polyhedron
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C2 noun /ˌpɒlɪˈhiːdrən/

polyhedron

Meaning
a solid object with flat polygonal faces, straight edges, and vertices
Example
The mathematician studied a complex polyhedron model.
C1 verb /əˈkrɛdɪt/

accredit

Meaning
to officially recognize, authorize, or approve someone or something
Example
The university is accredited by the national education board.
C1 verb /ˈkwentʃɪŋ/

quenching

Meaning
The act of satisfying thirst or extinguishing something like fire.
Example
Drinking cold water was quenching her thirst.
B2 verb /suːð/

soothe

Meaning
to calm or comfort; to relieve pain or distress
Example
The mother soothed her crying baby with a gentle lullaby.
C2 noun /ræŋˈɡuːn ˈkriːpər/

Rangoon creeper

Meaning
A climbing vine with fragrant flowers that change color from white to pink to red
Example
The Rangoon creeper covered the entire fence with its sweet-smelling flowers.
B2 noun ɪˌvæljuˈeɪʃən

evaluation

Meaning
The making of a judgment about the amount, number, or value of something; assessment.
Example
Accurate evaluation helps determine resource sustainability.
A2 verb /friːz/

freeze

Meaning
to become solid due to cold; to preserve by cold
Example
Water freezes at zero degrees Celsius.
A1 noun /wɜːrd/

word

Meaning
a single distinct meaningful element of speech or writing
Example
He looked up the word in the dictionary.
B2 noun /ˈlɪn.ən/

linen

Meaning
A strong cloth made from the fibers of the flax plant, or items made from this cloth such as sheets or clothing.
Example
She bought new linen curtains for the living room.
C1 noun /səbˈvɜːrʒən/

subversion

Meaning
the act of trying to destroy or undermine an established system or authority
Example
The government accused the rebels of planning subversion.
C2 noun /brɔːn/

brawn

Meaning
physical strength in contrast to intelligence
Example
He used his brawn to lift the heavy box.
C2 verb /pɑːrtʃ/

parch

Meaning
to make something extremely dry, especially by exposure to heat
Example
The scorching sun began to parch the fields.
A1 adjective, adverb, pronoun /mɔːr/

more

Meaning
A greater or additional amount or degree.
Example
She wanted more time to finish the project.
B2 noun /dɪˈpen.dənt/

Dependent

Meaning
a person who relies on another for financial support; someone who depends on others
Example
As a tax dependent, she could not file her own tax return separately.
A2 noun /sməʊk/

smoke

Meaning
A visible suspension of carbon or other particles in air, typically one emitted from a burning substance.
Example
Smoke from vehicles worsens air quality.
C1 noun /ˌɪnˈdɪsəplɪn/

indiscipline

Meaning
lack of discipline or self-control; failure to obey rules or maintain order
Example
Indiscipline among the students disrupted the learning environment.
B2 noun /ˈskriːnɪŋ/

screening

Meaning
the act of examining or testing people to detect disease or evaluate suitability; a showing of a movie or program
Example
The hospital offered free health screening for all employees.
C2 verb /dɪˈdʒɛkt/

deject

Meaning
to make someone feel sad, depressed, or dispirited
Example
The news of his failure seemed to deject him deeply.
C2 verb /rɪˈpruːv/

reprove

Meaning
to criticize or correct someone gently or disapprove of their actions
Example
The teacher reproved the student for being late.
A2 adjective /rɪˈspɒn.sə.bəl/

Responsible

Meaning
accountable; having duties; reliable and trustworthy
Example
Parents are responsible for their children's education and well-being.
A1 noun /ˈtiː.tʃər/

Teacher

Meaning
a person who teaches students in a school or other educational institution
Example
The teacher explained the math problem clearly to the students.
B1 verb /siːl/

seal

Meaning
to close or secure something tightly or officially confirm something
Example
He sealed the envelope before sending the letter.
C2 noun /ˌɛmjʊˈleɪ.ʃən/

emulation

Meaning
Reproducing something or following someone to achieve success.
Example
The software allows the emulation of old video games on modern devices.
C1 adjective /ˌloʊ ˈspɪrɪtɪd/

low-spirited

Meaning
feeling sad, depressed, or lacking enthusiasm
Example
He felt low-spirited after hearing the bad news.
C1 adjective/noun nɪˈmɒn.ɪk

mnemonic

Meaning
Assisting or intended to assist memory; a device or technique to aid memory.
Example
A mnemonic device helps students remember complex concepts.
C2 adjective /ˌɪmpɪˈkjuːniəs/

impecunious

Meaning
Having little or no money; poor.
Example
He grew up in an impecunious family.
B2 noun ˈəʊ.və.hed

overhead

Meaning
Ongoing business expenses not directly attributable to creating a product or service.
Example
The company reduced its overhead to increase profits.
C1 adverb /ˈfeɪ.təl.i/

Fatally

Meaning
in a way that causes death; with deadly consequences; critically
Example
The accident fatally injured two passengers.
B2 adjective /ˈslɒp.i/

Sloppy

Meaning
careless; messy; done without care or attention to detail
Example
His sloppy handwriting was difficult to read.
C2 noun /bəˈfuːn/

buffoon

Meaning
A ridiculous but amusing person; a clown or jester.
Example
He acted like a buffoon at the party, making everyone laugh.
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.
C2 noun /ˌɪrɪˈdɛsəns/

iridescence

Meaning
a play of lustrous, changing colors like those of a rainbow
Example
The butterfly's wings shimmered with iridescence.
B1 noun/verb /wuːnd/

wound

Meaning
an injury to the body or to harm someone
Example
He received a deep wound on his arm.
C2 adjective /luːd/

lewd

Meaning
Sexually offensive, obscene, or vulgar.
Example
He was arrested for making lewd remarks in public.
C1 adjective /ˌsækrɪˈfɪʃəl/

sacrificial

Meaning
Relating to or involving sacrifice.
Example
The lamb was used as a sacrificial offering in the ritual.
C2 noun /ˈkɪzmɛt/

kismet

Meaning
Destiny or fate.
Example
Meeting her on that day felt like pure kismet.
C2 noun /rɪˈpruːf/

reproof

Meaning
An expression of blame or disapproval.
Example
His careless words drew a sharp reproof from his mother.
C1 noun ˌɒb.səˈlɛs.əns

obsolescence

Meaning
The process of becoming obsolete or outdated and no longer used.
Example
The rapid advancement of technology leads to the obsolescence of old devices.
C1 noun /ˈɒn.slɔːt/

onslaught

Meaning
A fierce or destructive attack.
Example
The village faced an onslaught of enemy forces.
B2 noun /kraɪˈtɪəriən/

criterion

Meaning
A standard or rule used to make a judgment or decision.
Example
Honesty is an important criterion for this job.
B1 verb /rɪˈlaɪ/

rely

Meaning
to depend on or trust someone or something
Example
I rely on my friends for support.
C2 adjective /ˌsæpəˈneɪʃəs/

saponaceous

Meaning
Soapy or having the qualities of soap.
Example
The plant has saponaceous leaves that produce foam when rubbed in water.
C1 verb /ˈfɜːr.tɪ.laɪz/

fertilize

Meaning
to make soil or land more fertile by adding substances
Example
Farmers fertilize the fields to increase crop yield.
C2 verb /ɪˈvɪns/

evince

Meaning
to show or demonstrate clearly
Example
She evinced her interest in the project through active participation.
C1 noun /kəˈnɛəri/

canary

Meaning
a small, usually yellow bird known for its singing; also used as a warning sign in dangerous conditions
Example
The canary sang beautifully in its cage.
C1 noun /ˈhɛzɪtənsi/

hesitancy

Meaning
The tendency to pause or delay due to uncertainty or fear.
Example
His hesitancy in answering made everyone doubt his confidence.
B2 noun /ˈfreʃmən/

freshman

Meaning
a first-year student at a high school, college, or university
Example
The freshman felt nervous on his first day at university.
B1 noun /ˈɛnvəloʊp/

envelope

Meaning
a flat paper container used to enclose a letter or document
Example
She sealed the letter in an envelope and posted it.
B2 verb /ˈkɒmprəmaɪz/

compromise

Meaning
To expose or make vulnerable to danger, suspicion, or disrepute.
Example
Excessive sharing can compromise your privacy.
C1 verb /ˈtæmpər/

tamper

Meaning
To interfere with something in a harmful, unauthorized, or improper way.
Example
The evidence was tampered with before the trial.
C2 verb /ˈbæstərdaɪz/

bastardize

Meaning
to corrupt or debase something by altering it from its original form; to change in a way that reduces quality or purity
Example
Critics argue that the remake bastardized the original novel.
A2 noun /koʊt/

Coat

Meaning
an outer garment worn over other clothes for warmth or protection
Example
He put on his winter coat before going outside.
B2 adjective ˌriːprəˈdʌktɪv

reproductive

Meaning
Relating to the reproduction of offspring.
Example
The reproductive cycle of pests can cause rapid infestations.
C1 adjective /rɪˈflek.sɪv/

Reflexive

Meaning
directed back on itself; showing deep thought about oneself
Example
She became more reflexive about her behavior after the feedback.
C1 noun /ˈsɜːrmən/

sermon

Meaning
A religious discourse delivered by a preacher, often offering moral instruction or spiritual guidance.
Example
The pastor gave a moving sermon about compassion and forgiveness.
C1 adjective /ɪnˈɡreɪnd/

engrained

Meaning
Firmly fixed or established; difficult to change.
Example
Cultural practices are often deeply engrained in the fabric of society.
C1 adjective /ˌəʊvərˈstɪmjʊˌleɪtɪd/

overstimulated

Meaning
Excessively excited or aroused, overwhelmed by too much stimulus.
Example
Overstimulated minds can lead to burnout and decreased productivity.
C2 noun /ˈɪkθiəˌsɔːrz/

ichthyosaurs

Meaning
Extinct marine reptiles that resembled fish and dolphins, dominant during the Mesozoic era.
Example
Ichthyosaurs were swift predators of the ancient seas.
C2 noun /ˌɪnədˈvɜːrtəns/

inadvertence

Meaning
Failure to pay attention; carelessness.
Example
The error happened through sheer inadvertence.
B2 noun /əˈmɛnəti/

amenity

Meaning
a useful or pleasant facility or feature of a place
Example
The apartment has every amenity needed for comfortable living.
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 noun /bʊk ˈbaɪn.dər/

Book binder

Meaning
a person whose job is to fasten the pages of books together and put covers on them
Example
The old book binder carefully restored the antique manuscript.
C1 adjective /ˈpriːmə/

prima

Meaning
first or most important; excellent
Example
She was treated as the prima ballerina of the troupe.
A1 noun /dɪˈsɛmbər/

december

Meaning
the twelfth and last month of the year in the Gregorian calendar
Example
December is usually cold in many countries.
B2 noun /ˌep.ɪˈdem.ɪk/

Epidemic

Meaning
a widespread occurrence of an infectious disease in a community
Example
The flu epidemic affected thousands of people across the country.
B1 verb /tɛmpt/

tempt

Meaning
to entice or attract someone to do something, often something wrong or unwise
Example
The smell of fresh bread tempted him to enter the bakery.
C2 noun /ˈbeɪlɔːr/

bailor

Meaning
a person who temporarily transfers possession of goods or property to another under a bailment agreement
Example
The bailor entrusted the valuable artwork to the museum for safekeeping.
C2 adjective /ˈfɛkləs/

feckless

Meaning
lacking initiative or strength of character; irresponsible
Example
His feckless attitude at work caused several missed deadlines.
A2 noun ˈmuːv.mənt

movement

Meaning
A group of people working together to advance their shared political, social, or artistic ideas.
Example
The movement aimed to ensure equal rights.
A2 noun /ˈbiː.ɪŋ/

Being

Meaning
existence; a living creature; the state of existing
Example
Every human being deserves respect and dignity.
C1 adjective /ˈɡɑːrdɪd/

guarded

Meaning
Cautious and careful in speech or action, often to avoid giving too much away.
Example
He gave a guarded reply to the journalist.
A1 adverb /weər/

Where

Meaning
In or to what place or position; used to inquire about location
Example
Where did you put my keys?
C1 adjective /pəˈrɪʒən/

parisian

Meaning
relating to Paris or its people
Example
She wore a Parisian style dress at the party.
A1 noun ækˈtɪv.ɪ.ti

Activities

Meaning
A thing that a person or group does or has done.
Example
Productive activities drive progress.
B2 adjective /ˈɔɪl.i/

Oily

Meaning
covered with oil; containing oil; greasy
Example
Her oily skin needs special care.
B2 adjective /ˈsiː.z ə n.əl/

Seasonal

Meaning
relating to or occurring in a particular season; changing according to the seasons
Example
Many businesses hire seasonal workers during the holidays.
B2 noun ˈæp.ə.taɪt

appetite

Meaning
A natural desire to satisfy a bodily need, especially for food.
Example
Junk food increases appetite unnaturally.
C2 noun /ˈluː.mən/

lumen

Meaning
A unit of luminous flux, measuring the amount of visible light emitted by a source.
Example
The bulb produces 800 lumens of light.
C2 adjective /ɡrɪˈɡɛəriəs/

gregarious

Meaning
Fond of company; sociable.
Example
She is a gregarious person who loves meeting new people.
C2 noun /ˈoʊpiət/

opiate

Meaning
a drug containing opium or its derivatives, used to relieve pain or cause sleep
Example
The doctor prescribed an opiate to relieve the patient's pain.
B2 noun, verb /nɜːrv/

nerve

Meaning
A bundle of fibers in the body that transmits signals between the brain and other parts; also courage or audacity.
Example
She gathered the nerve to speak in front of the large audience.
C1 adjective /məˈlaɪn/

Malign

Meaning
evil in nature or effect; harmful; slanderous
Example
He spread malign rumors about his colleague.
B2 noun ˈekwɪti

equity

Meaning
The value of the shares issued by a company.
Example
Owning equity in a company can yield significant returns.
C1 noun, adjective, verb /səˈbɔːrdənət/ (noun/adjective), /səˈbɔːrdəˌneɪt/ (verb)

subordinate

Meaning
lower in rank or position; to treat as less important
Example
He manages ten subordinates in his department.
C2 noun /ˈhaɪdrə/

hydra

Meaning
a many-headed serpent in Greek mythology; a problem that seems to grow worse when attempts are made to solve it
Example
Corruption is like a hydra, hard to defeat completely.
C2 noun /ˌdaɪ.jʊˈret.ɪk/

diuretic

Meaning
A substance that promotes the production of urine.
Example
Coffee has a mild diuretic effect.
C2 noun /muˈleθi/

Mulethi

Meaning
licorice root, a sweet-tasting herb used in traditional medicine and cooking
Example
She prepared a herbal tea with mulethi to soothe her sore throat.
B2 noun ˌæn.tiˈɒk.sɪ.dənt

antioxidant

Meaning
A substance that may prevent or delay some types of cell damage by neutralizing free radicals.
Example
Green tea contains powerful antioxidants that slow aging.
C1 noun /ˈθʌroʊˌfɛr/

thoroughfare

Meaning
a main road or public highway that goes through a place
Example
The new mall is located along the main thoroughfare.
C2 noun /ˌɪlɪbəˈræləti/

illiberality

Meaning
The quality of being illiberal; lack of tolerance or generosity.
Example
The illiberality of the new laws alarmed the citizens.
B2 noun /ˈməʊtərɪst/

motorist

Meaning
a person who drives a motor vehicle, especially a car or motorcycle
Example
The motorist stopped to help after seeing the accident on the highway.
C2 noun /ˈdɒldrəmz/

doldrums

Meaning
A state of inactivity, stagnation, or low spirits; also a region near the equator with calm winds.
Example
After the project failed, the team was stuck in the doldrums for months.
C2 verb /ˈæsəneɪt/

assonate

Meaning
To correspond or agree in sound, especially by vowel sounds; to rhyme approximately.
Example
The lines assonate beautifully, giving the song a unique flow.
C1 noun /ˈtæn.ə.ri/

tannery

Meaning
A place where animal hides are processed into leather.
Example
The tannery produced high-quality leather for export.
A2 noun /ˈeɪn.dʒəl/

Angel

Meaning
a spiritual being believed to act as an attendant, agent, or messenger of God
Example
She looked like an angel in her white dress.
B2 verb /ˈverɪfaɪ/

verify

Meaning
to check if something is true or correct; to confirm
Example
Please verify your email address before proceeding.
C2 noun /ˌhaɪdrəˈstætɪks/

hydrostatics

Meaning
The branch of science concerned with the mechanical properties of fluids at rest.
Example
Hydrostatics is essential in understanding how dams and reservoirs function.
C1 adjective /pɒˈstɪəriər/

posterior

Meaning
Situated at or toward the back; later in time.
Example
The posterior part of the brain controls vision.
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 noun /ˈɔːrzmən/

Oarsman

Meaning
a person who rows a boat, especially as a member of a racing crew
Example
The experienced oarsman rowed the boat across the river.
B2 adjective /ɪkˈskluːsɪv/

exclusive

Meaning
restricted to a particular person, group, or area; not shared with others
Example
The hotel offers exclusive access to a private beach.
C1 noun /ˈlæd.i/

laddie

Meaning
A young boy or lad.
Example
The old man gave the young laddie a kind smile.
C2 adjective /sɪˈnɜːrdʒɪk/

synergic

Meaning
Working together in a cooperative and effective manner.
Example
The two departments have a synergic relationship that boosts productivity.
B2 noun /ˈraɪdər/

rider

Meaning
A person who rides a horse, bicycle, motorcycle, or other vehicle.
Example
The rider fell off the horse.
B1 adjective /ˈkæʒ.u.əl/

Casual

Meaning
relaxed and unconcerned; happening by chance; informal
Example
He wore casual clothes to the party.
B2 noun /ˈmɪks.tʃər/

Mixture

Meaning
a combination of different substances or elements
Example
The cake batter is a mixture of flour, eggs, and milk.
B2 noun /doʊs/

dose

Meaning
a measured amount of a medicine or drug taken at one time
Example
The doctor prescribed one dose of the medicine every six hours.
C1 noun /ˈiːɡətɪst/

egotist

Meaning
A person who is excessively self-centered or talks too much about themselves.
Example
The egotist dominated the conversation by talking only about his own achievements.
C1 noun /ˈɪtʃ.i.nəs/

itchiness

Meaning
The quality or condition of feeling an irritating sensation on the skin that causes a desire to scratch.
Example
Eye itchiness often leads to rubbing.
B2 adjective əˈstaʊn.dɪŋ

astounding

Meaning
Surprisingly impressive or notable; causing shock or surprise.
Example
The magician's astounding tricks left the audience speechless.
B2 noun /ˌpʌɪ.əˈnɪr/

Pioneer

Meaning
a person who is among the first to explore or settle a new area; someone who develops new ideas or methods
Example
She was a pioneer in the field of computer science.
C1 adjective /pəˈnʌltɪmət/

penultimate

Meaning
second to the last in a sequence or series
Example
She finished the penultimate chapter before going to sleep.
B2 adjective /ˈdevəsteɪtɪŋ/

devastating

Meaning
causing severe shock, distress, or destruction; extremely damaging or upsetting
Example
The earthquake had a devastating effect on the city.
B1 noun /ˈɡædʒ.ɪt/

gadget

Meaning
A small mechanical or electronic device with a particular function, often novel or useful.
Example
He loves buying the latest kitchen gadgets.
B2 noun/verb /eɪp/

ape

Meaning
a large primate similar to a monkey but without a tail; as a verb, to imitate or mimic
Example
Children often ape the behavior of adults.
C2 adjective /ˌoʊpəˈlɛsənt/

opalescent

Meaning
showing or reflecting a milky, iridescent light like an opal
Example
The opalescent sky glowed with shades of pink and blue.
C1 noun /ˈrep.lɪ.kə/

Replica

Meaning
an exact copy or model of something, especially one on a smaller scale
Example
The museum displayed a perfect replica of the ancient statue.
C2 adjective /ˌɔːfˈkiː/

off-key

Meaning
out of tune; not in accordance with expected standards
Example
The singer was slightly off-key during the performance.
C1 adjective /ˈpærəmaʊnt/

paramount

Meaning
more important than anything else; supreme
Example
Safety is of paramount importance in this factory.
C1 verb ˈplʌmɪtɪŋ

plummeting

Meaning
Falling or dropping suddenly and steeply; decreasing rapidly
Example
The fertility rate in Bangladesh is plummeting.
B2 noun /diːp ˈkʌlər/

Deep colour

Meaning
a rich, intense, or dark shade of any color
Example
The artist used deep colours to create a dramatic effect.