spherometer
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C2 noun /sfɪˈrɒmɪtər/

spherometer

Meaning
An instrument used for measuring the curvature of spherical surfaces.
Example
The scientist used a spherometer to measure the lens curvature.
C1 noun /ˈzoʊdiæk/

Zodiac

Meaning
a belt of the heavens within which lie the paths of the sun, moon, and planets; the twelve astrological signs
Example
What is your zodiac sign?
C2 adjective /ˌɪnfəˈlɪsɪtəs/

infelicitous

Meaning
not suitable or well chosen; awkward or unfortunate
Example
His infelicitous remark ruined the atmosphere of the meeting.
C2 adjective /ˌækwiˈɛsənt/

acquiescent

Meaning
ready to accept something without protest, or to do what someone else wants
Example
He gave an acquiescent smile and agreed to the plan.
A2 adjective /səkˈsɛsfəl/

Successful

Meaning
having achieved a desired aim or result; prosperous
Example
She was successful in her career as a doctor.
A2 verb /roʊl/

roll

Meaning
to move by turning over and over on an axis
Example
She rolled the ball down the hill.
A2 noun /nɔɪz/

Noise

Meaning
a sound, especially one that is loud or unpleasant
Example
The noise from the construction site was very disturbing.
C1 verb /dɪˈsɛm.ɪ.neɪt/

disseminate

Meaning
To spread or give out something, especially news, information, ideas, etc., to a lot of people.
Example
Social media helps to disseminate information quickly.
C1 noun/verb ˈfɒr.ɪdʒ

forage

Meaning
Food for horses and cattle, especially dried hay or feed; to search for food.
Example
Animals forage for food during the winter months.
B2 verb /kənˈstreɪn/

constrain

Meaning
to limit or restrict someone or something; to force or compel
Example
The new regulations constrain businesses from polluting the environment.
C2 noun /ɪˈfjuːʒən/

effusion

Meaning
An unrestrained outpouring of words, feelings, or emotions.
Example
His letter was an effusion of love and longing.
C2 noun /ˈænti/

ante

Meaning
a stake put up by a player in poker or similar games before receiving cards; also used figuratively to mean an initial investment or contribution
Example
Each player placed an ante before the game began.
B2 adjective /ɪˈmens/

Immense

Meaning
extremely large or great; huge
Example
The immense mountain range stretched across the horizon.
C2 adjective /droʊl/

droll

Meaning
curious or unusual in a way that provokes dry amusement
Example
He had a droll sense of humor that made everyone laugh.
C2 adjective /ˈstɒlɪd/

stolid

Meaning
Calm, dependable, and showing little emotion or animation.
Example
Despite the chaos around him, he remained stolid and composed.
C2 noun /ˈæntiruːm/

anteroom

Meaning
A small room leading to a main one, often used as a waiting area.
Example
The guests waited in the anteroom before being called inside.
A2 adjective /ˈrɪtən/

written

Meaning
expressed in writing rather than spoken; composed or recorded in written form
Example
The agreement must be in written form to be valid.
C1 adjective /rɪˈpɛlənt/

repellent

Meaning
Able to drive away something, especially insects or unpleasant things; causing disgust or distaste.
Example
This cream is highly effective as a mosquito repellent.
C1 adjective /daɪər/

Dire

Meaning
extremely serious; urgent; terrible
Example
The country is facing a dire economic crisis.
C2 adjective /ˈvɜːrnəl/

vernal

Meaning
related to spring; fresh, youthful
Example
The garden was filled with vernal beauty after the long winter.
B1 verb /splɪt/

split

Meaning
to divide or separate into parts or groups
Example
He split the log in two with an axe.
C1 noun/adjective /fɔːrˈboʊdɪŋ/

foreboding

Meaning
A feeling that something bad will happen; ominous.
Example
She felt a deep sense of foreboding as she entered the abandoned house.
B2 noun /ˈhʌrɪkən/

hurricane

Meaning
A violent tropical storm with very strong winds and heavy rain.
Example
The hurricane destroyed hundreds of homes along the coast.
C2 noun /ˈprɪvɪti/

privity

Meaning
A close, private, or special relationship; in law, the direct connection between parties to a contract.
Example
There was no privity of contract between the supplier and the customer.
B1 noun /naɪt/

Knight

Meaning
a man given a rank of honor by a British king or queen; a medieval warrior on horseback
Example
The brave knight rescued the princess from the dragon's castle.
B1 noun ˈklaɪ.mət tʃeɪndʒ

climate change

Meaning
A change in global or regional climate patterns, attributed largely to the increased levels of atmospheric carbon dioxide produced by the use of fossil fuels.
Example
Climate change is causing more natural disasters.
B2 noun /jel/

Yell

Meaning
a loud, sharp cry of pain, surprise, or delight; to shout loudly
Example
He let out a yell when he saw the spider.
B1 noun ɡreɪt wɔːl əv ˈtʃaɪ.nə

Great Wall of China

Meaning
A massive ancient fortification system in China, built to protect against invasions and considered one of the most famous landmarks in the world.
Example
The Great Wall of China is one of the most famous landmarks in the world.
B2 noun ˌrɛvəˈluːʃən

revolution

Meaning
A forcible overthrow of a government or social order, in favor of a new system.
Example
The story is set during the French Revolution.
A2 noun /ˈkaʊ.bɔɪ/

Cowboy

Meaning
a man who tends cattle on a ranch, especially in the western United States
Example
The cowboy rode his horse across the vast prairie to find the cattle.
C2 noun /ɪˈnænɪti/

inanity

Meaning
a nonsensical remark or action; silliness; emptiness
Example
The speech was full of inanities that bored the audience.
C1 adjective /ɪnˈkwɪzɪtɪv/

inquisitive

Meaning
Curious or eager to learn and ask questions.
Example
The inquisitive child asked endless questions about the stars.
C2 noun /kɒŋk/

Conck

Meaning
a shell, especially a large spiral one used as a horn or for decoration
Example
The priest blew the conch shell to signal the start of the ceremony.
B2 noun plɒt

plot

Meaning
The main story of a piece of writing, or the series of events that happen in it.
Example
The plot of A Tale of Two Cities is intense and gripping.
B2 adjective /ˈaɪ.dəl/

Idle

Meaning
lazy; inactive; not working or being used
Example
The factory workers were idle during the strike.
C1 noun /ˈvælər/

valor

Meaning
Great courage in the face of danger, especially in battle.
Example
The soldier was honored for his valor during the war.
C2 adjective /ˈsɪbɪlaɪn/

sibylline

Meaning
Prophetic, mysterious, or cryptic in meaning.
Example
The old woman gave a sibylline warning about the future.
A2 noun /ˈtɜːrtl/

turtle

Meaning
A slow-moving reptile with a hard shell that lives in water or on land
Example
The turtle slowly crossed the sandy beach.
C1 noun /ˈvɔːrtɛks/

vortex

Meaning
A mass of whirling fluid or air, especially a whirlpool or whirlwind.
Example
The plane was caught in a dangerous vortex of air.
C1 noun /ˈrəʊ.bɒt əˈsɪs.tɪd prəˈsiː.dʒərz/

robot-assisted procedures

Meaning
Medical operations performed with the help of robotic systems to enhance precision and control.
Example
Robot-assisted procedures reduce human error.
B2 noun ˈæp.ə.taɪt

appetite

Meaning
A natural desire to satisfy a bodily need, especially for food.
Example
Junk food increases appetite unnaturally.
B2 verb /kənˈfɜːr/

confer

Meaning
to discuss something important or to grant or bestow something
Example
The committee will confer to decide on the new policy.
C2 adjective /kəˈkɒfənəs/

cacophonous

Meaning
Producing a harsh, discordant mixture of sounds.
Example
The cacophonous sounds of the city kept her awake all night.
C1 noun /ˈoʊvərˌtʊr/

overture

Meaning
An introduction to something more substantial; a proposal or preliminary action.
Example
The peace overture was welcomed by both nations.
C2 noun /ˈʃæd.ək/

Shaddock

Meaning
a large citrus fruit similar to grapefruit; pomelo
Example
The shaddock is the largest citrus fruit in the world.
C1 adjective /sɔɪld/

soiled

Meaning
dirty or stained; not clean
Example
His clothes were soiled after playing in the mud.
A2 noun /ˈtaɪ.ɡər/

Tiger

Meaning
a very large solitary cat with a yellow-brown coat striped with black, native to the forests of Asia
Example
The tiger hunted silently through the jungle.
C2 noun /kəˈnaɪ.vəns/

connivance

Meaning
the act of secretly allowing or being involved in wrongdoing
Example
The theft happened with the connivance of the security guard.
B1 adjective ˈɪnəveɪtɪv

innovative

Meaning
Featuring new methods; advanced and original
Example
Innovative strategies are required to combat pollution.
A2 determiner/adjective /ˈfjuːər/

fewer

Meaning
a smaller number of; not as many
Example
Fewer people attended the meeting than expected.
B1 noun /ˈfɛloʊ/

fellow

Meaning
a person who shares a common situation, interest, or activity with another
Example
He is a fellow student in my class.
B1 noun /ˈhaɪdʒiːn/

hygiene

Meaning
Conditions or practices conducive to maintaining health and preventing disease.
Example
Good hygiene is essential for preventing the spread of infections.
C1 noun /ˈskwɒlər/

squalor

Meaning
the state of being extremely dirty and unpleasant, especially due to poverty or neglect
Example
They lived in squalor without basic facilities.
A2 adjective /ˈhɛl.θi/

healthy

Meaning
Good physical and mental condition, free from disease or illness.
Example
Regular exercise and a balanced diet keep the body healthy.
C1 verb /kliːv/

cleave

Meaning
to split or divide; to cut through forcefully
Example
He used an axe to cleave the wood.
C1 verb /ˈɡɑːbəl/

gobble

Meaning
to eat something quickly and greedily
Example
The children gobbled their food in minutes.
C2 adjective /ɡrɪˈɡɛəriəs/

gregarious

Meaning
Fond of company; sociable.
Example
She is a gregarious person who loves meeting new people.
B1 noun /kluː/

clue

Meaning
a piece of evidence or information used in the detection of a crime or solving a puzzle
Example
The detective found a clue near the window.
C1 noun /ˌmælnuːˈtrɪʃən/

Malnutrition

Meaning
Lack of proper nutrition; poor nourishment
Example
Malnutrition among children is a serious public health concern.
C1 noun /ˈfæm.ɪn/

Famine

Meaning
extreme scarcity of food; a period when food is extremely scarce
Example
The severe drought led to widespread famine in the region.
C1 noun /hɪˈpɑː.krə.si/

Hypocrisy

Meaning
the practice of claiming to have moral standards that one does not actually possess; insincerity
Example
His hypocrisy was exposed when he criticized others for the same mistakes he had made.
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 noun /krɛst/

crest

Meaning
the top of a hill, wave, or mountain; a symbol of identity
Example
The hikers reached the crest of the mountain at sunrise.
C1 adjective /dɪˈsɜːrnɪŋ/

discerning

Meaning
having good judgment or insight; able to distinguish well
Example
He is a discerning reader who notices subtle details.
C2 adjective /ˈsmɑːrmi/

smarmy

Meaning
Excessively flattering or ingratiating, often insincerely.
Example
The salesman gave a smarmy pitch that felt fake.
B2 noun ˌɜːbənaɪˈzeɪʃən

urbanization

Meaning
The process by which towns and cities are formed and become larger as more people begin living and working in central areas.
Example
Urbanization leads to more developed infrastructure.
C2 noun /ˌspoʊliˈeɪʃən/

spoliation

Meaning
The act of destroying or ruining something, often evidence or property.
Example
The court punished the company for the spoliation of evidence.
C1 noun /ˌspɒn.təˈneɪ.ɪ.ti/

spontaneity

Meaning
The quality of being spontaneous; natural and unplanned behavior.
Example
His spontaneity makes him a great conversationalist.
A2 adjective/adverb /ˈdeɪli/

daily

Meaning
happening every day
Example
She reads the newspaper daily.
C2 noun /ɪmˌprɒb.əˈbɪl.ə.ti/

Improbability

Meaning
the quality or state of being improbable; unlikely to be true or to happen
Example
The improbability of winning the lottery twice didn't stop her from buying tickets.
C1 noun /wæɡ/

Wag

Meaning
a humorous or playful person; someone who enjoys joking around
Example
The class wag always made everyone laugh with his clever jokes.
C2 adjective /ˌʌnɪkˈsɛpʃənəbl/

unexceptionable

Meaning
Not open to objection; acceptable and unobjectionable
Example
His behavior was unexceptionable throughout the event.
C2 noun /əˌɡlɒməˈreɪʃən/

agglomeration

Meaning
A mass or collection of things, sometimes clustered together.
Example
The city is an agglomeration of diverse cultures and communities.
C2 verb /bɪˈleɪ/

belay

Meaning
to secure a rope by winding it around an object; to stop or cancel an order (nautical/military use)
Example
The climber asked his partner to belay the rope tightly.
B1 noun /ˈkɑːr.pən.tər/

Carpenter

Meaning
a person who makes and repairs wooden objects and structures
Example
The carpenter built a beautiful wooden cabinet for the kitchen.
C1 verb /dɪˈspɛns/

dispense

Meaning
To distribute or provide something, especially in portions.
Example
The machine dispenses clean drinking water.
A1 verb /biː/

be

Meaning
To exist, to occur, or to have a particular quality.
Example
She wants to be a doctor.
A1 preposition /ɒn/

on

Meaning
physically in contact with and supported by a surface
Example
The book is on the table.
C2 adjective /ˌɪndɪˈvɜːrtɪbəl/

indivertible

Meaning
Not able to be turned aside or diverted.
Example
The judge's indivertible attention was on the case.
B1 noun /rɪˈspɒns/

Response

Meaning
a reaction to something; an answer or reply; the way in which something reacts to external stimulus
Example
The government's response to the crisis was swift and decisive.
C2 noun /ˈɜːrtʃɪn/

urchin

Meaning
a mischievous or poorly dressed child, often from the streets
Example
The ragged urchins played by the riverbank.
C2 adjective /ˈəʊ.dər.əs/

Odorous

Meaning
having a strong smell; fragrant; aromatic
Example
The garden was filled with odorous flowers.
B2 adjective /ʌnˈhɜːd/

Unheard

Meaning
not heard or listened to; not given a hearing; unknown or unfamiliar
Example
His complaints went unheard by the management.
B2 noun /ˈtrænskrɪpt/

transcript

Meaning
a written or printed version of material originally presented in another medium
Example
The professor asked for a transcript of the meeting.
A1 pronoun /ˈɛnɪθɪŋ/

anything

Meaning
any object, event, or matter; whatever thing
Example
You can ask me anything about the project.
B1 noun /ɪˈlɛktrɪk ˈkɛtəl/

Electric Kettle

Meaning
An electrical appliance that heats water quickly using electricity
Example
The electric kettle automatically turns off when the water starts boiling.
C1 noun ˈsʌs.tɪ.nəns

Sustenance

Meaning
Food or support necessary for sustaining life
Example
Water is essential for human sustenance.
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.
C2 verb /ʃʌk/

shuck

Meaning
To remove the outer covering, such as the husk of corn or shell of shellfish.
Example
She learned how to shuck oysters quickly.
B2 noun /ˈkʌvərɪdʒ/

coverage

Meaning
The extent or scope of something, such as insurance protection or media reporting.
Example
The news channel provided extensive coverage of the event.
B2 verb /ˈdæzəl/

dazzle

Meaning
to impress deeply or blind with brilliance or skill
Example
The magician's tricks dazzled the audience.
B2 noun noʊˈbel praɪz

Nobel Prize

Meaning
Any of six international prizes awarded annually for outstanding work in physics, chemistry, physiology or medicine, literature, economics, and the promotion of peace.
Example
Nobel Prize recognition evaded Bose's contributions.
B2 noun ˈæsɛt

asset

Meaning
A useful or valuable thing, person, or quality.
Example
Real estate is one of the most valuable assets.
A1 noun /bæk/

Back

Meaning
the rear surface of the human body from the shoulders to the hips; the spine
Example
She hurt her back while lifting heavy boxes.
C2 adjective /dæŋk/

dank

Meaning
unpleasantly damp and cold
Example
The basement was dark and dank, filled with a musty smell.
B2 verb /ˈmɑːdərət/

moderate

Meaning
to make less extreme or intense; to control or preside over
Example
She moderated the heated debate between the candidates.
C1 noun /ˈpɛs.tɪ.saɪd ˈrɛz.ɪ.djuː/

pesticide-residue

Meaning
Chemical remnants left over from pesticides used on crops or in soil.
Example
Excess pesticide-residue in food can be harmful to health.
B2 verb /ɪˈveɪd/

evade

Meaning
To escape or avoid something, especially by cleverness or trickery.
Example
He tried to evade the question by changing the subject.
B1 noun ɡrəʊθ

Growth

Meaning
The process of increasing in physical size, number, value, or strength.
Example
Economic growth improves living conditions.
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 verb /dʒɒt/

jot

Meaning
to write something quickly and briefly
Example
She jotted down his phone number on a napkin.
B2 noun /dɪsˈrʌp.ʃən/

disruption

Meaning
Barrier or interruption, sudden disturbance in any process or service.
Example
The road construction caused major disruption in traffic flow.
C1 noun /ˈpæŋkriəs/

pancreas

Meaning
A gland in the abdomen that produces insulin and digestive enzymes.
Example
The pancreas plays a vital role in digestion and blood sugar regulation.
B2 noun /ˈsɛm.iˌsɜːr.kəl/

semicircle

Meaning
Half of a circle or something shaped like half of a circle.
Example
The students sat in a semicircle around the teacher.
B2 noun /ˈsɛmɪˌtɛri/

cemetery

Meaning
a place where dead people are buried
Example
The old cemetery is located at the edge of the village.
A1 pronoun /jɔːrˈsɛlf/

yourself

Meaning
used to refer to the person being addressed, often for emphasis or reflection
Example
You should look after yourself.
C1 adjective /ˈɡʌsti/

gusty

Meaning
characterized by strong, sudden bursts of wind
Example
It was a cold, gusty day by the sea.
B2 adjective, noun /ˈsaɪkɪk/

psychic

Meaning
relating to the mind or supernatural powers; a person claiming to have extrasensory abilities
Example
The psychic claimed she could predict the future.
C1 verb /ˈmʌd.əl/

muddle

Meaning
to mix things up in a confused way or to make a mess of something
Example
He muddled the papers and couldn’t find the report.
C1 adverb /ˈhed ɑn/

Head-on

Meaning
directly facing; in direct confrontation or collision
Example
The two cars collided head-on at the intersection.
B1 noun ˌdemənˈstreɪʃənz

demonstrations

Meaning
The action or process of showing the existence or truth of something by giving proof or evidence.
Example
Demonstrations occurred on March 11.
A2 noun /ˈheəkʌt/

haircut

Meaning
the act or style of cutting hair
Example
I got a haircut before the wedding.
C2 noun /ˈbʌɡəˌbuː/

bugaboo

Meaning
An object of fear or worry; an imagined cause of anxiety.
Example
The threat of inflation became a political bugaboo.
C1 adjective /tænˈdʒɛnʃəl/

tangential

Meaning
relating to or along a tangent; slightly or indirectly related to something
Example
His remarks were tangential to the main topic of discussion.
C2 noun /dʒɛˌstɪkjʊˈleɪʃən/

gesticulation

Meaning
a gesture, especially a dramatic one, used instead of speaking or to emphasize speech
Example
His speech was full of passionate gesticulations.
B2 noun /ˈhɔːrmoʊn/

hormone

Meaning
a chemical substance produced in the body that influences how the body grows or functions
Example
Insulin is a hormone that controls blood sugar levels.
B1 noun /ˈseɪ.ɪŋ/

Saying

Meaning
a well-known phrase that expresses something true about life; a proverb
Example
There's an old saying that practice makes perfect.
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.
A2 noun /ˈfɜːrnɪtʃər/

furniture

Meaning
Objects such as chairs, tables, beds, or cupboards used to make a room suitable for living or working.
Example
The living room was filled with beautiful wooden furniture.
C2 noun /ˌɒktədʒəˈnɛəriən/

octogenarian

Meaning
A person who is between 80 and 89 years old.
Example
The octogenarian still jogs every morning to stay healthy.
A2 noun /pæθ/

path

Meaning
a way or track laid down for walking or made by continual treading
Example
She walked along the narrow path through the forest.