Biosphere
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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 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 noun /ˈkruːsɪbəl/

crucible

Meaning
a severe test or trial; a container used for heating substances to very high temperatures
Example
The team emerged stronger from the crucible of competition.
C1 adjective ˌmɒn.jʊˈmɛn.təl

monumental

Meaning
Great in importance, extent, or size; exceptionally great; forming or serving as a monument.
Example
The discovery of electricity was a monumental achievement.
C1 noun /ˌpɜːsəˈnælɪzeɪʃən/

personalization

Meaning
The action of making something personal or individual; customization.
Example
Personalization in marketing improves customer engagement.
C1 noun /sɪˈtɑːr/

Sitar

Meaning
a traditional Indian stringed musical instrument with a long neck and resonating body
Example
The sitar creates beautiful ragas in Indian classical music.
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 verb /prɒd/

prod

Meaning
to poke or push someone or something with a finger, foot, or pointed object
Example
She prodded him in the arm to get his attention.
C1 adjective /ʌnˈkɛmpt/

unkempt

Meaning
Having an untidy or disheveled appearance.
Example
He looked unkempt after sleeping outdoors all night.
C1 verb /dɪˈzɪst/

desist

Meaning
to stop doing something, especially an action considered wrong or undesirable
Example
The judge ordered the company to desist from unfair practices.
C1 noun /ˌfæb.rɪˈkeɪ.ʃən/

fabrication

Meaning
The invention of false or misleading information; a lie or falsehood.
Example
The article was full of fabrication and misleading claims.
C1 noun /ˌdɪfəˈrɛnʃɪˈeɪʃən/

differentiation

Meaning
The action or process of differentiating or distinguishing between things.
Example
Differentiation from competitors can create a unique market position.
C1 adjective /kənˈtɛmptəbl/

contemptible

Meaning
deserving of contempt; despicable
Example
His deceitful actions were truly contemptible.
C1 noun /ˈrʌfiən/

Ruffian

Meaning
a violent person, especially one involved in crime; a brutal or lawless person
Example
The ruffian threatened the shopkeeper for money.
C1 verb /dɪˈpɔːrt/

deport

Meaning
To expel a foreigner from a country, usually for legal or political reasons.
Example
The government decided to deport the illegal immigrants.
C1 adjective, noun /ˈsɛlɪbət/

celibate

Meaning
abstaining from marriage and sexual relations; a person who does so
Example
He chose to remain celibate for religious reasons.
C1 noun prɪˈzɜː.və.tɪvz

preservatives

Meaning
A substance used to preserve foodstuffs, wood, or other materials against decay.
Example
Many processed foods contain harmful preservatives.
C1 verb /ˈviːtoʊ/

veto

Meaning
to reject or forbid a decision, proposal, or law
Example
The president decided to veto the new bill.
C1 noun /ˈdɛljuːdʒ/

deluge

Meaning
A severe flood; an overwhelming quantity of something.
Example
The town was hit by a deluge of rain in just a few hours.
C1 verb /ʌnˈɜːθ/

unearth

Meaning
To dig up from the ground or to discover something hidden.
Example
Archaeologists unearthed ancient artifacts at the site.
C1 verb /pləˈkeɪt/

placate

Meaning
to make someone less angry or hostile; to calm or soothe
Example
He tried to placate the angry customer with a refund.
C1 noun /ˈstætʃər/

stature

Meaning
A person's natural height or their reputation and importance.
Example
Her intellectual stature made her a respected figure in academia.
C1 verb /ˈstrætɪfaɪ/

stratify

Meaning
to arrange or divide into layers, classes, or categories
Example
The researchers plan to stratify the data based on age groups.
C1 noun /ˈrɪdəns/

riddance

Meaning
The action of getting rid of something unwanted or unpleasant.
Example
His departure was considered a welcome riddance by the team.
C1 verb /ˈnɔːrməlaɪz/

normalize

Meaning
to bring something back to a normal or standard condition; to make something conform to a standard
Example
The government took steps to normalize relations with neighboring countries.
C1 verb /ˈfɔːrfɪt/

forfeit

Meaning
to lose or give up something, usually as a penalty for wrongdoing
Example
He had to forfeit the match after breaking the rules.
C1 adjective /ɪmˈpɜːmiəbl/

impermeable

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

subversion

Meaning
the act of trying to destroy or undermine an established system or authority
Example
The government accused the rebels of planning subversion.
C1 noun prɪˈzɝː.və.tɪv

preservative

Meaning
A chemical substance that prevents decay, fermentation, or other natural processes that cause food deterioration.
Example
Artificial preservatives are harmful to health.
C1 noun /ˌmɒd.jʊˈleɪ.ʃən/

modulation

Meaning
The process of varying or controlling something.
Example
Proper modulation of voice enhances communication skills.
C1 noun /speɪt/

spate

Meaning
a large number of things occurring in quick succession
Example
There has been a spate of robberies in the city.
C1 noun ˌmek.ə.naɪˈzeɪ.ʃən

mechanization

Meaning
The process of introducing machines or replacing manual labor with machines.
Example
Mechanization has revolutionized agriculture.
C1 noun /ˈɒptɪks/

optics

Meaning
The branch of physics dealing with light and vision.
Example
She studied optics to understand how lenses work.
C1 verb /ˈɡlɒs.oʊ.vər/

glossover

Meaning
an informal or non-standard variant of 'gloss over', meaning to ignore or minimize something
Example
He tried to glossover his mistakes during the meeting.
C1 noun /ˈsɜːrəɡət/

surrogate

Meaning
A substitute, especially a person deputizing for another in a specific role or office.
Example
The surrogate mother gave birth to the child after carrying it for nine months.
C1 verb /ˈmɑːrʃəl/

marshal

Meaning
To arrange or organize people, events, or resources in an orderly way.
Example
The teacher marshaled the students for the field trip.
C1 noun /ˈkoʊmə/

coma

Meaning
A deep state of prolonged unconsciousness caused by illness or injury.
Example
The patient remained in a coma for several weeks.
C1 adverb /ˈfɪksɪdli/

Fixedly

Meaning
in a steady, unmoving manner; with intense concentration
Example
He stared fixedly at the painting.
C1 noun /ˈoʊvərˌtoʊn/

overtone

Meaning
A subtle quality, implication, or additional meaning beyond the obvious.
Example
His speech had political overtones that were hard to ignore.
C1 noun/verb /ˈtæm.pər.ɪŋ/

tampering

Meaning
The action of interfering with something in order to cause damage or make unauthorized alterations.
Example
Tampering with evidence is a criminal offense.
C1 noun /fɪlθ/

filth

Meaning
dirty or disgusting matter; moral corruption
Example
The streets were full of filth after the storm.
C1 adjective /əˈɡæst/

aghast

Meaning
filled with shock or horror
Example
The audience was aghast at the tragic scene.
C1 adjective /ˈseɪ.vər.i/

savory

Meaning
Having a pleasant salty or spicy taste; morally acceptable.
Example
The restaurant serves a variety of savory dishes.
C1 noun ˈiːkəʊˌsɪstəm ˈsɜːvɪsɪz

ecosystem services

Meaning
The benefits people obtain from ecosystems.
Example
Forests provide valuable ecosystem services, such as purifying air and water.
C1 adjective /ʌnˈʃeɪkən/

Unshaken

Meaning
not disturbed or affected; firm and steady; unwavering
Example
Her faith remained unshaken despite all the challenges.
C1 noun /brɒŋˈkaɪtɪs/

bronchitis

Meaning
inflammation of the lining of the bronchial tubes, which carry air to and from the lungs
Example
The doctor diagnosed him with acute bronchitis.
C1 phrase ˌbaɪ.oʊ.daɪˈvɜː.sɪ.ti ˌprez.əˈveɪ.ʃən

biodiversity preservation

Meaning
The protection and conservation of the variety of life in all its forms, including different species, genetic diversity, and ecosystems.
Example
Biodiversity preservation is critical for ecological balance.
C1 adjective /ˈfɜːr.vənt/

fervent

Meaning
having or showing intense passion or enthusiasm
Example
She gave a fervent speech about climate change.
C1 adjective /dɪˈstrɔːt/

distraught

Meaning
extremely upset and anxious, often to the point of being unable to think clearly
Example
She was distraught after losing her pet.
C1 noun /mjuːˈteɪʃn/

mutation

Meaning
A change in form, structure, or nature, especially in genetics.
Example
Scientists discovered a genetic mutation that caused the disorder.
C1 verb /bɒtʃ/

botch

Meaning
to carry out a task badly or carelessly
Example
He completely botched the repair job.
C1 noun /ˌʌnriˈælɪti/

unreality

Meaning
the state or quality of being unreal; lack of reality or truth
Example
The dreamlike setting gave the story a sense of unreality.
C1 adjective /ˈbuːzi/

boozy

Meaning
containing or involving a lot of alcohol; slightly drunk from alcohol
Example
The party became boozy as the night went on.
C1 noun /ˌænɛkˈseɪʃən/

annexation

Meaning
the act of adding or taking control of territory or property, especially by a state
Example
The annexation of the region led to international condemnation.
C1 verb /ɪnˈkæp.sjʊ.leɪt/

encapsulate

Meaning
To express the essential features of something succinctly; to summarize or contain within.
Example
The introduction should encapsulate the main points of the article.
C1 noun /maɪt/

mite

Meaning
a very small creature, often a tiny arachnid; also used to mean a very small amount
Example
The mattress was infested with dust mites.
C1 adjective /ˈbeɪs.ləs/

Baseless

Meaning
without foundation; groundless; unfounded
Example
The accusations against him were completely baseless.
C1 adjective /ˈɡrʌdʒɪŋ/

grudging

Meaning
Reluctant or unwilling; given or allowed only with hesitation.
Example
She gave him a grudging smile after the argument.
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 noun /ˈstaɪləs/

stylus

Meaning
a small tool used for writing, drawing, or touching screens
Example
She used a stylus to draw on her tablet.
C1 noun /ˈfɛlən/

felon

Meaning
a person who has committed a serious crime
Example
The felon was sentenced to ten years in prison.
C1 noun /ˈdeɪ.ə.ti/

deity

Meaning
a god or goddess
Example
The temple is dedicated to a Hindu deity.
C1 verb /ˈbruːtəlaɪz/

brutalize

Meaning
to treat someone with extreme violence or cruelty; to make something harsh or cruel
Example
The regime was accused of brutalizing innocent civilians.
C1 adjective /ˌtræn.senˈdɛn.təl/

transcendental

Meaning
relating to the spiritual or non-physical realm; surpassing ordinary experience
Example
Meditation can lead to transcendental experiences.
C1 adjective /ˈpɔɪ.njənt/

poignant

Meaning
evoking a keen sense of sadness or regret; deeply touching
Example
The movie's ending was so poignant that many in the audience were moved to tears.
C1 noun /ˈkaʊn.tə.nəns/

countenance

Meaning
a person's face or expression; support or approval
Example
Her cheerful countenance brightened the room.
C1 noun /rɪˈfaɪnəri/

refinery

Meaning
an industrial facility where raw materials are processed and purified
Example
The oil refinery processes thousands of barrels daily.
C1 noun /krʌst/

crust

Meaning
the hard outer surface of something, especially bread or the Earth's outer layer
Example
He cut off the crust of the bread before eating.
C1 verb /trʌdʒ/

trudge

Meaning
To walk slowly and with heavy steps, typically because of exhaustion or harsh conditions.
Example
They had to trudge through the snow to reach the village.
C1 adjective /məˈlɛvələnt/

malevolent

Meaning
Having or showing a wish to do evil or harm to others.
Example
The malevolent glare in his eyes frightened the children.
C1 adjective ɪnˈdel.ə.bəl

indelible

Meaning
Making marks that cannot be removed; impossible to forget or remove.
Example
Her speech left an indelible mark on the audience.
C1 adjective /ˈʌpərˌmoʊst/

uppermost

Meaning
situated at the highest place or most important
Example
Her family's safety was uppermost in her mind during the crisis.
C1 adjective /kəˈnɒnɪkəl/

canonical

Meaning
Conforming to a general rule or accepted standard; officially recognized.
Example
Shakespeare’s works are considered canonical in English literature.
C1 adjective /ˌɪnɑːrˈtɪkjʊlət/

inarticulate

Meaning
Unable to express oneself clearly or effectively in speech or writing.
Example
She became inarticulate with emotion during the speech.
C1 adjective vəˈreɪ.ʃəs

voracious

Meaning
Having a very eager approach to an activity; wanting or devouring great quantities of food or having an insatiable appetite.
Example
He has a voracious appetite for knowledge.
C1 noun /ˈroʊ.lɪŋ bɔːrd/

Rolling board

Meaning
a flat wooden or marble surface used for rolling out dough
Example
She placed the dough on the rolling board.
C1 noun /straɪf/

strife

Meaning
angry or violent conflict; struggle or discord
Example
The region has been torn apart by political strife.
C1 adjective /ˈpɒlɪtɪk/

politic

Meaning
shrewd, prudent, or tactful in practical matters
Example
It was politic of him to remain silent during the argument.
C1 adjective draʊt rɪˈzɪs.tənt

drought-resistant

Meaning
Able to survive and grow despite limited water availability or drought conditions.
Example
Drought-resistant crops can survive in arid conditions.
C1 verb ɪɡˈzæsərbeɪt

exacerbate

Meaning
To make a problem, bad situation, or negative feeling worse.
Example
Climate change exacerbates flooding issues.
C1 verb /ˈkæptɪveɪt/

captivate

Meaning
to attract and hold the interest of; to charm or fascinate
Example
Her beautiful voice captivated the audience.
C1 noun /θiˈɒlədʒi/

theology

Meaning
The study of the nature of God and religious beliefs.
Example
She is pursuing a degree in theology at the university.
C1 noun /ˌdɪs.ɪˈluː.ʒən.mənt/

disillusionment

Meaning
A feeling of disappointment resulting from the discovery that something is not as good as one believed it to be.
Example
Many people experience disillusionment after unrealistic expectations.
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 /ˈdʒɜːrmɪneɪt/

germinate

Meaning
To begin to grow or develop, especially referring to a seed.
Example
The seeds germinate quickly in moist soil.
C1 adjective /ˈhæb.ɪ.tə.bəl/

Habitable

Meaning
suitable or good enough to live in
Example
The planet Mars may become habitable in the future.
C1 noun /rɪˈmɪʃən/

remission

Meaning
A temporary or permanent decrease or disappearance of disease symptoms; forgiveness of sins or debts.
Example
The patient’s cancer is in remission after the treatment.
C1 adjective /ˈlɔː.də.bəl/

laudable

Meaning
Deserving praise and admiration.
Example
Her efforts to help the poor are truly laudable.
C1 noun /ˈʌndərˌstʌdi/

understudy

Meaning
An actor who learns another's role to act as a replacement if needed.
Example
The understudy performed when the lead actor fell ill.
C1 noun /ˌprəʊ.baɪˈɒt.ɪks/

probiotics

Meaning
Live microorganisms that, when administered in adequate amounts, confer health benefits to the host, especially for digestive health.
Example
Probiotics improve digestion and enhance gut health.
C1 noun /ˈvɛriəns/

variance

Meaning
the state of being different or inconsistent; in statistics, a measure of the spread between numbers
Example
There is a wide variance in students' performance levels.
C1 adjective dɪ ˈskrɛʃ.ən.er.i

discretionary

Meaning
Available for use at the discretion of the user; not required or mandatory.
Example
He set aside some discretionary income for travel.
C1 adjective /əˌpɒk.əˈlɪp.tɪk/

apocalyptic

Meaning
Describing the end of the world, or something catastrophic and disastrous.
Example
The movie depicts an apocalyptic future after a nuclear war.
C1 noun /prəˈpɛlənt/

propellant

Meaning
A substance that drives or pushes something forward, especially fuel in rockets or engines.
Example
The rocket uses a liquid propellant to launch into space.
C1 noun /ˌdʒʌkstəpəˈzɪʃən/

juxtaposition

Meaning
The fact of two things being seen or placed close together with contrasting effect.
Example
The juxtaposition of light and dark colors created a dramatic effect.
C1 noun /ɪmˈpɜː.mə.nəns/

impermanence

Meaning
The state or fact of lasting for only a limited period of time.
Example
The philosophy of Buddhism emphasizes the impermanence of life.
C1 adjective /ˌɪrɪˈspɛktɪv/

Irrespective

Meaning
without taking something into account; regardless of
Example
All students will be treated equally, irrespective of their background.
C1 noun /ˌprɒk.ləˈmeɪ.ʃən/

Proclamation

Meaning
an official public announcement, especially one made by someone in authority
Example
The king issued a proclamation declaring peace.
C1 adjective /ˈskɪtɪʃ/

skittish

Meaning
easily frightened or nervous; unpredictable
Example
The horse was too skittish to ride.
C1 adjective /ɪɡˈzɔːstɪv/

exhaustive

Meaning
Fully comprehensive and including all possibilities.
Example
The report provides an exhaustive analysis of the issue.
C1 noun /səbˈmɜːrdʒəns/

submergence

Meaning
the act or process of being submerged or going underwater
Example
The submergence of coastal areas is a major concern due to rising sea levels.
C1 verb /ˈkætəˌlaɪz/

catalyze

Meaning
To cause or accelerate a reaction or change.
Example
The new law catalyzed reforms across the sector.
C1 verb /ˈstaɪmi/

stymie

Meaning
to prevent or hinder the progress of something
Example
The new regulations could stymie small businesses.
C1 adjective /dɪsˈrɛpjətəbl̩/

disreputable

Meaning
having a bad reputation; not considered respectable or trustworthy
Example
The journalist avoided staying in the disreputable part of town.
C1 adjective /ˈdjuːtɪfəl/

Dutiful

Meaning
conscientiously fulfilling one's duty; obedient; respectful
Example
She is a dutiful daughter who always helps her parents.
C1 verb /ˈnɛsəl/

nestle

Meaning
to settle or lie comfortably within or against something
Example
The child nestled into her mother's arms.
C1 verb /ˌaʊtˈstrɛtʃ/

outstretch

Meaning
To extend or stretch something outward.
Example
He outstretched his hand to help her up.
C1 noun ˈprəʊses stəˈbɪlɪti

process stability

Meaning
The consistency and steadiness of biological or functional processes
Example
Cold air ensures process stability in plants.
C1 noun ɪnˈdʌldʒəns

indulgence

Meaning
The practice of allowing oneself to enjoy the pleasure of something.
Example
His indulgence in junk food affected his health.
C1 noun/verb /brʊk/

brook

Meaning
As a noun: a small natural stream; As a verb: to tolerate or endure something
Example
The village was built near a clear brook.
C1 noun proʊˈæktɪv ˈseɪvɪŋ

proactive saving

Meaning
Actively planning and setting aside money in advance to prepare for future financial needs
Example
Proactive saving ensures financial stability in old age.
C1 adjective /ˈbed.rɪd.ən/

Bedridden

Meaning
confined to bed; unable to leave one's bed due to illness or infirmity
Example
The elderly man has been bedridden for several months.
C1 verb /ˈtɪŋkər/

tinker

Meaning
to make small adjustments or repairs to something, often experimentally or imperfectly
Example
He likes to tinker with old radios in his garage.
C1 noun /djʊˈrɛs/

duress

Meaning
threats, violence, or pressure used to force someone to do something
Example
She signed the contract under duress.
C1 noun /dɪsˈɪntrəst/

disinterest

Meaning
lack of interest or concern
Example
His disinterest in the project was obvious.
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 adjective /ˈɜːrθi/

earthy

Meaning
resembling or suggestive of earth or soil; simple, natural, and sometimes coarse
Example
The dish had a rich, earthy flavor from the mushrooms.
C1 verb /ˈlɪkwɪdeɪt/

liquidate

Meaning
To sell assets in order to pay off debts; to close a business and convert assets into cash.
Example
The company decided to liquidate its assets to pay creditors.
C1 adjective /ˈpɪt.i.ə.bəl/

pitiable

Meaning
deserving sympathy or compassion
Example
The stray dog looked pitiable in the rain.
C1 noun /ˈniːdəlwɜːrk/

needlework

Meaning
The craft of sewing, embroidery, or knitting done with a needle.
Example
Her grandmother taught her the art of needlework.
C1 noun /ˈkwɒn.dər.i/

Quandary

Meaning
a difficult situation where you cannot decide what to do; dilemma
Example
She was in a quandary about which job offer to accept.