corrode
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C1 verb /kəˈrəʊd/

corrode

Meaning
to gradually destroy or wear away metal or other materials through chemical action
Example
The iron pipes corroded over time due to exposure to water.
C2 adjective /ˈdɛdˌpæn/

deadpan

Meaning
Deliberately impassive or expressionless in manner.
Example
She delivered the joke in a completely deadpan voice.
C1 verb sɪˈkwɛstər

sequester

Meaning
To isolate or hide away.
Example
The carbon captured by trees can be sequestered for years.
C1 noun kənˈfɔː.mə.ti

conformity

Meaning
Compliance with standards, rules, or laws. Behavior in accordance with socially accepted conventions.
Example
Strict conformity to the rules ensures order in society.
A1 noun /ˈdʒænjuˌɛri/

january

Meaning
the first month of the year in the Gregorian calendar
Example
January is often the coldest month of the year.
B2 verb /ˈhɑːrnɪs/

harness

Meaning
To control and make use of natural resources, especially energy.
Example
Scientists are working to harness solar power effectively.
C2 noun /traɪˈʌmvɪər/

triumvir

Meaning
One of a group of three men holding power in ancient Rome.
Example
Caesar was a triumvir in the first Roman triumvirate.
C1 noun /ˈtoʊtəm/

totem

Meaning
A natural object, animal, or symbol that is revered as a spiritual emblem by a group or tribe.
Example
The eagle is considered a sacred totem in many cultures.
C2 noun /ˌɪmpjuˈteɪʃən/

imputation

Meaning
an accusation or attribution of blame
Example
The politician denied the imputation of corruption.
C2 adjective /ˈfætʃuəs/

fatuous

Meaning
silly or foolish, especially in a self-satisfied way
Example
His fatuous comments during the meeting annoyed everyone.
C1 verb /pɜːrtʃ/

perch

Meaning
To sit or rest on something high or narrow.
Example
The bird perched on the fence.
C1 verb /ˌʌndərˈlaɪ/

underlie

Meaning
to be the hidden cause or basis of something
Example
Strong cultural traditions underlie the community's practices.
C1 verb /ˈpɜːrkəleɪt/

percolate

Meaning
To filter gradually through a porous surface or substance; to spread slowly.
Example
The rainwater percolated through the soil into the groundwater.
C1 adjective /ʌlˈtɪəriər/

ulterior

Meaning
hidden or secret, often with a selfish motive
Example
He invited her with an ulterior motive.
A1 noun /ˈɪntənet/

internet

Meaning
A global computer network providing a variety of information and communication facilities.
Example
The internet has revolutionized the way we access information.
B2 noun /vaɪn/

vine

Meaning
a climbing or trailing plant with long stems; a plant that produces grapes
Example
The vine climbed up the wall and covered it with green leaves.
B1 noun /ˈev.ɪ.dəns/

Evidence

Meaning
the available body of facts or information indicating whether a belief or proposition is true
Example
The detective found crucial evidence that solved the mysterious case.
C2 noun /ˈbrɪk ə ˌbræk/

bric-a-brac

Meaning
Small decorative objects or ornaments, often of little value.
Example
The shelves were filled with old bric-a-brac from her travels.
C2 noun /ˈpiːs ɡʊdz/

Piece-goods

Meaning
textiles or fabrics sold by the yard or meter; cloth materials
Example
The tailor bought piece-goods from the wholesale market to make custom dresses.
C1 adjective /ˈsaʊnd.pruːf/

Sound-proof

Meaning
impervious to sound; preventing sound from entering or leaving
Example
The recording studio has sound-proof walls.
B2 noun ˈkrɪp.toʊˌkɝː.ən.si

cryptocurrency

Meaning
Decentralized digital currency operated using blockchain technology.
Example
Bitcoin is the most popular cryptocurrency in the market.
B2 noun /ˌkɒn.tɪˈnjuː.ɪ.ti/

continuity

Meaning
the state of being continuous or connected; consistency over time
Example
Maintaining continuity in leadership is essential for organizational stability.
B1 verb /əˈdɒpt/

adopt

Meaning
To take something as your own, such as a child, idea, or method.
Example
They decided to adopt a child from the orphanage.
B2 noun /ˈmʊzlɪm/

muslim

Meaning
a follower of Islam
Example
He is a devout Muslim.
C1 verb trænˈsɛnd

transcend

Meaning
To go beyond the limits of something; to surpass or exceed
Example
His effort to transcend traditional methods was commendable.
C1 verb /ˈræʃənəlaɪz/

rationalize

Meaning
to attempt to explain or justify behavior or decisions with logical reasons, even if they are not true or appropriate
Example
She tried to rationalize her lateness by blaming the traffic.
C1 adjective /ɪmˈpɜːrviəs/

impervious

Meaning
Not allowing fluid to pass through; unable to be affected by something.
Example
The jacket is impervious to rain.
B1 noun, verb /flæɡ/

flag

Meaning
a piece of fabric with a symbol or colors; or to mark or signal attention
Example
They raised the national flag during the ceremony.
B2 adjective /əˈstɒnɪʃt/

astonished

Meaning
feeling very surprised or amazed
Example
She was astonished by the magician's incredible trick.
C1 adjective /ˌɪndɪˈfɛnsəbl̩/

indefensible

Meaning
not able to be protected or justified
Example
The minister’s remarks were considered indefensible by the public.
C2 adjective /ˈnjuːmɪnəs/

numinous

Meaning
having a strong spiritual or mysterious quality
Example
The temple had a numinous atmosphere that inspired awe.
C2 noun ˌæɡ.roʊ.iˈkɒl.ə.dʒi

agroecology

Meaning
A scientific discipline that studies agricultural systems by applying ecological concepts and principles.
Example
Agroecology promotes eco-friendly farming.
B1 noun /ˈdʒaɪ.ənt/

Giant

Meaning
an imaginary or mythical being of human form but superhuman size; something of great size or force
Example
The technology giant announced record profits for the third consecutive quarter.
C2 adjective /ˈɡɛə.rɪʃ/

garish

Meaning
Excessively bright and showy, often in a tasteless or unattractive way.
Example
The room was decorated with garish neon lights.
A2 noun /hoʊl/

Hole

Meaning
a hollow place in a solid body or surface; an opening through something
Example
The dog dug a deep hole in the backyard to bury its favorite bone.
C2 noun /ˈæntɪkwɛri/

antiquary

Meaning
A person who studies, collects, or deals in antiques or ancient objects.
Example
The antiquary spent years collecting rare manuscripts from the medieval period.
C2 noun ˈɒpjʊləns

opulence

Meaning
Great wealth or luxuriousness.
Example
The opulence of the mansion was evident in its ornate furnishings.
C1 adjective ˈdɪs.pər.ət

disparate

Meaning
containing elements very different from one another.
Example
Their opinions were disparate, leading to debates.
C1 verb /rɪˈkaʊnt/

recount

Meaning
to narrate or tell the details of an event or experience
Example
She recounted her adventures during the summer trip.
B2 verb /dɪˈstɪŋɡwɪʃ/

distinguish

Meaning
to recognize or show the differences between two or more things; to set apart as different
Example
It can be difficult to distinguish between truth and rumor.
B2 noun /ˈnɒvəlɪst/

novelist

Meaning
a person who writes novels
Example
The novelist spent years writing his new book.
C2 adjective /suːˈpɜːrnəl/

supernal

Meaning
Relating to the heavens; celestial or divine.
Example
The painting captured a supernal beauty that felt otherworldly.
C1 adjective /fəˈnætɪkəl/

fanatical

Meaning
showing extreme enthusiasm or obsession
Example
She has a fanatical interest in collecting vintage stamps.
C1 noun /ˈaɪsətəʊp/

isotope

Meaning
Atoms of the same element with equal number of protons but different numbers of neutrons.
Example
Carbon-14 is a radioactive isotope used in dating fossils.
C2 noun /əˈrɪə/

arrear

Meaning
A debt or payment that is overdue and unpaid.
Example
He was sued for an arrear of rent.
B1 noun /ˈkemɪst/

chemist

Meaning
a scientist who studies chemistry; a person trained to prepare and dispense medicines
Example
The chemist analyzed the sample to determine its composition.
C1 noun /ˈɪŋ.krə.mənt/

Increment

Meaning
an increase or addition, especially one of a series on a fixed scale; a regular increase in salary
Example
He received an annual increment of five percent in his salary this year.
B1 adverb /pəˈlaɪt.li/

Politely

Meaning
in a respectful and considerate manner; courteously; with good manners
Example
She politely declined the invitation because she had other commitments.
A2 noun /ɪˈfekt/

Effect

Meaning
a change that is a result or consequence of an action or other cause
Example
The new medicine had a positive effect on the patient's recovery.
C2 noun /ˌdɪfəˈrɛnʃə/

differentia

Meaning
A distinguishing characteristic that sets one thing apart from another.
Example
The differentia of humans is their ability to reason abstractly.
A1 pronoun /ðɛər/

their

Meaning
belonging to or associated with the people or things previously mentioned
Example
Their house is on the corner.
B2 verb ˈeksɪkjuːt

execute

Meaning
To carry out or put into effect a plan, order, or course of action.
Example
NASA plans to execute the mission in three phases.
A1 pronoun /ʌs/

us

Meaning
used to refer to the speaker and one or more other people as the object of a verb or preposition
Example
She gave us a gift.
C1 adjective /ɪnˈses.ənt/

incessant

Meaning
Continuing without pause or interruption; constant.
Example
The incessant noise from the construction site made it hard to concentrate.
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 adjective /ˈmærɪtəl/

marital

Meaning
Relating to marriage or the relationship between husband and wife.
Example
They sought counseling to resolve their marital issues.
C1 adjective /ˌʌnɪnˈhɪbɪtɪd/

uninhibited

Meaning
Not restrained or restricted; free in behavior or expression.
Example
She gave an uninhibited laugh at the joke.
A2 noun/verb /ˈsiːzən/

season

Meaning
One of the four periods of the year characterized by specific weather conditions; also, to add flavor to food.
Example
Spring is my favorite season of the year.
B2 noun /ˌaɪ.səˈleɪ.ʃən/

Isolation

Meaning
the process or fact of isolating or being isolated; separation from other people or things
Example
The patient was kept in isolation to prevent the spread of the infectious disease.
C2 verb /kənˈvoʊk/

convoke

Meaning
to call together or summon a meeting or assembly
Example
The committee convoked an emergency session to discuss the crisis.
B1 noun ˌhjuː.mən ˈraɪts

human rights

Meaning
A right that is believed to belong justifiably to every person.
Example
Human rights protect individual freedoms.
C2 noun /nuːt/

Newt

Meaning
a small amphibian with a long tail that lives both in water and on land
Example
The newt swam gracefully in the pond.
B2 adjective /ˈpɛti/

petty

Meaning
Of little importance or trivial; also describes a person overly concerned with small or unimportant matters.
Example
She often gets upset over the most petty things.
C1 noun /vɪˈvæsɪti/

vivacity

Meaning
The quality of being lively, animated, and full of energy.
Example
The child’s vivacity brightened the entire room.
C1 verb /riˈɪtəreɪt/

reiterate

Meaning
To say something again or repeatedly for emphasis or clarity.
Example
The teacher reiterated the importance of honesty.
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 adjective /ˈstɒdʒi/

stodgy

Meaning
Dull, uninspired, or old-fashioned; also heavy and hard to digest when referring to food.
Example
The lecture was so stodgy that many students struggled to stay awake.
C2 noun /ˈtælən/

talon

Meaning
A claw, especially one belonging to a bird of prey.
Example
The eagle gripped the fish with its sharp talons.
C1 noun /ˈzɛnəˌfoʊb/

xenophobe

Meaning
a person who dislikes or fears people from other countries or cultures
Example
The politician was criticized as a xenophobe due to his anti-immigrant policies.
C1 adjective /ˈtrænzɪtɔːri/

transitory

Meaning
Not permanent; temporary.
Example
The transitory nature of fame makes it difficult to maintain.
B2 noun ˈʃeɪdɪd ˈɛəriə

shaded area

Meaning
An area that is protected from direct sunlight.
Example
We sat in a shaded area by the riverbank.
B2 noun /kwest/

Quest

Meaning
a journey or search for something; an adventure to achieve a goal
Example
The knight embarked on a quest to find the legendary treasure.
C1 adjective /ˈfɑːð.ər.ləs/

fatherless

Meaning
without a father
Example
The fatherless child relied on the support of his community.
A2 verb /əˈraɪv/

arrive

Meaning
to reach a destination; to come to a place
Example
The train will arrive at the station in ten minutes.
B1 noun aɪˈdɛntɪti

identity

Meaning
The fact of being who or what a person or thing is; the characteristics determining who or what a person or thing is.
Example
The day reinforces our national identity.
C2 noun /ˈkæriən/

carrion

Meaning
the decaying flesh of dead animals
Example
Vultures feed on carrion left in the fields.
C1 noun /ˈstætʃuːt/

statute

Meaning
A written law passed by a legislative body.
Example
The new statute protects workers' rights.
B2 adjective /leɪm/

Lame

Meaning
unable to walk normally because of an injury or illness affecting the leg or foot; weak and unconvincing
Example
The injured horse was lame and couldn't walk properly.
A2 adjective /ʃaɪ/

Shy

Meaning
nervous or timid in the company of other people
Example
The shy student rarely spoke up in class discussions.
B2 noun /heə(r)/

Hare

Meaning
a fast-running long-eared mammal that resembles a large rabbit
Example
The hare quickly ran across the field.
C1 noun səˈsteɪ.nə.bəl tekˈnɒl.ə.dʒi

sustainable technology

Meaning
Technology designed to meet present needs without compromising future generations' ability to meet their needs.
Example
Sustainable technology ensures a cleaner future.
B2 preposition /kənˈsɜːnɪŋ/

concerning

Meaning
about or relating to something; causing worry or anxiety
Example
There are some reports concerning the new project.
C1 noun ˌkɒm.pjʊˈteɪ.ʃən

computation

Meaning
The action of mathematical calculation.
Example
Complex computation is required for AI models.
C1 adjective /əˈkɪn/

akin

Meaning
Of similar character or related by blood.
Example
His reaction was akin to shock.
C1 adjective /ˈvɪskəs/

viscous

Meaning
Having a thick, sticky consistency between solid and liquid.
Example
Honey is a viscous liquid that flows slowly.
C2 adjective /ɪnˈkoʊ.ɪt/ or /ɪnˈkoʊ.eɪt/

inchoate

Meaning
Just begun and not fully formed; rudimentary.
Example
His inchoate ideas needed more research to be developed.
A2 adjective /smɑːrt/

Smart

Meaning
intelligent; quick-witted; well-dressed; stylish
Example
She made a smart decision to invest in technology stocks.
A1 adjective /ˈfeɪ.məs/

famous

Meaning
Known about by many people; renowned.
Example
This area is famous for its unique heritage.
B1 noun /ˌɒp.əˈtjuː.nə.ti/

opportunity

Meaning
A favorable chance or set of circumstances that makes it possible to do something.
Example
She seized the opportunity to study abroad.
B2 verb ˈfɔːr.mjə.leɪt

formulate

Meaning
To create or develop a plan or idea clearly and specifically, to construct an idea or strategy clearly.
Example
The company must formulate a strategy for expansion.
C1 verb/adjective /dɪˈdʒɛnəreɪt/

degenerate

Meaning
To decline or deteriorate in quality, character, or condition; or someone with low moral standards.
Example
The once thriving empire began to degenerate into chaos.
C1 noun /dɪˈsiːt/

Deceit

Meaning
the action or practice of deceiving someone by concealing or misrepresenting the truth
Example
His deceit was discovered when the truth about his qualifications came to light.
C2 verb /traɪˈsɛkt/

trisect

Meaning
To divide into three parts.
Example
The teacher asked the students to trisect the line segment.
C2 adjective /ˌbiːəˈtɪfɪk/

beatific

Meaning
blissfully happy or showing great joy
Example
She had a beatific smile after hearing the good news.
C1 adverb/noun /ˌhɪərˈæftər/

hereafter

Meaning
from now on; in the future; also refers to life after death.
Example
Hereafter, all reports must be submitted electronically.
C1 noun /ˈdeɪtəm/ or /ˈdætəm/

datum

Meaning
a single piece of information; a fact used as a basis for reasoning or calculation
Example
Each datum in the survey was carefully analyzed.
C1 noun /ˈwɪzərdri/

wizardry

Meaning
The art or practice of magic; great skill or expertise in something.
Example
The programmer's wizardry amazed everyone in the room.
C2 adjective /rəˈpeɪ.ʃəs/

rapacious

Meaning
having an extreme desire to take things for oneself, greedy
Example
The rapacious landlord raised the rent without reason.
C1 adverb /ˈæm.ɪ.kə.bli/

Amicably

Meaning
in a friendly way without anger or resentment
Example
The divorce was settled amicably between both parties.
C2 verb /biˈætɪfaɪ/

beatify

Meaning
to make blessed or holy, especially in the Roman Catholic Church, to declare a deceased person to be among the blessed
Example
The pope decided to beatify the martyr for his faith and sacrifice.
C1 adjective /rɪˈpʌl.sɪv/

Repulsive

Meaning
extremely unpleasant; causing strong dislike or disgust
Example
The smell of rotten eggs was absolutely repulsive.
B1 noun /ˈsʌb.ɜːb/

Suburb

Meaning
a residential area outside the central part of a city; an outlying district of a city
Example
They moved to a quiet suburb to raise their children away from city noise.
A2 verb; adjective /broʊk/

broke

Meaning
past tense of break; having no money or being financially poor
Example
I broke my phone last night and now I’m completely broke.
C1 adjective /daɪˈvɜːrsɪfaɪd/

diversified

Meaning
Made or having variety in form, nature, or content.
Example
The company adopted a diversified business strategy to reduce risks.
C1 verb /tʃɑːr/

char

Meaning
To burn or scorch something so that it becomes blackened.
Example
The cook accidentally charred the steak.
B2 adjective /ˈrɪdən/

ridden

Meaning
Full of or dominated by something unpleasant.
Example
The country was ridden with corruption.
C2 adjective /roʊn/

roan

Meaning
denoting an animal, especially a horse, having a coat of mixed colors, typically reddish-brown and white
Example
The rider mounted a roan horse with a speckled coat.
C1 verb /rɪˈmjuːnəreɪt/

remunerate

Meaning
To pay someone for services or work done.
Example
The company will remunerate employees fairly for their overtime.
C1 noun /kiː/

quay

Meaning
A platform lying alongside or projecting into water for loading and unloading ships.
Example
The cargo was unloaded at the quay.
B2 noun /ɒdz/

odds

Meaning
the likelihood or probability of something happening; chances for or against something
Example
The odds of winning the lottery are very low.
B2 noun /mɪθ/

myth

Meaning
A traditional story explaining natural or social phenomena, often involving supernatural beings; a widely held but false belief.
Example
The myth of the phoenix tells of a bird reborn from its ashes.
B2 noun /mʌŋk/

Monk

Meaning
a man who is a member of a religious community living under vows
Example
The monk spent hours in meditation each day.
C1 verb /ɜːr/

err

Meaning
to make a mistake or be incorrect
Example
To err is human, to forgive divine.
B2 noun /ˈfrɛʃnəs/

freshness

Meaning
The quality of being new, clean, and full of energy.
Example
The freshness of the morning air made everyone feel alive.
B2 adverb /kənˈsɪstəntli/

consistently

Meaning
in a way that does not vary; regularly and dependably
Example
She has been performing consistently well in her studies.
C2 noun /ˈdɛskænt/

descant

Meaning
An additional melody or counterpoint sung or played above the main melody.
Example
The choir added a beautiful descant to the hymn.
C2 noun /ˈsʌfərəns/

sufferance

Meaning
patient endurance of pain, hardship, or delay; passive consent or tolerance
Example
He lived in poverty with quiet sufferance.
C2 noun /fiːˈkʌndɪti/

fecundity

Meaning
the ability to produce an abundance of offspring or new growth; fertility
Example
The fecundity of the river delta supports diverse wildlife.
C1 noun /ˈkændɪdnəs/

candidness

Meaning
The quality of being open, honest, and straightforward
Example
Her candidness during the meeting impressed everyone.
C1 adjective /ˈluː.mɪ.nəs/

Luminous

Meaning
bright; shining; emitting light; radiant
Example
The luminous stars filled the dark night sky.
C1 noun /tɪf/

tiff

Meaning
a small or petty quarrel or argument
Example
They had a little tiff over what movie to watch.