octagon
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C1 noun /ˈɒktəɡən/

octagon

Meaning
A polygon with eight sides and eight angles.
Example
The stop sign is shaped like an octagon.
B1 adjective /ˌstreɪtˈfɔːwəd/

straightforward

Meaning
easy to understand or do; simple
Example
Her explanation was straightforward and clear.
B2 adjective /ɪnˈfɔːrmətɪv/

Informative

Meaning
giving or providing useful information; educational; instructive
Example
The documentary was very informative and educational.
C1 noun /ˌædʒ.ɪˈteɪ.ʃən/

agitation

Meaning
a state of nervousness, excitement, or unrest; or action of stirring up public concern
Example
There was visible agitation among the crowd.
C2 adjective /ˈɑːbdjʊrət/

obdurate

Meaning
Stubbornly refusing to change one's opinion or course of action.
Example
He remained obdurate despite everyone's pleas.
C2 noun /ˌlæs.əˈreɪ.ʃən/

laceration

Meaning
a deep cut or tear in skin or flesh
Example
He needed stitches for a laceration on his leg.
C1 verb /əbˈstrʌkt/

obstruct

Meaning
to block or hinder progress; to prevent or impede movement
Example
The fallen tree obstructed the road for several hours.
C1 noun /ˈpɒpjʊləs/

populace

Meaning
the general public; the ordinary people living in a country or area
Example
The new law was welcomed by the local populace.
B2 adjective /ɪnˈdjʊər.ɪŋ/

Enduring

Meaning
lasting; permanent; continuing for a long time
Example
Their enduring friendship lasted for decades.
A2 noun /ˈdrɔːər/

drawer

Meaning
a box-shaped storage compartment that slides in and out of furniture
Example
She kept her jewelry in the top drawer of the dresser.
C1 adjective sɪˈlɛstʃəl

celestial

Meaning
Positioned in or relating to the sky, or outer space as observed in astronomy.
Example
The celestial bodies in the sky were clearly visible last night.
B2 noun /ˌkɔːriˈændər/

Coriander

Meaning
aromatic herb with feathery leaves used for flavoring food; also refers to the seeds used as spice
Example
Fresh coriander leaves are sprinkled on top of the curry.
B1 noun /ɪnˈstrʌkʃən/

instruction

Meaning
Detailed information telling how something should be done or operated.
Example
Please read the instruction carefully before using the machine.
C1 adjective /dɪˈbeɪst/

debased

Meaning
having lost quality, value, or moral character
Example
The debased currency lost the trust of the people.
A2 noun /wɪnd/

Wind

Meaning
the natural movement of air, especially in the form of a current of air blowing from a particular direction
Example
The wind blew the leaves off the trees.
C2 adjective /ˈɡɑːrbəld/

garbled

Meaning
Describes speech or text that is distorted or unclear.
Example
The radio broadcast was full of garbled messages.
B1 verb /loʊˈkeɪt/

locate

Meaning
to find the exact position or place of something
Example
They managed to locate the missing keys under the couch.
C2 verb /ˈstɪp.əl/

stipple

Meaning
to cover a surface with numerous small dots or specks, often in drawing or painting
Example
The artist stippled the canvas to create a textured effect.
A1 noun /bɪˈɡɪnɪŋ/

beginning

Meaning
The start or first part of something.
Example
The beginning of the story was very interesting.
C2 noun /ˈsælvoʊ/

salvo

Meaning
A simultaneous discharge of guns or release of bombs; a sudden outburst of cheers or applause.
Example
The soldiers fired a salvo to honor the fallen general.
B2 noun /den/

Den

Meaning
a wild animal's lair or home; a small, comfortable room; a place for illegal activities
Example
The fox disappeared into its den when it sensed danger approaching.
C1 adjective /ɪˈlɪsɪt/

illicit

Meaning
Forbidden by law, rules, or custom.
Example
The police shut down the illicit drug operation.
A2 noun /ˈmɛnjuː/

menu

Meaning
A list of food and drinks available at a restaurant or offered at a meal.
Example
The restaurant updated its menu with new dishes.
B1 noun ˌdʒɛnəˈreɪʃənz

Generations

Meaning
All of the people born and living at about the same time, regarded collectively.
Example
The family tree spans several generations.
C1 noun /əˈlɜːrtnəs/

alertness

Meaning
the state of being mentally aware and quick to notice or respond; vigilance
Example
The driver maintained a high level of alertness during the long journey.
B2 verb /ˌʌndərˈɡoʊ/

undergo

Meaning
to go through something, especially something unpleasant or difficult
Example
She had to undergo surgery to recover.
C1 verb /per/

pare

Meaning
to cut away the outer covering or reduce something gradually
Example
She pared the apple before eating it.
C2 adjective /ˈmʌski/

musky

Meaning
having a strong, sweet, earthy smell like musk
Example
The perfume had a musky fragrance.
B2 verb /ʌnˈkʌvə(r)/

uncover

Meaning
to reveal something that was hidden or secret
Example
The investigation uncovered new evidence.
C1 noun fɔːlt ˈtɒl.ər.əns

fault-tolerance

Meaning
The ability of a system to continue operating properly in the event of the failure of some of its components.
Example
Fault-tolerance ensures dependable systems.
C1 noun /bɑːrb/

barb

Meaning
a sharp projection such as on a fishhook; a cutting remark
Example
The fishhook has a small barb to keep the fish from escaping.
C2 noun /əˈpɒθəˌkɛri/

apothecary

Meaning
A historical term for a person who prepared and sold medicines and drugs.
Example
The village apothecary provided remedies for many common illnesses.
B2 noun /ˈbæŋkrʌpt/

Bankrupt

Meaning
a person unable to pay debts; having no money; completely lacking in something
Example
The company went bankrupt after years of poor financial management.
C2 adjective /ˌɪnkɔːrˈpɔːriəl/

incorporeal

Meaning
lacking a physical body; not composed of matter; intangible
Example
Ghosts are often described as incorporeal beings.
B1 verb /weɪ/

weigh

Meaning
to measure the weight of something; to consider carefully
Example
Please weigh the package before shipping.
C2 adjective /ˌɪnɪkˈstrɪkəbl/

inextricable

Meaning
Impossible to separate or escape from.
Example
The two friends shared an inextricable bond.
B2 verb /ˈtaɪtən/

Tighten

Meaning
to make something more secure or less loose
Example
He tightened the screws to secure the shelf.
C2 adjective /ˈdʒɪg.ərd/

Jiggered

Meaning
surprised or astonished; confused or puzzled
Example
I'll be jiggered if I know what happened here.
B1 noun /ɑːrmz/

Arms

Meaning
weapons and ammunition; firearms
Example
The soldiers carried their arms into battle.
C1 noun /ˌdʒʊə.rɪsˈdɪk.ʃən/

Jurisdiction

Meaning
the official power to make legal decisions and judgments; the extent of this power
Example
This case falls under the jurisdiction of the federal court.
C1 noun /ˌkɒnfləˈɡreɪʃən/

conflagaration

Meaning
This is a common misspelling of 'conflagration', which means a large, destructive fire.
Example
The term 'conflagaration' is often incorrectly used instead of 'conflagration'.
B2 adjective /raɪp/

Ripe

Meaning
fully developed and ready to eat; mature; ready for action or use
Example
The bananas are ripe and ready to eat.
B2 noun /ɪˈkweɪʒən/

equation

Meaning
a mathematical statement that shows the equality of two expressions
Example
He solved the equation to find the value of x.
C2 noun /ˌlɛksɪˈkɒɡrəfər/

lexicographer

Meaning
A person who compiles, writes, or edits dictionaries.
Example
The lexicographer spent years compiling the dictionary.
C1 noun /aɪl/

isle

Meaning
A small island or peninsula, often poetic or literary.
Example
They spent their honeymoon on a beautiful tropical isle.
C2 noun /ɡəˈruːlɪti/

garrulity

Meaning
Excessive talkativeness, especially about trivial matters.
Example
His garrulity made it hard to focus during the meeting.
C2 noun /ˈproʊbɪti/

probity

Meaning
The quality of having strong moral principles; honesty and decency.
Example
The judge was admired for his integrity and probity.
A2 noun, verb /ˈriːzən/

reason

Meaning
A cause, explanation, or justification for an action or event; to think or argue logically.
Example
There is no reason to be upset.
A2 noun /ˈmoʊ.tər ˌsaɪ.kəl/

Motor Cycle

Meaning
a two-wheeled vehicle powered by an engine
Example
He rides his motorcycle to work every day.
C1 noun ˌnæʃ.ən.ə.laɪˈzeɪ.ʃən

nationalization

Meaning
The process of a government taking control of private property or industry.
Example
The nationalization of banks was aimed at stabilizing the economy.
A1 noun /bʌs/

Bus

Meaning
a large motor vehicle carrying passengers by road
Example
I take the bus to work every morning.
C2 adjective /fluːˈɛnʃəl/

fluential

Meaning
Having the power to influence or flowing freely (rare/archaic usage).
Example
The fluential speaker captivated the entire audience.
B2 noun /kəˈmiː.li.ən/

Chameleon

Meaning
a lizard that can change color to match its surroundings
Example
The chameleon changed its color from green to brown.
A1 adjective, adverb, pronoun /moʊst/

most

Meaning
the greatest in amount, degree, or number
Example
Most people like to relax on weekends.
A1 noun /dres/

Dress

Meaning
a piece of clothing for women or girls that covers the body and extends down over the legs
Example
She wore a beautiful blue dress to the party.
C2 noun /ˈæn.dʒi.əʊ.plæs.ti/

angioplasty

Meaning
A medical procedure to open blocked or narrowed blood vessels that supply blood to the heart.
Example
Angioplasty is now safer with robotic assistance.
A1 noun /piːs/

piece

Meaning
a portion or part of something
Example
He gave me a piece of cake.
C2 verb /əbˈhɔːr/

abhor

Meaning
to regard with disgust and hatred
Example
She abhors cruelty to animals.
A2 noun /per/

pair

Meaning
two things of the same kind that are used together
Example
She wore a matching pair of shoes.
B1 noun /ˈkɛmɪstri/

chemistry

Meaning
the branch of science that studies substances and their interactions; also the emotional connection between people
Example
They have great chemistry and work well together.
B1 adjective /ˈfɒɡi/

foggy

Meaning
Full of or covered with fog; unclear or hazy.
Example
The mountain road was dangerous on the foggy morning.
C1 noun /trɔːf/

trough

Meaning
A long, narrow container from which animals eat or drink; also, a low point between waves or in business cycles.
Example
The cows drank water from the wooden trough.
C2 verb /seɪt/

sate

Meaning
To satisfy fully or to excess.
Example
The huge meal sated their hunger after the long journey.
B2 noun /ˌsɛlf əˈwɛə.nəs/

self-awareness

Meaning
Conscious knowledge of one's own character, feelings, motives, and desires.
Example
Self-awareness helps in understanding one's emotions and actions.
B1 adjective /dɪsˈeɪbld/

disabled

Meaning
having a physical or mental condition that limits movements, senses, or activities
Example
The park has special facilities for disabled people.
C2 noun /rɪˈsɪdɪˌvɪzəm/

recidivism

Meaning
The tendency of a convicted criminal to reoffend or relapse into criminal behavior.
Example
The government introduced new programs to reduce recidivism among former inmates.
C1 noun /səˈnɑːtə/

sonata

Meaning
A musical composition for one or more instruments, typically in several movements.
Example
She performed a beautiful Beethoven sonata on the piano.
B2 noun /səbˈskraɪbər/

subscriber

Meaning
a person who receives or subscribes to a service, magazine, or service
Example
She is a subscriber to the monthly magazine.
B2 verb/noun /vɛnt/

vent

Meaning
to release air, gas, or strong emotions; an opening that allows air, gas, or liquid to pass
Example
She vented her frustration after the long meeting.
C1 noun /ˈʃæsi/

chassis

Meaning
the base frame of a vehicle or other wheeled machine
Example
The mechanic examined the car's chassis for damage.
C1 noun /ˈænərkɪst/

anarchist

Meaning
a person who believes in or promotes the absence of government or authority
Example
The anarchist group protested against state control.
C1 noun /ɪkˈstrɛmɪti/

extremity

Meaning
The farthest point or limit of something; a severe or extreme condition.
Example
He was pushed to the extremity of his patience.
B1 adjective /ˌɛdjuˈkeɪʃənl/

educational

Meaning
Relating to the provision of education or having an educative effect.
Example
The journey was an educational experience.
B2 adjective ˌkɒntrəˈdɪktəri

contradictory

Meaning
Mutually opposed or inconsistent; containing elements that oppose each other.
Example
Their views on education are contradictory.
C2 noun /bəˈθɪm.ə.tri/

bathymetry

Meaning
The measurement of depth of water in oceans, seas, or lakes.
Example
Bathymetry is essential for understanding oceanic topography.
C2 noun /ˈniːəˌfaɪt/

neophyte

Meaning
A beginner or novice in a subject, skill, or belief.
Example
As a neophyte in programming, she often asked for guidance from her mentor.
B2 noun /ˈweɪtˌlɪftɪŋ/

weightlifting

Meaning
the sport or activity of lifting heavy weights to build strength and muscle
Example
Weightlifting requires discipline, proper technique, and consistent training.
C2 adjective /ˈfrɒθi/

frothy

Meaning
Full of or covered with small bubbles; light and insubstantial.
Example
She ordered a cup of frothy cappuccino.
B1 noun, adjective, gerund /ˈæk.tɪŋ/

acting

Meaning
the art or profession of performing in plays, films, or television; temporary performance of duties; the process of performing an action
Example
She is studying acting to become a professional actress.
C1 noun /ˈvæntɪdʒ/

vantage

Meaning
a position or situation that gives an advantage or a good view
Example
From this vantage, we could see the entire valley.
C1 noun /ɪˌreɡjəˈlærɪti/

irregularity

Meaning
lack of regularity or consistency; a deviation from what is normal, expected, or orderly
Example
The audit revealed several financial irregularities in the company’s records.
A1 adjective /ˈreɪ.di.əʊ/

radio

Meaning
Relating to radio waves or broadcasting.
Example
FAST is the largest radio telescope in the world.
C1 noun /ˈænəɡræm/

anagram

Meaning
A word or phrase formed by rearranging the letters of another word or phrase.
Example
The word 'listen' is an anagram of 'silent'.
B2 noun məˈmɔːriəl

memorial

Meaning
A structure or building made to remind people of a person or event.
Example
Thousands gather at the National Memorial.
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 /siˈɛrə klʌb/

Sierra Club

Meaning
An American environmental organization founded in 1892 by John Muir, focused on promoting conservation of the natural environment by influencing public policy decisions.
Example
John Muir founded the Sierra Club in 1892 to protect wild areas.
C2 adjective /dɪˈrɒɡətɪv/

derogative

Meaning
Expressing a low opinion or showing lack of respect.
Example
He made a derogative remark about her work.
B1 noun /feɪm/

Fame

Meaning
the condition of being known or talked about by many people
Example
The young actor achieved international fame with his latest movie.
C1 noun /kwoʊ/

quo

Meaning
The existing state of affairs or situation, often used in the phrase 'status quo'.
Example
He wanted to maintain the status quo at work.
C1 noun ˌsɪs.təˈmæt.ɪk ˈstræt.ə.dʒi

systematic strategy

Meaning
A methodical and organized plan or approach to achieve specific objectives.
Example
A systematic strategy was employed to achieve objectives.
A2 adverb /ˈtoʊtəli/

Totally

Meaning
completely; entirely; absolutely
Example
I totally agree with your opinion.
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.
A2 noun /koʊtʃ/

coach

Meaning
A person who helps improve others' skills or knowledge.
Example
The football coach motivated his team before the match.
C1 verb /bɒtʃ/

botch

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

treatise

Meaning
a formal and systematic written work dealing with a subject in detail
Example
He wrote a treatise on modern economic theory.
C1 noun ˌhaɪ.droʊˈpɒn.ɪks

hydroponics

Meaning
Growing plants using nutrient-rich water instead of soil.
Example
Hydroponics allows crops to grow without soil.
B1 noun prəˈtek.ʃən

protection

Meaning
The action of protecting someone or something, or the state of being protected.
Example
The movement focused on the protection of rights.
C2 noun /ˈoʊvərlɔːrd/

overlord

Meaning
A ruler, master, or person of great power and authority over others.
Example
The peasants were forced to pay taxes to their overlord.
C1 noun /ˌrɛkwɪˈzɪʃən/

requisition

Meaning
An official order laying claim to the use of property or materials; a formal demand or request.
Example
The manager submitted a requisition for new office supplies.
B1 verb/adjective /sɪˈkjʊər/

secure

Meaning
to make safe or protect; to fix something firmly in place
Example
Please secure the door before you leave.
A1 pronoun /ðiːz/

these

Meaning
used to refer to things or people that are near or present
Example
These are my friends.
B2 noun /ˌfer.ˈwel/

Farewell

Meaning
an act of parting or of marking someone's departure
Example
The company organized a farewell party for the retiring manager.
C1 noun ɪnˈsɒl.vən.si

insolvency

Meaning
The state of being unable to pay debts owed; bankruptcy.
Example
The company declared insolvency after years of losses.
C1 noun ˈiː.θɒs

ethos

Meaning
The characteristic spirit of a culture, era, or community as manifested in its beliefs and aspirations.
Example
The company's ethos is built on innovation and integrity.
C2 adjective /ʌnˈblʌʃɪŋ/

Unblushing

Meaning
showing no shame or embarrassment; boldly shameless
Example
He told the unblushing lie without any hesitation.
C2 noun /ˈlɔːˌɡɪvər/

lawgiver

Meaning
A person who creates or enforces laws; a legislator.
Example
Moses is often regarded as a great lawgiver in history.
B2 adjective /æʃ ˈkʌl.ər/

Ash-colour

Meaning
a grayish color resembling ash
Example
The old building had ash-colour walls that needed painting.
C2 noun /ˈflæɡ ˌɒfɪsər/

flag-officer

Meaning
a senior naval officer entitled to fly a flag to mark the command
Example
The flag-officer reviewed the fleet before the ceremony.
B2 verb /ˈflʌrɪʃ/

flourish

Meaning
To grow or develop in a healthy or successful way.
Example
Her business began to flourish after she introduced online sales.
B1 verb /ˈwɪspər/

whisper

Meaning
to speak very softly using one's breath without vocal cords
Example
She whispered a secret in my ear.
C2 adverb /ɪnˈdjuːbɪtəbli/

indubitably

Meaning
Without a doubt; certainly.
Example
She is indubitably the best candidate for the job.
C2 noun /ˈplætɪtjuːd/

platitude

Meaning
a remark or statement that is overused and unoriginal
Example
He kept repeating the same platitudes during the speech.
B2 verb /ˌoʊvərˈloʊd/

overload

Meaning
to load with too much weight or cargo; to give too much work or information
Example
Don't overload the washing machine or it might break down.
B1 verb /kənˈvɪns/

convince

Meaning
to make someone believe or feel certain about something
Example
She convinced him to attend the meeting.
C1 adjective /ˈɔːdəˌtɔːri/

auditory

Meaning
Relating to the sense of hearing.
Example
The lecture was designed to enhance students' auditory learning skills.
C1 noun fluˈɪd.ɪ.ti

fluidity

Meaning
The ability of a substance to flow easily; smooth and graceful movement or style.
Example
The fluidity of the dancer's movements was mesmerizing.
B2 adjective /ˈbeə.rə.bəl/

Bearable

Meaning
able to be endured; tolerable; not too unpleasant or painful
Example
The pain became bearable after taking the medicine.
B2 noun /ˈmæt.rəs/

Mattress

Meaning
a large rectangular pad for supporting the reclining body, used as or on a bed
Example
We bought a new mattress for our bedroom.
C2 noun /əˈdɛndəm/

addendum

Meaning
an additional item or piece of information added at the end of a document or book
Example
The report included an addendum with updated statistics.
A2 noun /ˈstʌmək/

Stomach

Meaning
the organ in the body where food is digested; the belly or abdomen
Example
My stomach hurts after eating too much.
A2 noun ækt

act

Meaning
A written law passed by a legislative body.
Example
The act was passed in 2023.