experiment
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A2 noun/verb /ɪkˈsperɪmənt/

experiment

Meaning
a test or trial carried out to discover something or prove an idea
Example
The scientist conducted an experiment on plant growth.
C1 noun, verb /ɡliːm/

gleam

Meaning
a small or brief shining light; to shine softly
Example
A gleam of hope appeared in her eyes.
B2 verb /dɪˈraɪv/

derive

Meaning
To obtain something from a source.
Example
Many English words derive from Latin.
C2 adjective /ˈsʌb.æs.ɪd/

subacid

Meaning
Slightly sour or acidic in taste or nature.
Example
The fruit had a subacid flavor that was refreshing on a hot day.
B2 noun səˌsteɪ.nəˈbɪl.ɪ.ti

sustainability

Meaning
The ability to be maintained at a certain rate or level; the avoidance of the depletion of natural resources in order to maintain ecological balance.
Example
Sustainability ensures long-term environmental health.
C1 adjective /məˈlɪʃəs/

Malicious

Meaning
having or showing a desire to cause harm to someone; spiteful
Example
The malicious software damaged many computers.
C1 noun /kwɔːrˈtɛt/

quartet

Meaning
A group of four people playing music or singing together.
Example
The string quartet performed beautifully at the concert.
C2 noun /ˈruː.mɪ.nənt/

ruminant

Meaning
a cud-chewing mammal, such as a cow or sheep
Example
Cows are ruminants that chew cud.
B1 adjective /kənˈsɪdərəbl/

considerable

Meaning
large in amount, size, or importance
Example
The project required a considerable amount of time and money.
C2 noun /sɪˈnɛrəsɪs/

syneresis

Meaning
The contraction of two adjacent vowels into a single syllable or the separation of liquid from a gel.
Example
The yogurt showed syneresis when liquid separated on top.
C2 adjective /laɪˈsɛnʃəs/

licentious

Meaning
Lacking moral restraint; disregarding accepted rules of conduct.
Example
The novel was criticized for its licentious themes.
C1 adjective /ˈneɪm.ləs/

Nameless

Meaning
having no name; anonymous; unknown; unidentified
Example
The nameless fear haunted him throughout the night.
C2 noun /ˈduːti/

Dhuti

Meaning
a traditional Indian garment for men consisting of a piece of unstitched cloth worn around the waist and legs
Example
The elderly man wore a white dhuti during the religious ceremony.
C1 noun /ˈælɔɪ/

alloy

Meaning
A mixture of metals or a metal combined with another element.
Example
Bronze is an alloy of copper and tin.
B2 noun /kraɪˈtɪəriə/

criteria

Meaning
Standards or principles by which something is judged or decided.
Example
The candidates were evaluated based on strict criteria.
C2 noun /dɪˈbɛntʃər/

debenture

Meaning
a type of debt instrument not secured by physical assets or collateral
Example
The company raised capital by issuing debentures to investors.
C1 noun ˌɪrɪˈvɜːrsəbl ˈdæmɪdʒ

irreversible damage

Meaning
Harm or injury that cannot be undone or repaired.
Example
Climate change causes irreversible damage to ecosystems.
B2 noun /kəmˈpæʃ.ən/

Compassion

Meaning
sympathetic concern for the sufferings or misfortunes of others; deep awareness of suffering with a desire to help
Example
She showed great compassion towards the homeless children by providing them food and shelter.
C2 noun /skriːd/

screed

Meaning
a long, tedious piece of writing or speech; also a layer of material like cement spread on a surface
Example
He delivered a long screed against corruption.
C2 verb /ˌsuːpərˈæn.ju.eɪt/

superannuate

Meaning
to retire someone with a pension, usually due to age or long service
Example
The company decided to superannuate its senior employees after thirty years of service.
B2 noun /ˈbɒt.əl.nek/

bottleneck

Meaning
Narrow path or obstruction, a place or situation where flow becomes slow.
Example
The narrow bridge is a major bottleneck during rush hour.
B2 adjective /ˈvaɪəbəl/

viable

Meaning
Capable of working successfully; feasible.
Example
A viable solution is necessary for long-term success.
C1 adjective /sɔɪld/

soiled

Meaning
dirty or stained; not clean
Example
His clothes were soiled after playing in the mud.
C1 adjective /ˈsɛnʃənt/

sentient

Meaning
Able to perceive or feel things.
Example
Humans are sentient beings capable of reasoning.
C2 adjective /nɑːrld/

gnarled

Meaning
Twisted, rough, and knotted, especially with age.
Example
The old man had gnarled hands from years of hard work.
B2 noun ˈlɛvərɪdʒ

leverage

Meaning
The use of borrowed capital or resources to increase the potential return of an investment; using something to maximum advantage.
Example
Leverage amplifies your efforts and scales your work.
B2 adjective /ˈhoʊmli/

Homely

Meaning
simple and comfortable; unpretentious; plain in appearance; cozy and familiar
Example
She enjoyed the homely atmosphere of the small café.
C2 verb /ˈblʌdʒən/

bludgeon

Meaning
to hit someone with a heavy object; to force someone into doing something
Example
The guard was bludgeoned by the attacker in the alley.
C2 verb /leɪv/

lave

Meaning
To wash or bathe.
Example
She laved her face with cool water.
B2 noun, verb /steɪk/

stake

Meaning
A share or interest in a business or venture; to risk or support something of value.
Example
He has a major stake in the new company.
C2 noun /kəˈleɪʃən/

collation

Meaning
the act of collecting, comparing, and arranging in proper order
Example
The librarian spent hours on the collation of old manuscripts.
C1 adjective /ˈpɛndənt/

pendent

Meaning
hanging down or suspended
Example
The pendent branches touched the ground.
C1 noun/verb /vɔːlt/

vault

Meaning
A secure room for storing valuables; also to leap or spring over something.
Example
The bank kept its gold bars in a secure vault.
B1 noun wɛlθ

wealth

Meaning
The state of being rich; material prosperity; an abundance of valuable possessions or money.
Example
Wealth creation involves building assets that earn while you sleep.
B2 verb /stɪtʃ/

stitch

Meaning
to sew with needle and thread; to join pieces of fabric
Example
She will stitch the torn dress carefully.
C1 adjective /ˌɪrɪˈspɛktɪv/

Irrespective

Meaning
without taking something into account; regardless of
Example
All students will be treated equally, irrespective of their background.
C1 adjective /prəˈsiːdʒərəl/

procedural

Meaning
Relating to an established or official way of doing something; concerned with procedure.
Example
The committee followed the procedural rules strictly.
B2 noun /ˈpleɪˌɔːf/

playoff

Meaning
a series of games played to determine a champion among top teams
Example
The team qualified for the playoffs after a strong season.
B2 adjective /ˈvɜːrtɪkl/

vertical

Meaning
Standing or pointing straight up; perpendicular to the ground.
Example
The skyscraper has a perfectly vertical design.
B2 verb /ˈvɒmɪt/

vomit

Meaning
to bring up food from the stomach through the mouth; to be sick
Example
The patient began to vomit after taking the medication.
C1 adjective /riˈækʃəˌneri/

reactionary

Meaning
Opposing political or social progress or reform; extremely conservative.
Example
The group took a reactionary stance against the new policies.
B2 verb /səbˈmɪt/

submit

Meaning
to present for consideration; to surrender; to yield
Example
Please submit your assignment by Friday.
C2 verb /ˈɡlaʊ.ər/

glower

Meaning
To look at someone with an angry or sullen expression.
Example
He glowered at his rival across the room.
C1 noun /moʊˈzeɪɪk/

mosaic

Meaning
A picture or pattern produced by arranging together small pieces of stone, tile, or glass.
Example
The church ceiling was decorated with a beautiful mosaic.
B2 noun /ɪnˈtɛnsəti/

intensity

Meaning
The quality of being extreme, strong, or forceful in degree.
Example
The intensity of the storm frightened the villagers.
C1 noun /kəˈmɪtl̩/

committal

Meaning
The action of sending a person to prison or a mental hospital; also the act of committing something to a particular place.
Example
The judge ordered the committal of the accused to custody.
C2 verb /ˈhæri/

harry

Meaning
to constantly attack, harass, or annoy
Example
The army harried the enemy with sudden raids.
C1 noun ˌɪn.ɪˈfɪʃ.ən.si

inefficiency

Meaning
The state or quality of not achieving maximum productivity; failure to make the best use of time or resources.
Example
Government inefficiency leads to slow project completion.
C1 adjective /ˈnæk.ərd/

Knackered

Meaning
extremely tired; exhausted
Example
I'm absolutely knackered after working all day.
C1 noun /ˈvenɪsən/

Venison

Meaning
meat from a deer used as food
Example
The restaurant serves delicious venison steaks.
C1 noun /ˌluː.brɪˈkeɪ.ʃən/

lubrication

Meaning
The action of applying a substance to reduce friction between surfaces in mutual contact.
Example
Lubrication of the eyes is essential for well-being.
B2 adjective /bɪˈheɪvjərəl/

behavioral

Meaning
relating to the way a person or animal acts
Example
The psychologist studied the child's behavioral patterns.
C1 verb /sɪˈsiːd/

secede

Meaning
To formally withdraw from a political or organizational union.
Example
Several states threatened to secede from the union.
C1 adjective /ˈpærəmaʊnt/

paramount

Meaning
more important than anything else; supreme
Example
Safety is of paramount importance in this factory.
B2 adjective /ʌnˈiːzi/

Uneasy

Meaning
worried; anxious; uncomfortable; restless
Example
She felt uneasy about walking alone at night.
A2 noun /vəˈkæbjʊləri/

vocabulary

Meaning
the set of words known and used by a person, group, or language; the words used in a particular field or subject
Example
Reading every day helps improve your vocabulary.
B2 noun /prəˈfɪʃənsi/

proficiency

Meaning
Competency or skill; expertise.
Example
His proficiency in multiple languages is remarkable.
C2 noun /ˈlɛvi/

levee

Meaning
An embankment built to prevent the overflow of a river or to hold back water.
Example
The town built a levee to protect itself from flooding.
B2 verb /əˈkʌstəm/

accustom

Meaning
to make someone familiar with something through regular experience or use
Example
It took him a while to accustom himself to the new environment.
C1 noun ˈdɛtrɪ.mənt

detriment

Meaning
Harm, damage, impairment.
Example
Smoking is a detriment to health.
C1 adjective /ɪkˈstɛnjueɪtɪŋ/

extenuating

Meaning
serving to make a fault or an offense seem less serious
Example
She asked for leniency due to extenuating circumstances.
C2 verb /kəˈmɪŋɡəl/

commingle

Meaning
To mix or blend different things together.
Example
The charity does not commingle donations with operational funds.
C2 adjective /ˈlɪmpɪd/

limpid

Meaning
Clear and transparent, easily understood.
Example
The limpid water of the lake reflected the sky perfectly.
C1 noun /ˌbɪbliˈɒɡrəfi/

bibliography

Meaning
a list of books, articles, or other sources used or referred to in scholarly work
Example
The report includes a detailed bibliography at the end.
C2 noun /pərˈdɪʃən/

perdition

Meaning
A state of eternal spiritual ruin, often referring to hell or damnation.
Example
The preacher warned that greed would lead to perdition.
C1 noun /ˈmɪmɪkri/

mimicry

Meaning
The act of imitating someone or something, often for humor or learning.
Example
The comedian’s mimicry of celebrities made the audience laugh.
C1 verb /ˈɛm.ə.neɪt/

emanate

Meaning
To come out or spread from a source.
Example
A sweet fragrance emanated from the garden.
C1 noun /ˈsʌm.ɪt əv ðə ˈfjuː.tʃər/

Summit of the Future

Meaning
A high-level conference focused on addressing future challenges and opportunities.
Example
The Summit of the Future addressed global challenges.
C2 verb /dɪsˈkaʊntənəns/

discountenance

Meaning
To disapprove of or discourage something.
Example
The teacher strongly discountenanced cheating in exams.
A2 adverb /fɔːrˈɛvər/

forever

Meaning
For all future time; for always.
Example
She promised to love him forever.
B2 noun /prɒkˈsɪmɪti/

proximity

Meaning
Nearness in space, time, or relationship.
Example
The proximity of the school to her house made it convenient.
C1 verb /riˈdʒɔɪn/

rejoin

Meaning
to join again or return to a group, place, or activity
Example
After a short break, she decided to rejoin the team.
C1 adjective /dɪˈsiːtfəl/

deceitful

Meaning
Deliberately misleading or dishonest.
Example
She gave a deceitful answer to hide the truth.
A2 verb tʃeɪs

chase

Meaning
To pursue in order to catch or overtake; to follow rapidly or eagerly
Example
Don't chase two rabbits at once.
A2 noun /ˈrɛkɔːd/

record

Meaning
a written or spoken account of something
Example
I kept a record of all the meetings.
C1 adjective /ˈkæl.əs/

Callous

Meaning
showing or having an insensitive and cruel disregard for others; emotionally hardened
Example
He showed a callous disregard for others' feelings.
C1 adjective ˈsek.tər spəˈsɪf.ɪk

sector-specific

Meaning
Relating to or designed for a particular sector or industry.
Example
Sector-specific policies attract targeted investments.
B2 noun, adjective /ˈkɒrəl/

coral

Meaning
a hard, rock-like marine organism formed by tiny sea animals; a pinkish-orange color resembling coral
Example
The coral in the reef provides shelter for many sea creatures.
C2 verb /ˈstʌltɪfaɪ/

stultify

Meaning
to make someone or something appear foolish, or to hinder effectiveness and enthusiasm
Example
The repetitive tasks seemed to stultify the workers' creativity.
B2 adjective /ˈwɪt.i/

Witty

Meaning
having or showing quick intelligence; amusing in a clever way
Example
Her witty response to the critic's question impressed the entire audience.
C2 noun /ˈkɪldʒɔɪ/

killjoy

Meaning
a person who spoils the fun or enjoyment of others
Example
Don’t be a killjoy at the party.
B2 noun /ˈmʌð.ər.lænd/

Motherland

Meaning
the country where one was born or has citizenship; homeland
Example
He always spoke fondly of his motherland.
A2 adverb /ˈkwaɪ.ət.li/

Quietly

Meaning
without making much noise; silently; in a calm manner
Example
She spoke quietly so she wouldn't wake the baby.
B2 noun ˈlænd.mɑːk

landmark

Meaning
An object or feature of a landscape or town that is easily seen and recognized from a distance; an important stage or turning point.
Example
The space restaurant is a landmark in innovation.
C2 adjective /ˌhæɡ.i.əˈɡræf.ɪk/

hagiographic

Meaning
Excessively flattering or idealized, often in a biography or portrayal of someone.
Example
The documentary was criticized for its hagiographic portrayal of the leader.
C1 noun /deɪˈbɑː.kəl/

debacle

Meaning
A sudden and ignominious failure; a fiasco.
Example
The company's poor management led to a financial debacle.
B2 adjective /ˈhevənli/

Heavenly

Meaning
relating to heaven; extremely pleasant or beautiful
Example
The chocolate cake had a heavenly taste that melted in my mouth.
B2 verb /ɪmˈbɛd/

embed

Meaning
to fix something firmly into a surrounding mass or context
Example
The journalist was embedded with the military unit.
C1 noun/adjective /ˈluː.nə.tɪk/

lunatic

Meaning
A person who is insane or acting in a foolish or reckless way; also used as an adjective meaning insane.
Example
The driver was driving like a lunatic on the highway.
A1 verb /rɪˈmembə/

remember

Meaning
to bring a past event back into one's mind; to keep in memory
Example
I remember my first day at school.
C1 noun /ˈpɪɡmənt/

pigment

Meaning
a natural or artificial substance used to give color to something
Example
The artist mixed different pigments to create the perfect shade of blue.
C2 noun /lɒx/

loch

Meaning
a lake or sea inlet, especially in Scotland
Example
Tourists visit Loch Ness to search for the legendary monster.
B2 noun /depθ/

Depth

Meaning
the distance from the top or surface to the bottom; the quality of being intense or profound
Example
The depth of the ocean in this area reaches over three thousand meters.
C2 noun /ˈkɒnk.leɪv/

conclave

Meaning
a private meeting, especially a secret or important one
Example
The leaders met in a secret conclave to discuss the strategy.
C2 adjective /fɪˈdjuːʃəl/

fiducial

Meaning
based on trust or confidence; serving as a standard of reference
Example
The fiducial point on the map ensures accurate measurements.
C1 noun /ˈɒf.sprɪŋ/

offspring

Meaning
a person's child or children; an animal's young
Example
The bird carefully fed its offspring.
A2 noun /rent/

Rent

Meaning
a payment made periodically by a tenant to a landlord for use of property
Example
The monthly rent for this apartment is quite affordable.
C1 verb /ˈrʌsl/

rustle

Meaning
To make a soft, light sound like leaves or paper moving.
Example
The leaves rustled gently in the evening breeze.
A2 preposition /tɔːrdz/

towards

Meaning
in the direction of
Example
He is running towards the park.
B2 verb /ˌʌndərˈmaɪn/

undermine

Meaning
to gradually weaken or damage something or someone
Example
Constant criticism can undermine a child's confidence.
B2 noun pərˈsɛpʃən

perception

Meaning
The ability to see, hear, or become aware of something through the senses
Example
Our perception of the situation was shaped by our prior experiences.
C2 noun /kəmˈpleɪsəns/

complacence

Meaning
a feeling of quiet pleasure or self-satisfaction, often without awareness of potential danger
Example
His complacence prevented him from noticing the risks.
B2 noun /əˈriːnə/

arena

Meaning
a large area surrounded by seats for sports, entertainment, or other events
Example
The basketball game will be held in the new arena downtown.
B2 verb /ɪˈrʌpt/

erupt

Meaning
to burst forth suddenly and violently
Example
The volcano erupted after centuries of dormancy.
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.
B2 noun /ˈmɑːr.tɪn/

Martin

Meaning
small swift-flying bird that catches insects on the wing
Example
The martin built its nest under the bridge.
C2 verb /ɪkˈspɛktəreɪt/

expectorate

Meaning
to cough up and spit out mucus from the throat or lungs
Example
The patient began to expectorate thick mucus.
C1 adjective /ˌsaɪkoʊsəˈmætɪk/

psychosomatic

Meaning
Relating to a physical illness or condition caused or aggravated by mental factors such as stress.
Example
Her stomach pain was diagnosed as psychosomatic, linked to stress.
C1 noun ˌfiː.zəˈbɪl.ə.ti

feasibility

Meaning
The state or degree of being easily or conveniently done; possibility.
Example
The company conducted a feasibility study before launching the project.
B2 adjective /ˌmɛtrəˈpɑːlɪtən/

metropolitan

Meaning
Relating to a large city, its surrounding areas, or its lifestyle.
Example
She moved to a metropolitan area for better job opportunities.
A1 verb /ɡroʊ/

grow

Meaning
to become larger or greater over a period of time; to develop
Example
Plants grow faster in spring.
B1 verb /piːl/

peel

Meaning
to remove the outer covering or skin from a fruit or vegetable
Example
She peeled the mango before eating it.
C1 verb, noun /spraʊt/

sprout

Meaning
to begin to grow; to produce new leaves or shoots
Example
The seeds began to sprout after a few days of rain.
A1 verb /θɪŋk/

think

Meaning
to have thoughts or ideas; to use your mind to consider something
Example
I think this is a good idea.
B2 noun /ˈkɔːtruːm/

courtroom

Meaning
a room in which legal cases are heard and decided by a judge
Example
The witness was called to testify in the courtroom.
A1 pronoun /ɪt/

it

Meaning
used to refer to a thing, animal, or idea previously mentioned or easily identified
Example
It is raining outside.
B2 noun ˈhoʊmˌskuː.lɪŋ

homeschooling

Meaning
The practice of educating children at home rather than sending them to a school.
Example
Homeschooling allows parents to tailor education to their child's needs.
C1 noun /ˈneb.jʊ.lə/

nebula

Meaning
A cloud of gas and dust in outer space, sometimes visible in the night sky.
Example
The Orion Nebula is one of the brightest in the sky.
A2 noun /tɪp/

tip

Meaning
a small but useful piece of advice
Example
I received a tip on how to improve my presentation.
B2 noun /ˌpɪə.riˈɒd.ɪ.kəl/

periodical

Meaning
a magazine or journal published at regular intervals
Example
She subscribed to a science periodical.
A2 noun /ˈfæʃ.ən/

fashion

Meaning
a popular or accepted style of clothing, behavior, or way of doing something
Example
She always keeps up with the latest fashion.