meaning
deliberately stubborn; done on purpose; intentional
Example
His wilful disobedience led to punishment.
C1 verb /iːk/

eke

Meaning
to make a small amount of something last longer by using it sparingly
Example
The family tried to eke out their savings during the tough months.
C1 adjective /ɪnˈflɛksəbl/

inflexible

Meaning
Not able to bend or change; unwilling to change ideas or behavior.
Example
His inflexible attitude made negotiations difficult.
C1 noun /ˈmʌs.tərd siːdz/

Mustard seeds

Meaning
small round seeds from the mustard plant, used as a spice and for making mustard condiment
Example
Mustard seeds are often tempered in hot oil to release their nutty flavor before adding to dishes.
C1 adjective /fərˈlɔːrn/

forlorn

Meaning
extremely sad, lonely, or abandoned
Example
The abandoned puppy looked so forlorn in the rain.
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 adjective /ˈpjuːtrɪd/

putrid

Meaning
decayed and emitting a foul smell
Example
The garbage smelled putrid after days in the sun.
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.
C1 noun /ˈtruː.ənt/

Truant

Meaning
a student who stays away from school without permission; a person who shirks duty
Example
The principal called the parents when their child was caught playing truant.
C1 noun /ˌrɛmɪˈnɪsəns/

reminiscence

Meaning
a story or memory about past events
Example
He shared a reminiscence of his childhood days in the village.
C1 adjective /fəˈnɛtɪk/

phonetic

Meaning
relating to the sounds of speech or pronunciation
Example
The teacher taught the students the phonetic spelling of difficult words.
C1 noun /ˈprɛljuːd/

prelude

Meaning
An action, event, or statement that serves as an introduction to something more important.
Example
The small fight was only a prelude to a bigger conflict.
C1 noun /ɪnˈdɪrmənt/

endearment

Meaning
A word or phrase expressing affection or love.
Example
She whispered a gentle endearment to her child.
C1 noun /deɪˈbɑː.kəl/

debacle

Meaning
A sudden and ignominious failure; a fiasco.
Example
The company's poor management led to a financial debacle.
C1 verb /ˈpɛtrɪfaɪ/

petrify

Meaning
to make someone so frightened that they are unable to move or think; to turn into stone
Example
The loud noise petrified the little child.
C1 adjective ˈɒb.stɪ.nət

obstinate

Meaning
Refusing to change one's mind or accept others' advice easily.
Example
He remained obstinate despite the logical arguments.
C1 noun /məˈtɪəriəlɪzəm/

Materialism

Meaning
A tendency to consider material possessions more important than spiritual values
Example
The rise of materialism in modern society concerns many philosophers.
C1 noun /ɪˌlæbəˈreɪʃən/

elaboration

Meaning
the process of adding more detail or expanding on something
Example
The teacher appreciated the student's elaboration of the topic.
C1 adjective /əˈprɛs.ɪv/

Oppressive

Meaning
Harsh and authoritarian; overwhelming; causing distress; tyrannical;
Example
The oppressive heat made it difficult to work outside during the summer.
C1 adjective /ˈpjuː.ni/

puny

Meaning
Small, weak, or insignificant.
Example
He felt puny compared to his stronger classmates.
C1 noun /əˈfen.dər/

Offender

Meaning
a person who commits an illegal act; someone who breaks the law
Example
The young offender was sentenced to community service.
C1 adjective /mɪˈrækjələs/

Miraculous

Meaning
supernatural; amazing; extraordinary
Example
Her miraculous recovery amazed all the doctors.
C1 adjective /ˈsted.fæst/

Steadfast

Meaning
firm in belief, determination, or adherence; unwavering
Example
She remained steadfast in her commitment to helping the poor.
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 noun /ɡruːv/

groove

Meaning
a long narrow cut or depression, or a rhythmic pattern in music
Example
The DJ kept the crowd dancing to the groove.
C1 noun/adjective /ˈbaɪ.ɡɒn/

bygone

Meaning
Something belonging to an earlier time; past and no longer existing.
Example
He often talks about the traditions of bygone days.
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 noun /ˈfɔːrmən/

foreman

Meaning
a person in charge of a group of workers, especially in a factory or construction site
Example
The foreman supervised the workers on the construction site.
C1 noun /ˌrætɪfɪˈkeɪʃən/

Ratification

Meaning
the action of signing or giving formal consent to a treaty, contract, or agreement
Example
The treaty required ratification by both countries' parliaments.
C1 noun /stɪˈlɛtoʊ/

stiletto

Meaning
A small, thin, high-heeled shoe or a dagger with a slender blade.
Example
She wore elegant stiletto heels to the party.
C1 adjective ɔːɡˈmen.tɪd

augmented

Meaning
having been made greater in size or value.
Example
The new software provided augmented reality features.
C1 adjective /læks/

lax

Meaning
Not strict, severe, or careful; negligent or careless.
Example
The security at the airport was surprisingly lax.
C1 noun /ˈklɛmənsi/

clemency

Meaning
mercy, leniency, or forgiveness shown towards someone
Example
The judge showed clemency and reduced his sentence.
C1 noun /ˈtriːtɪs/

treatise

Meaning
a formal and systematic written work dealing with a subject in detail
Example
He wrote a treatise on modern economic theory.
C1 adjective /ˈrænsɪd/

rancid

Meaning
having a bad taste or smell due to being old or spoiled (especially fats or oils)
Example
The butter had gone rancid after being left out too long.
C1 verb /ˈpɑːzɪt/

posit

Meaning
To assume or suggest something as a fact or basis for reasoning.
Example
The scientist posited a new theory to explain the phenomenon.
C1 verb /hjuːˈmɪlieɪt/

humiliate

Meaning
to make someone feel ashamed or foolish by injuring their dignity
Example
He was humiliated by his public failure.
C1 verb /səbˈstænʃieɪt/

substantiate

Meaning
To provide evidence to support or prove the truth of something.
Example
The lawyer worked to substantiate the claims with solid evidence.
C1 verb /ˈpɒstʃʊleɪt/

postulate

Meaning
to suggest or assume that something is true as the basis for reasoning or discussion
Example
Scientists postulate that life exists on other planets.
C1 adjective /ˈɒm.ɪ.nəs/

Ominous

Meaning
giving the impression that something bad will happen; threatening; foreboding
Example
The dark clouds looked ominous before the storm.
C1 noun /ˌsæbəˈtɜːr/

saboteur

Meaning
A person who engages in sabotage.
Example
The saboteur was arrested before he could plant the bomb.
C1 adverb spɒnˈteɪnɪəsli

spontaneously

Meaning
In a spontaneous way; naturally and without planning or external cause.
Example
Children learn spontaneously through peer interactions.
C1 noun/verb /ɡrʌdʒ/

grudge

Meaning
A persistent feeling of ill will or resentment from a past insult or injury.
Example
She still holds a grudge against him for what happened years ago.
C1 verb /siːp/

seep

Meaning
to flow or leak slowly through small openings or pores
Example
Water began to seep through the cracks in the wall.
C1 adverb/adjective /vɜːˈbeɪ.tɪm/

verbatim

Meaning
In exactly the same words as were used originally; word for word repetition.
Example
She repeated his instructions verbatim to avoid errors.
C1 noun /pəˈrɪm.ɪ.tər/

perimeter

Meaning
the continuous line forming the boundary of a closed geometric figure or area
Example
The soldiers guarded the perimeter of the camp.
C1 verb /ɪɡˈzɒnəreɪt/

exonerate

Meaning
To clear someone from blame or accusation.
Example
The court exonerated her from all charges.
C1 adjective ˌɪm.pəˈsɛp.tɪ.bəl

imperceptible

Meaning
So subtle or gradual that it is difficult to notice or perceive
Example
The changes in his behavior were imperceptible at first.
C1 noun səbˈsɪs.təns

subsistence

Meaning
The action or fact of maintaining or supporting oneself at a minimum level.
Example
Many farmers depend on subsistence agriculture.
C1 adjective /ˈsʌbstəntɪv/

substantive

Meaning
Having a firm basis in reality; important, meaningful, or considerable.
Example
The company made substantive changes to its policy.
C1 noun məˈriːn ˈsɜː.veɪ

marine survey

Meaning
A systematic examination of the sea, seabed, and underwater features for the purpose of making maps or gathering other information.
Example
The marine survey identified the ideal cable routes.
C1 noun /rɪˈfɜːrər/

referrer

Meaning
a person who directs someone to another person or service
Example
The referrer earned a bonus for recommending a new client.
C1 noun ˈfɔː.saɪt

foresight

Meaning
The ability to predict or the action of predicting what will happen or be needed in the future.
Example
His foresight helped the company avoid financial losses.
C1 noun /ˈkæn.dɚ/

candor

Meaning
The quality of being open, honest, and straightforward in speech or expression.
Example
She spoke with candor about the challenges she faced.
C1 verb /ˈlaɪ.kən/

liken

Meaning
to compare one thing to another, often in a figurative way
Example
He likened her voice to sweet music.
C1 adjective /ˈkwɪzɪkəl/

quizzical

Meaning
Expressing mild or amused puzzlement.
Example
She gave him a quizzical look when he made the strange comment.
C1 noun ˌmɪtɪˈɡeɪʃən ˈstrætədʒiz

mitigation strategies

Meaning
Plans and actions designed to reduce the severity or impact of problems or risks.
Example
Governments must adopt mitigation strategies for climate change.
C1 adjective ˈɛl.ə.kwənt

eloquent

Meaning
Fluent or persuasive in speaking or writing; clearly expressing or indicating something.
Example
Her eloquent speech inspired the entire audience.
C1 verb /ˈʌndərkʌt/

undercut

Meaning
to sell at a lower price than a competitor; to weaken or undermine something
Example
The company tried to undercut its rivals by offering lower prices.
C1 noun /ˌbaɪˈlæt.ər.əl nɪˌɡəʊ.ʃiˈeɪ.ʃənz/

bilateral negotiations

Meaning
Negotiations or discussions between two parties, typically countries or organizations.
Example
Bilateral negotiations resolve disputes.
C1 adjective /ˈæŋ.ɡjə.lər/

Angular

Meaning
having sharp corners or edges; relating to angles
Example
The building has an angular design with sharp corners.
C1 adjective /ˈreɪdiənt/

radiant

Meaning
Shining brightly; expressing great happiness.
Example
She looked radiant in her wedding dress.
C1 noun /mɜːrθ/

mirth

Meaning
Great joy, amusement, or laughter.
Example
The festival was full of mirth and laughter.
C1 noun /ˈreɪ.biːz/

rabies

Meaning
A viral disease that causes inflammation of the brain in humans and other mammals, usually transmitted through animal bites.
Example
The dog was vaccinated against rabies.
C1 verb /bɪˈlɪtl/

belittle

Meaning
To make someone or something seem less important or less valuable.
Example
He often belittled his coworkers to feel superior.
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 verb /səbˈsɪst/

subsist

Meaning
To maintain or support oneself, especially at a minimal level.
Example
Many villagers still subsist on fishing and farming.
C1 noun ˈkeɪ.dəns

cadence

Meaning
The rhythm and flow of speech with rise and fall in tone.
Example
His speech had a natural cadence that captivated the audience.
C1 noun, verb /ˈmæn.deɪt/

mandate

Meaning
an official order or command; to give someone authority to act in a certain way
Example
The government issued a mandate to reduce carbon emissions.
C1 noun /ˈdrɪz.əl/

Drizzle

Meaning
light rain falling in very fine drops; a very light rainfall
Example
The gentle drizzle continued throughout the morning, making everything misty.
C1 adjective ˌɪn.təˈdɪs.ɪ.plɪ.nər.i

interdisciplinary

Meaning
Relating to more than one branch of knowledge.
Example
The interdisciplinary approach in education enhances problem-solving skills.
C1 verb /ɪnˈθrɔːl/

enthrall

Meaning
to captivate or hold someone’s attention completely
Example
The magician’s tricks enthralled the children.
C1 noun /ˈævətɑːr/

avatar

Meaning
an icon or figure representing a person in digital contexts; in Hinduism, a divine incarnation
Example
She changed her social media avatar to a new cartoon image.
C1 verb /ˈkæp.saɪz/

capsize

Meaning
to overturn in the water
Example
The small fishing boat capsized during the storm.
C1 adjective /ˈtɑːrdi/

tardy

Meaning
Delayed; arriving or happening late.
Example
The student received a warning for being tardy to class.
C1 verb /ˌkaʊntərˈækt/

counteract

Meaning
to act against something in order to reduce its effect
Example
The medicine helps counteract the side effects of the treatment.
C1 noun ˈrɔɪəl ˈbɛŋɡəl ˈtaɪɡər

Royal Bengal Tiger

Meaning
A subspecies of tiger found primarily in India and Bangladesh, known for its distinctive orange coat with black stripes.
Example
The Royal Bengal Tiger is an iconic species of the Sundarbans.
C1 noun /ˈɡreɪ.tər/

Grater

Meaning
a kitchen utensil with a rough surface for grating food into small pieces
Example
Use the grater to grate cheese for the pizza.
C1 verb /druːp/

droop

Meaning
to bend or hang downward; to become weak or tired
Example
The flowers began to droop in the heat.
C1 noun /ˈfʊtˌnoʊt/

foot-note

Meaning
A note of reference, explanation, or comment placed at the bottom of a page.
Example
The author included a foot-note to explain the historical context.
C1 noun /ˌkɒk.əˈtuː/

Cockatoo

Meaning
a large parrot with a prominent crest that can be raised or lowered
Example
The white cockatoo raised its beautiful crest.
C1 verb /ˈdʒepərdaɪz/

jeopardize

Meaning
to put something at risk of being damaged or destroyed
Example
His reckless behavior could jeopardize his career.
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 /ˈpɛdəstəl/

pedestal

Meaning
the base or support on which a statue or object stands
Example
The statue was placed on a marble pedestal.
C1 adverb /ˈðɛərfɔːr/

therefor

Meaning
For that or for it.
Example
He received payment and gave a receipt therefor.
C1 noun /ˈhaɪdəweɪ/

hideaway

Meaning
A place used as a retreat or a place to hide.
Example
The cabin in the woods was their secret hideaway.
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 noun /ˈɪŋklɪŋ/

inkling

Meaning
A slight idea, hint, or suspicion about something.
Example
She had an inkling that he was planning a surprise.
C1 adjective /ˌpæn.əˈræm.ɪk/

panoramic

Meaning
Giving a wide view of an extensive area in all directions.
Example
The hotel offers panoramic views of the ocean.
C1 noun ˈklaɪmət ˌrɛɡjʊˈleɪʃən

climate regulation

Meaning
The moderation of climate conditions through natural or artificial processes.
Example
Forests help in climate regulation by stabilizing local temperatures.
C1 noun /ˌsaɪkoʊˈθɛrəpi/

psychotherapy

Meaning
The treatment of mental disorder by psychological rather than medical means.
Example
She attended weekly psychotherapy sessions to cope with her anxiety.
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 /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 /ɪˈlæps/

elapse

Meaning
to pass or go by, usually referring to time
Example
Several hours elapsed before he finally returned home.
C1 verb /ˈræʃənaɪz/

rationlize

Meaning
to justify or explain something with logical reasons, even if not appropriate or true
Example
He tried to rationlize his mistake by blaming the system.
C1 adjective /ˈtɒp.məʊst/

Topmost

Meaning
highest in position or rank
Example
The flag was placed on the topmost branch of the tree.
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.
C1 adjective /ɪnˈseɪʃəbl̩/

insatiable

Meaning
impossible to satisfy; always wanting more
Example
Her insatiable curiosity drove her to read every book in the library.
C1 adverb /ˈhɛdˌlɔŋ/

headlong

Meaning
With the head leading; in a rush or without thinking.
Example
She rushed headlong into the new project.
C1 noun /ˌvaɪ.əˈbɪl.ə.ti/

viability

Meaning
Ability to work successfully; feasibility.
Example
The viability of the project depends on funding.
C1 verb /ɪnˈstɪl/

instill

Meaning
to gradually but firmly establish an idea, attitude, or habit in someone's mind
Example
Parents try to instill good values in their children.
C1 adverb /ˌðɛərˈɪn/

Therein

Meaning
in that place; in that respect
Example
The box contains many treasures, and therein lies its value.
C1 noun /pərˈkʌʃən/

percussion

Meaning
Musical instruments that are played by striking, shaking, or scraping, such as drums or cymbals.
Example
The percussion section added rhythm and energy to the orchestra.
C1 adjective /ˈædəmənt/

Adamant

Meaning
একগুঁয়ে; জেদী; দৃঢ়সংকল্প; অনমনীয়;
Example
She was adamant about her decision to leave the company.
C1 adjective /ɪˈnɒkjuəs/

innocuous

Meaning
Not harmful or offensive.
Example
His remark was completely innocuous and not meant to offend anyone.
C1 adjective /ˈrɛtɪsənt/

reticent

Meaning
not revealing one's thoughts or feelings readily; reserved
Example
She was reticent about her personal life.
C1 verb /dɪˈfeɪm/

defame

Meaning
to harm someone's reputation by spreading false information
Example
He was defamed by malicious rumors.
C1 noun /ˈmaɪzər/

miser

Meaning
A person who hoards wealth and spends as little money as possible.
Example
The old miser refused to donate even a penny to charity.
C1 adjective /rɪˈpʌl.sɪv/

Repulsive

Meaning
extremely unpleasant; causing strong dislike or disgust
Example
The smell of rotten eggs was absolutely repulsive.
C1 adverb /ˌðɛrəˈbaʊt/

thereabout

Meaning
Approximately or around that place, amount, or time.
Example
The repairs will cost five hundred dollars or thereabout.
C1 verb /wɔːrp/

warp

Meaning
To twist or bend out of shape, often due to heat or moisture.
Example
The wooden door warped in the summer heat.
C1 verb /ˈpærəlaɪz/

paralyze

Meaning
to cause someone or something to lose the ability to move or function normally
Example
The sudden shock seemed to paralyze him.
C1 noun /dɪˈmiːnər/

demeanor

Meaning
a person's outward behavior or appearance
Example
Her calm demeanor impressed everyone at the meeting.
C1 verb /ˈblækən/

blacken

Meaning
to make something black or darker; to stain, soil, or tarnish
Example
Smoke from the fire began to blacken the walls.
C1 noun /hɪm/

hymn

Meaning
A religious song or poem of praise to God or a deity.
Example
The congregation sang a hymn during the morning service.
C1 verb /kənˈviːn/

convene

Meaning
to come together or assemble, especially for a meeting or formal gathering
Example
The board will convene tomorrow to discuss the new policy.
C1 verb /ɪmˈpɪndʒ/

impinge

Meaning
to have an effect or impact on something; to encroach or infringe
Example
The noise from the construction site impinges on our daily activities.