reservoir
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B2 noun /ˈrɛzərvwɑːr/

reservoir

Meaning
A large natural or artificial lake used as a source of water supply.
Example
The city built a new reservoir to ensure enough drinking water for its residents.
C2 adjective /ˌɪrɪˈmiːdiəbl̩/

irremediable

Meaning
Impossible to cure, repair, or remedy.
Example
The damage to the ancient manuscript was irremediable.
C1 noun /ˈkælkjʊləs/

calculus

Meaning
A branch of mathematics concerned with rates of change and accumulation; also a hard mineral deposit in the body such as on teeth.
Example
Calculus is essential for advanced studies in physics and engineering.
A2 adjective /ˈjuːs.ləs/

Useless

Meaning
having no beneficial purpose; not useful
Example
This broken computer is completely useless.
C1 verb /ˈbɪkər/

bicker

Meaning
To argue or quarrel about trivial matters.
Example
The children began to bicker over the last piece of cake.
C1 verb /ˈsætʃəˌreɪt/

saturate

Meaning
to fill completely with something until no more can be absorbed
Example
The heavy rain saturated the ground within minutes.
A2 noun /ˈfaɪəˌwɜːk/

firework

Meaning
a device that explodes or creates a display of lights and sounds, often used in celebrations
Example
The fireworks lit up the sky during the New Year's Eve celebration.
C2 noun /ʃiːf/

sheaf

Meaning
a bundle of grain stalks laid lengthwise and tied together after reaping; a bundle of objects tied together
Example
The farmer carried a sheaf of wheat on his shoulder.
A2 noun dɪˈskrɪpʃən

description

Meaning
A spoken or written account of a person, object, or event.
Example
His description was vivid.
B2 verb /ˈtɜːrmɪˌneɪt/

terminate

Meaning
to bring something to an end or to stop something from continuing
Example
The company decided to terminate his contract.
C1 noun /ˈpleɪˌraɪt/

playwright

Meaning
a person who writes plays
Example
Shakespeare is considered the greatest playwright of all time.
C2 noun /ˈɪrɪtənsi/

irritancy

Meaning
the quality or state of causing irritation; legal or formal invalidation
Example
The constant noise became an irritancy to the neighbors.
A1 noun /weɪ/

Way

Meaning
a method, style, or manner of doing something; a road or path
Example
There must be a better way to solve this problem.
C1 adjective/noun /ˈsʌkjələnt/

succulent

Meaning
Juicy or full of juice; also refers to a plant with thick, fleshy leaves adapted to storing water.
Example
The steak was so succulent that everyone enjoyed it.
C2 verb /ˈhæroʊ/

harrow

Meaning
to cause distress or torment; also to break up and smooth soil with a farm tool
Example
The tragic news harrowed the entire family.
B2 noun /ˈmɔːr.nɪŋ/

Mourning

Meaning
the expression of deep sorrow for someone who has died
Example
The family is in mourning for their grandmother.
B2 adverb /ˈmen.tə.li/

Mentally

Meaning
relating to the mind; in terms of mental processes
Example
She was mentally preparing herself for the exam.
A2 noun /ˈpʊd.ɪŋ/

Pudding

Meaning
a sweet dessert typically made by boiling or steaming
Example
My grandmother makes delicious chocolate pudding for dessert.
C2 noun /ˈvaɪnəri/

vinery

Meaning
A place where vines are cultivated, especially a vineyard or greenhouse for vines.
Example
The old vinery was filled with grapevines.
C2 verb /əˈɡræn.daɪz/

aggrandize

Meaning
To increase the power, wealth, or importance of a person or entity.
Example
The politician tried to aggrandize himself through exaggerated claims.
B2 verb /bɑːrk/

bark

Meaning
to make a sharp sound like a dog; to speak angrily
Example
The dog barks at strangers.
C2 adverb /ˈdʒɪndʒərli/

gingerly

Meaning
in a very careful or cautious manner
Example
She walked gingerly on the icy path.
C1 noun /ˈhaɪ.nəs/

Highness

Meaning
a title given to a person of royal rank; the quality or state of being high or elevated
Example
Your Highness, the royal carriage is ready to take you to the state banquet this evening.
C2 adjective /rɪˈfrɪndʒənt/

refringent

Meaning
Capable of refracting light or other waves.
Example
The refringent properties of the crystal bent the light into a spectrum.
A1 noun ækˈtɪv.ɪ.ti

Activities

Meaning
A thing that a person or group does or has done.
Example
Productive activities drive progress.
B1 noun /ˈbʊt.ʃər/

Butcher

Meaning
a person whose job is cutting up and selling meat in a shop
Example
The butcher recommended the best cut of beef for our dinner.
C1 verb /ɪkˈspend/

expend

Meaning
to use up or consume; to spend energy or resources
Example
He expended all his energy on the project.
C2 noun /ˌɔːltərˈkeɪʃən/

altercation

Meaning
a noisy argument or quarrel
Example
There was a brief altercation between the two drivers.
C2 verb /əˈdjuːs/

adduce

Meaning
To provide evidence or reasons to support an argument or idea.
Example
The lawyer adduced several examples to support his case.
C1 noun /ˌdɜːrməˈtɑːlədʒi/

dermatology

Meaning
The branch of medicine concerned with the skin and its diseases.
Example
He studied dermatology at medical school.
A2 noun, verb /pəʊst/

post

Meaning
a job or position, or to send something by mail
Example
She posted a letter to her friend yesterday.
B2 noun /ˌɪnsɪˈkjʊərɪti/

insecurity

Meaning
lack of confidence or assurance; a state of uncertainty or vulnerability
Example
Her insecurity made her doubt her abilities despite her experience.
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.
C2 adjective /ˌmækɪəˈvɛliən/

machiavellian

Meaning
cunning, scheming, and unscrupulous, especially in politics or in advancing one's career
Example
The politician was known for his Machiavellian tactics.
B2 adjective /ˌfɔːrθˈkʌmɪŋ/

forthcoming

Meaning
about to happen soon; willing to share information
Example
The company announced its forthcoming product launch.
A1 adverb /aʊt/

out

Meaning
moving or appearing away from the inside or center; not at home or present
Example
He stepped out of the room quietly.
B1 noun ˈɑːkɪtektʃə(r)

architecture

Meaning
The art or science of designing and constructing buildings.
Example
Ancient architecture is fascinating.
B2 adjective prɪˈlɪm.ɪ.nər.i

preliminary

Meaning
Denoting an action or event preceding or done in preparation for something fuller or more important.
Example
Preliminary steps are crucial before the main project.
C2 adjective /bruːsk/ or /brʌsk/

brusque

Meaning
abrupt or blunt in manner or speech, often seen as rude
Example
His brusque reply ended the conversation.
C2 noun /ˈɡɒz.lɪŋ/

gosling

Meaning
a young goose
Example
The mother goose carefully protected her goslings.
C1 noun /ˈmoʊ.tər ˈlɔː.ri/

Motor lorry

Meaning
a large motor vehicle used for transporting goods; truck
Example
The motor lorry delivered fresh vegetables to the market.
C1 noun ˌɔːɡ.menˈteɪ.ʃən

augmentation

Meaning
Increasing quantity, power or performance.
Example
The company invested in the augmentation of its workforce.
B2 noun/verb /ˈsæd.əl/

saddle

Meaning
A seat fastened on the back of a horse for riding; to burden someone with a responsibility.
Example
He saddled the horse before going for a ride.
A1 conjunction /ɪf/

if

Meaning
used to introduce a condition or supposition
Example
If it rains tomorrow, we will stay home.
C1 adjective /ʌnˈsəʊʃəl/

unsocial

Meaning
not enjoying the company of others; avoiding social interaction; contrary to social norms
Example
He prefers unsocial hours so he can work alone without interruptions.
C1 noun /ˈskruːpəl/

scruple

Meaning
A moral or ethical consideration that restrains actions.
Example
He had no scruples about lying to get ahead.
B2 verb /pərˈsiːv/

perceive

Meaning
to become aware of or understand something through the senses
Example
I perceive a change in his attitude.
C1 adjective /ˈpæl.ɪd/

Pallid

Meaning
pale, especially because of poor health; lacking substance or vitality
Example
His pallid complexion showed signs of illness.
C2 noun ˈnjʊə.rəʊ ˌfiːd.bæk

neurofeedback

Meaning
A technique that uses real-time displays of brain activity to teach self-regulation of brain function.
Example
Neurofeedback enhances cognitive performance and relaxation.
B2 adjective /ˈsændi/

Sandy

Meaning
covered with sand; containing sand; having the texture of sand
Example
The sandy beach stretched for miles along the coast.
C1 noun /saɪð/

scythe

Meaning
A tool with a long curved blade used for cutting grass or grain.
Example
The farmer sharpened his scythe before harvesting the wheat.
B2 noun ˌkɒn.stɪˈtjuː.ʃən

constitution

Meaning
A body of fundamental principles or established precedents according to which a state is governed.
Example
Constitutional reforms ensure equity.
C1 verb /strʌt/

strut

Meaning
to walk with a stiff, proud, and confident gait, often to show off
Example
He strutted across the stage after winning the award.
C2 noun /dɪˈkrɛpɪˌtjuːd/

decrepitude

Meaning
the state of being old, weak, and worn out
Example
The once-great empire fell into decrepitude.
C1 adjective /prɪˈtɛnʃəs/

pretentious

Meaning
Attempting to impress by affecting greater importance, talent, culture, etc., than is actually possessed.
Example
The restaurant was stylish but far too pretentious for my taste.
C2 noun /ˈɛksplətɪv/

expletive

Meaning
a word or phrase used as an exclamation, often offensive or profane
Example
He shouted an expletive when he dropped the hammer on his foot.
C2 noun /ˈfrɛs.koʊ/

fresco

Meaning
A painting done rapidly in watercolor on wet plaster so that the colors penetrate the surface
Example
The church walls were decorated with beautiful frescoes.
C2 verb /ˈɡɑːɡəl/

goggle

Meaning
to stare with wide open eyes, often in surprise or wonder
Example
The tourists goggled at the tall skyscrapers.
C2 adjective /ˈnɔɪ.səm/

Noisome

Meaning
having an extremely offensive smell; harmful or unpleasant
Example
The noisome smell from the garbage made everyone cover their noses.
C1 noun (plural) /kwɑːmz/

qualms

Meaning
feelings of doubt, worry, or uneasiness
Example
He had serious qualms about accepting the offer.
C2 verb /ˈpɛrəɡrɪˌneɪt/

peregrinate

Meaning
To travel or wander from place to place.
Example
He loved to peregrinate across the countryside during summer.
C2 verb /bɪˈfaʊl/

befoul

Meaning
to make dirty or polluted; to disgrace or corrupt
Example
The factory waste befouled the river.
C1 adjective /dɪˈmɪnjətɪv/

diminutive

Meaning
extremely or unusually small
Example
Despite his diminutive size, he was a powerful leader.
B1 adjective /ˈlaɪv.li/

Lively

Meaning
full of life and energy; animated; cheerful
Example
The children had a lively discussion about their favorite books.
C1 noun ˌsɛn.trə.laɪˈzeɪ.ʃən

centralization

Meaning
The concentration of control and decision-making power in a central authority.
Example
Excessive centralization can slow down decision-making.
B2 noun ˈjuːnəti

unity

Meaning
The state of being united or joined as a whole.
Example
Unity among people led to victory.
C1 verb /wɪlt/

wilt

Meaning
To become limp, weak, or drooping, often due to lack of water or energy.
Example
The flowers wilted in the heat of the sun.
A2 pronoun /huːz/

whose

Meaning
used to ask or talk about the person or thing that owns something
Example
The girl whose phone was stolen is my cousin.
C1 verb /ˈkwɪkən/

quicken

Meaning
to make or become faster; to accelerate
Example
His pulse began to quicken as he approached the finish line.
C1 noun /ɪnˈvɜːrʒən/

inversion

Meaning
A reversal of the normal order, position, or relationship.
Example
In poetry, inversion is often used to create emphasis.
C1 adjective /ˈtɔːrtʃərəs/

torturous

Meaning
Extremely painful or causing great suffering; relating to or involving torture.
Example
The journey through the desert was long and torturous.
B2 noun ˈsæt.əl.aɪt

satellite

Meaning
An artificial object which has been intentionally placed into orbit around a celestial body.
Example
Satellites provide critical data for research.
A2 noun /vjuː/

View

Meaning
the ability to see something; a particular way of considering or regarding something; an opinion
Example
The mountain view from our hotel room was breathtaking.
C2 verb /ʌnˈjoʊk/

unyoke

Meaning
To release from a yoke or to free from restraint or obligation.
Example
The farmer unyoked the oxen after a long day of work.
C2 noun /kəˈrɒn.də/

Karonda

Meaning
a small dark purple berry-like fruit that is sour and used in pickles
Example
Karonda is often used to make pickles and preserves.
B2 adverb /ˌɪndəˈrɛktli/

indirectly

Meaning
in a way that is not direct; through an intermediate means or influence
Example
The policy affected small businesses indirectly.
A1 pronoun /ˈsʌmwʌn/

someone

Meaning
a person, but not specifically known or named
Example
Someone left their umbrella in the hallway.
C1 adverb /ˈhɑr.tɪ.li/

Heartily

Meaning
in a sincere and enthusiastic manner; wholeheartedly
Example
She heartily welcomed her guests to the party.
C2 noun /ˈbroʊmiːn/

bromine

Meaning
a dark red, dense, toxic liquid element used in making dyes, flame retardants, and medications
Example
Bromine is commonly used in water treatment chemicals.
C2 adjective /ˈbɔːlki/

balky

Meaning
difficult, uncooperative, or stubborn
Example
The balky printer refused to work when needed most.
C2 noun /ˈjuːər/

ewer

Meaning
a large jug with a wide mouth, especially used in the past for carrying water
Example
The servant filled the ewer with fresh water.
B2 noun /dʒiˈɒl.ə.dʒi/

geology

Meaning
the science that deals with the Earth's physical structure and substances
Example
She studied geology to understand earthquakes.
C2 noun /ˈɪndələns/

indolence

Meaning
Avoidance of activity or exertion; laziness.
Example
His indolence kept him from finishing the project on time.
C1 adjective /ˈspɛktrəl/

spectral

Meaning
Relating to a ghost or specter; ghostly. Also relating to a spectrum.
Example
The old mansion had a spectral atmosphere at night.
B1 noun /ˌsæt.ɪsˈfæk.ʃən/

Satisfaction

Meaning
fulfillment of one's wishes, expectations, or needs
Example
She felt great satisfaction after completing the project.
C1 noun /ˈfiːtəs/

fetus

Meaning
an unborn or unhatched offspring in the womb or egg
Example
The doctor explained the development of the fetus during pregnancy.
A2 noun /ˈbʊkʃɒp/

bookshop

Meaning
a retail store where books are sold
Example
She spent an hour browsing in the small bookshop.
B2 noun /ɡreɪn/

Grain

Meaning
wheat or any other cultivated cereal crop used as food; a single seed of a cereal
Example
The farmer stored large quantities of grain in the barn after the harvest.
B2 verb /ˌriːˈbɪld/

rebuild

Meaning
to build something again after it has been damaged or destroyed
Example
The villagers worked together to rebuild the bridge after the flood.
B2 adjective /ˈʌt.moʊst/

Utmost

Meaning
greatest; most extreme; maximum possible
Example
She showed utmost care while handling the fragile items.
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 noun /ˈdʒiː.ni.əs/

Genius

Meaning
exceptional intellectual or creative power or other natural ability; a person who has such ability
Example
Einstein was recognized as a genius for his groundbreaking contributions to physics.
C1 noun /ˌsʌb.stɪˈtjuː.ʃən/

substitution

Meaning
the action of replacing someone or something with another
Example
The substitution of the old system with the new one was difficult.
B2 noun/adjective /ˈbʌmpər/

bumper

Meaning
A protective bar at the front or back of a vehicle; also used to describe something unusually large or successful.
Example
The farmer celebrated a bumper harvest this year.
B1 adjective /ˈsæt.ɪs.fæk.tər.i/

Satisfactory

Meaning
acceptable; meeting requirements; adequate
Example
The test results were satisfactory.
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.
C2 verb /lɔːd/

laud

Meaning
To praise someone or something highly, especially in public.
Example
The critic lauded the actor's performance as a masterpiece.
C2 noun /ɡaɪl/

guile

Meaning
Cleverness or cunning used to achieve a goal, often in a deceptive way
Example
He used guile to win the negotiation.
B2 adjective; verb (past and past participle) /lɜːrnd/

learned

Meaning
having acquired much knowledge through study; gained knowledge or skill through experience or teaching
Example
She is a learned scholar with deep knowledge of history.
C2 noun /nɪb/

nib

Meaning
the pointed end of a pen used for writing or drawing
Example
He dipped the nib into the ink before writing.
B1 noun ˈseʃən

session

Meaning
A meeting of an official body, especially a legislature, council, or court of law, to conduct its business.
Example
The session was held on February 25.
B1 noun /tɜːm/

term

Meaning
a word or phrase used to describe a thing or to express a concept
Example
The term 'machine learning' is commonly used in technology.
B2 verb, noun, adjective /prɑːmpt/

prompt

Meaning
To cause someone to take action; done without delay.
Example
His speech prompted the audience to ask questions.
C2 adverb /əˈmʌk/

amok

Meaning
Behaving uncontrollably and disruptively.
Example
The angry mob ran amok after the verdict was announced.
C1 adjective /sɪˈnɒnɪməs/

synonymous

Meaning
having the same or nearly the same meaning; closely associated with something
Example
For many people, her name is synonymous with generosity.
A2 noun /ˈfiːtʃər/

feature

Meaning
a distinctive attribute or aspect of something; a characteristic
Example
The new phone has a unique camera feature.
A1 verb /send/

send

Meaning
to cause something to go or be taken to a particular destination; to transmit
Example
I will send you an email with the details.
B2 adjective /bliːk/

bleak

Meaning
cold, miserable, or without hope
Example
The future seemed bleak after the economic downturn.
C2 verb /ˌriː.kəˈnɔɪ.tər/

reconnoiter

Meaning
to make a preliminary inspection or survey, especially of an area for military or strategic purposes
Example
The soldiers reconnoitered the area before advancing.
C1 adjective /ˈed.jʊ.keɪ.tɪv/

Educative

Meaning
providing education; instructive; informative
Example
The documentary was highly educative and informative.
B1 adjective ɪkˈstriːm

extreme

Meaning
Reaching a high or the highest degree; very great.
Example
Extreme weather patterns disrupt ecosystems.
B2 noun /dɪsˈmeɪ/

Dismay

Meaning
concern and distress caused by something unexpected; consternation or alarm
Example
To our dismay, the concert was cancelled due to severe weather conditions.
C1 noun

Longitude

B2 noun /ˈbrɔːdˌkæstər/

broadcaster

Meaning
a person or organization that transmits a broadcast program.
Example
The broadcaster aired the match live to millions of viewers.
C2 verb /əˈniːl/

anneal

Meaning
To heat and cool metal or glass to make it stronger or less brittle.
Example
The blacksmith annealed the steel to improve its durability.
B1 verb /rɪˈdʒekt/

reject

Meaning
to refuse to accept or consider something
Example
The committee decided to reject the proposal.
C1 adjective /rɪˈtɜː.nə.bəl/

Returnable

Meaning
able to be returned or given back
Example
The bottle is returnable for a deposit refund.
C1 noun /ˈen.mə.ti/

Enmity

Meaning
a state or feeling of active opposition or hostility
Example
The enmity between the two families lasted for generations.
C2 noun /ˌmɛɡələˈmeɪniə/

megalomania

Meaning
A condition characterized by delusional fantasies of power, wealth, or omnipotence.
Example
The dictator’s megalomania led him to believe he was invincible.
B2 noun /ˈpaɪ.θən/

Python

Meaning
a large non-venomous snake that kills prey by constriction
Example
The python wrapped around its prey tightly.
C1 noun /pəˈræl.ə.sɪs/

Paralysis

Meaning
the loss of the ability to move part or all of the body; complete inability to act or function
Example
The accident left him with paralysis in his legs.