adulterate
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C2 verb /əˈdʌltəreɪt/

adulterate

Meaning
to make something poorer in quality by adding another substance, usually of lower quality
Example
The company was fined for adulterating its products with cheap chemicals.
C2 adjective /ˈlɪsɪt/

licit

Meaning
Permitted by law or by rules; legal.
Example
The trade of certain goods is licit under international law.
C2 verb /ˌkɒntrəˈvɜːrt/

controvert

Meaning
to dispute or argue against; to contradict
Example
The scientist controversed the previous research findings.
C2 adjective /ˈɪrˌsplɪtɪŋ/

earsplitting

Meaning
extremely loud or piercing sound
Example
The earsplitting noise of the fire alarm startled everyone.
C2 verb /ˈhɑːrpɪŋ/

harping

Meaning
continuously talking or complaining about something in a tiresome way
Example
She kept harping on about the mistakes I made.
C2 noun /prəˈpɪŋkwɪti/

propinquity

Meaning
the state of being close to someone or something; proximity
Example
The propinquity of their houses made them close friends.
C2 noun /ˈpætwɑː/

patois

Meaning
a regional or social dialect, especially one considered nonstandard or informal
Example
The guide slipped into local patois when chatting with the fishermen.
C2 noun /ˈmɛtrəˌnoʊm/

metronome

Meaning
A device that produces regular ticks or beats to help musicians maintain tempo.
Example
She practiced the piano with a metronome to keep steady timing.
C2 noun /ˌæprəˈbeɪʃən/

approbation

Meaning
approval or praise
Example
The plan won the approbation of the board members.
C2 noun brəˈvɑː.dəʊ

bravado

Meaning
Show of courage or confidence that is not real.
Example
His bravado masked his nervousness before the performance.
C2 verb /diːˈmoʊbəlaɪz/

demobilize

Meaning
To release from military service or to disband troops.
Example
The government decided to demobilize the army after the war.
C2 noun əˈkjuː.ə.ti

acuity

Meaning
Sharpness or keenness of thought, vision, or hearing.
Example
His intellectual acuity made him a brilliant scientist.
C2 adjective /ˈlɪəri/

leery

Meaning
Cautious or wary due to suspicion or distrust.
Example
She was leery of investing in the new business.
C2 adjective /ˈkɒr.ə.ɡeɪ.tɪd/

corrugated

Meaning
shaped into ridges and grooves; wrinkled or folded
Example
The roof was made of corrugated metal sheets.
C2 noun /ˈflætʃələns/

flatulence

Meaning
the accumulation of gas in the digestive system; excessive gas in the stomach or intestines
Example
Eating beans can sometimes cause flatulence.
C2 noun /ˌɪnkænˈdɛsəns/

incandescence

Meaning
the emission of light from a hot object; brilliance
Example
The incandescence of the candle filled the dark room.
C2 noun /nɑːrˈsɪsəs/

narcissus

Meaning
A type of flowering plant with yellow or white blooms, often associated with self-love from Greek mythology.
Example
A narcissus bloomed in the garden during spring.
C2 adjective /ˈkɒŋɡruənt/

congruent

Meaning
in agreement or harmony; having the same shape and size in geometry
Example
Their values are congruent with the goals of the organization.
C2 adjective /ˌæf.əˈrɪs.tɪk/

aphoristic

Meaning
expressed in the style of a short, witty saying
Example
Her writing style is concise and aphoristic.
C2 noun /paɪər/

pyre

Meaning
A heap of combustible material, especially one used for burning a corpse as part of a funeral ceremony.
Example
The villagers built a pyre to honor the deceased.
C2 noun /ˌmænjəˈmɪʃən/

manumission

Meaning
The act of a slave owner freeing their slaves.
Example
The manumission of the slaves marked a turning point in history.
C2 adjective /ˈhʌmdrʌm/

humdrum

Meaning
Lacking excitement or variety; dull and monotonous.
Example
She grew tired of the humdrum routine of office life.
C2 adjective /mɛnˈdeɪʃəs/

mendacious

Meaning
not telling the truth; lying
Example
The politician was known for his mendacious statements.
C2 noun /ˈriːdʒənt/

regent

Meaning
a person who rules in place of a monarch when the monarch is absent or too young
Example
The prince acted as regent until the king came of age.
C2 adjective /ˌluː.mɪˈnɛs.ənt/

luminescent

Meaning
Emitting light without heat, glowing softly.
Example
The luminescent watch dial was visible in the dark.
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.
C2 adjective /ˈslæp.dæʃ/

slapdash

Meaning
done too quickly and carelessly; hasty and careless
Example
The report was written in a slapdash manner, full of errors.
C2 adjective /ˈæfərənt/

afferent

Meaning
carrying impulses toward a central organ or part, especially toward the brain or spinal cord
Example
Afferent nerves carry signals from the body to the brain.
C2 adjective /ɛɡˈzɪɡjuəs/

exiguous

Meaning
small in amount; scanty or inadequate
Example
They survived on exiguous rations during the journey.
C2 verb /kənˈvɑːlv/

convolve

Meaning
to roll or twist together; to coil or entwine
Example
The vines convolve around the tree trunk.
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.
C2 noun /ˈdɛkəˌɡræm/

decagram

Meaning
A metric unit of mass equal to ten grams.
Example
The package weighed exactly one decagram.
C2 noun /ˈɛpɪtɑːf/

epitaph

Meaning
A short text written on a tombstone in memory of the deceased.
Example
The gravestone bore an epitaph honoring the soldier’s bravery.
C2 adjective /ˈmiː.di.eɪ.tɪv/

mediative

Meaning
Related to mediation, helping to resolve conflicts through diplomatic means.
Example
His mediative skills helped resolve the conflict.
C2 adjective /ˈmɜːrkəntaɪl/

mercantile

Meaning
related to trade or commerce
Example
The city grew rapidly due to its mercantile activities.
C2 adjective /ˈfɛtɪd/

fetid

Meaning
having a strong, unpleasant smell
Example
The fetid smell from the garbage was unbearable.
C2 verb /sɛkˈstuːpəl/

sextuple

Meaning
to make or become six times as great or as many
Example
Within two quarters, the campaign sextupled their daily sign-ups.
C2 verb /ˈfʌdəl/

fuddle

Meaning
To confuse or stupefy, especially with alcohol or overwhelming information.
Example
The complicated instructions fuddled the new employees.
C2 noun /ˌniːoʊˈdɑːrwɪnɪzəm/

neo-darwinism

Meaning
A modern interpretation of Darwin's theory of evolution, integrating genetics and natural selection.
Example
Neo-Darwinism combines Darwin’s theory of natural selection with modern genetics.
C2 noun /ˈænɪməlˌkjuːl/

animalcule

Meaning
A microscopic animal, especially a protozoan or other minute organism.
Example
The scientist observed an animalcule moving under the microscope.
C2 noun /proʊˈbɑːsɪs/

proboscis

Meaning
The long, flexible nose of some animals, especially an elephant, or a tubular feeding and sucking organ in insects.
Example
The elephant used its proboscis to grab food.
C2 noun /praɪˈveɪʃən/

privation

Meaning
A state in which things essential for human well-being such as food and warmth are lacking.
Example
The refugees suffered great privation during the harsh winter.
C2 noun /ˈhɔɪdən/

hoyden

Meaning
a boisterous or tomboyish girl
Example
The hoyden preferred climbing trees to playing with dolls.
C2 noun /ˈʃʊərəti/

surety

Meaning
a person who takes responsibility for another's performance of an undertaking, such as appearing in court or paying a debt
Example
The landlord required a surety before renting the apartment.
C2 verb /ˈmɔːrtɪfaɪ/

mortify

Meaning
to cause someone to feel great embarrassment or shame
Example
She was mortified when she tripped on stage.
C2 noun /baɪt/

bight

Meaning
A bend or curve in a geographical feature, especially a coastline, or a loop in a rope.
Example
The sailors anchored in the calm waters of the bight.
C2 noun /ˌbaɪ.oʊ.rɪˌmiː.diˈeɪ.ʃən/

bioremediation

Meaning
The use of living organisms to neutralize or remove environmental contaminants.
Example
Bioremediation helps remove toxins from polluted soil.
C2 adjective /ˌæp.rɪˈhen.sə.bəl/

Apprehensible

Meaning
able to be understood or grasped; comprehensible
Example
The complex theory became apprehensible after the professor's explanation.
C2 adjective /ˌpɛnɪˈtɛnʃəl/

penitential

Meaning
Relating to or expressing penitence or penance.
Example
The priest delivered a penitential sermon on forgiveness.
C2 noun /ˈkrɪsəndəm/

christendom

Meaning
the worldwide body or community of Christians
Example
The news spread quickly across Christendom.
C2 noun /ˌmɛtəˈfɪzɪks/

metaphysics

Meaning
The branch of philosophy that deals with the fundamental nature of reality, existence, and the relationship between mind and matter.
Example
She studied metaphysics to understand the principles of existence beyond physical science.
C2 noun /hɜːrs/

Hearse

Meaning
a vehicle for conveying the coffin at a funeral; a funeral car
Example
The black hearse slowly made its way to the cemetery, followed by a procession of mourners.
C2 verb /əˈɡriːv/

aggrieve

Meaning
to cause distress or make someone feel resentful
Example
She felt aggrieved by the unfair decision.
C2 noun /ˌɛərəˈstætɪks/

aerostatics

Meaning
The branch of physics that deals with the equilibrium of air and gases and the forces acting on bodies in them.
Example
Aerostatics is essential for understanding how balloons float.
C2 noun /flɔːˈrɛsəns/

florescence

Meaning
The process, state, or period of flowering.
Example
The garden reached its peak florescence in spring.
C2 adjective /ˈmjuːlɪʃ/

mulish

Meaning
extremely stubborn or unwilling to change
Example
She remained mulish despite all the convincing arguments.
C2 adjective /ˌɪrɪˈprəʊtʃəbl̩/

irreproachable

Meaning
Beyond criticism; faultless.
Example
The judge was known for his irreproachable integrity.
C2 adjective /dɪˈmjʊər/

demure

Meaning
reserved, modest, and shy
Example
She gave him a demure smile.
C2 verb /ɛnˈdʒɔɪn/

enjoin

Meaning
to instruct or urge someone to do something; to prohibit legally
Example
The judge enjoined the company from continuing its activities.
C2 adjective, adverb /ˈsaɪdlɔːŋ/

sidelong

Meaning
Directed to the side; indirect, furtive, or not straightforward.
Example
She gave him a sidelong glance across the room.
C2 adjective /ɑːrˈθʊr.i.ən/

arthurian

Meaning
Relating to the legendary King Arthur and the stories surrounding him.
Example
The novel is set in an Arthurian world of knights and castles.
C2 noun /ˌdɛrɪˈlɪkʃən/

dereliction

Meaning
the state of being abandoned; neglect of duty
Example
The officer was charged with dereliction of duty.
C2 noun/adjective /ˈæl.əˌbæs.tər/

alabaster

Meaning
A fine-grained, usually white variety of gypsum, often used for carving; also describes something smooth and pale like alabaster.
Example
The statue was carved from pure alabaster.
C2 noun /məˈlɪŋɡərər/

malingerer

Meaning
a person who pretends to be sick to avoid duty or work
Example
The manager suspected that John was a malingerer.
C2 verb /ˈɛkspieɪt/

expiate

Meaning
to make amends for guilt or wrongdoing
Example
He tried to expiate his crime by helping the poor.
C2 noun /weɪf/

Waif

Meaning
a homeless or abandoned child; a stray person or animal
Example
The charity helps waifs and strays find homes and families.
C2 noun /meɪˈlɑːnʒ/

melange

Meaning
A mixture of different things or styles.
Example
The festival offered a melange of music, food, and art.
C2 noun /proʊˈsiː.ni.əm/

proscenium

Meaning
the part of a theater stage in front of the curtain; the arch framing the stage
Example
The actors bowed at the proscenium before leaving the stage.
C2 verb /ˈɪntərˌdɪkt/

interdict

Meaning
to prohibit or forbid something by authoritative order, often by law or decree
Example
The court moved to interdict the sale of the illegal goods.
C2 verb /ˈæd.ʌm.breɪt/

adumbrate

Meaning
to foreshadow or suggest something in an unclear or indirect way
Example
The report adumbrates future economic challenges.
C2 noun /ˈstrɪndʒənsi/

stringency

Meaning
the quality of being strict, precise, or severe
Example
The stringency of the new rules surprised everyone.
C2 verb /ˌkaʊntərˈmænd/

countermand

Meaning
to revoke or cancel an order or command
Example
The general countermanded the previous orders immediately.
C2 noun /ˈɡoʊld.moʊ.hɜːr/

Goldmohur

Meaning
A tropical tree with bright orange-red flowers, also known as flame tree or royal poinciana
Example
The goldmohur tree bloomed beautifully in the summer heat.
C2 adjective /ˈnɒmɪk/

nomic

Meaning
Relating to laws, rules, or systems.
Example
The philosopher discussed the nomic necessity of natural laws.
C2 adjective /ˌɪnkɔːrˈpɔːriəl/

incorporeal

Meaning
lacking a physical body; not composed of matter; intangible
Example
Ghosts are often described as incorporeal beings.
C2 adjective /ˌdɒktrɪˈnɛər/

doctrinaire

Meaning
stubbornly devoted to a theory or doctrine without regard to practical considerations
Example
His doctrinaire approach to politics alienated many supporters.
C2 noun /ˌrɛv.əˈkeɪ.ʃən/

revocation

Meaning
The act of officially canceling or withdrawing something.
Example
The court ordered the revocation of his license.
C2 noun /ˈæpəˌsteɪt/

apostate

Meaning
A person who renounces a religious or political belief or principle.
Example
He was labeled an apostate after abandoning the faith of his community.
C2 noun /ˌrɛtəˈrɪʃən/

rhetorician

Meaning
A person who is skilled in the art of rhetoric or persuasive speaking/writing.
Example
The rhetorician captivated the audience with his eloquence.
C2 noun /ˈæp.ɪˌkʌl.tʃər/

apiculture

Meaning
The practice of keeping and raising bees for honey and other products.
Example
Apiculture plays a vital role in agriculture by supporting pollination.
C2 noun /ˌvɛəriəˈɡeɪʃən/

variegation

Meaning
The appearance of differently colored zones in the leaves, flowers, or stems of plants.
Example
Variegation makes the foliage look more attractive.
C2 noun /niːˈɒlədʒɪzəm/

neologism

Meaning
A newly coined word or expression.
Example
The internet has given rise to many neologisms like 'selfie' and 'hashtag'.
C2 verb /slʌf/ or /sluː/

slough

Meaning
To shed or cast off (like dead skin); also a swampy or muddy area.
Example
The snake sloughed off its old skin.
C2 noun /kəˈdævər/

cadaver

Meaning
A dead human body, especially one used for medical study.
Example
Medical students dissected the cadaver to learn about human anatomy.
C2 adjective /ɡɑːrˈɡæntʃuən/

gargantuan

Meaning
Extremely large; enormous.
Example
They served a gargantuan meal at the feast.
C2 adjective /ˌænθrəpəˈmɔːrfəs/

anthropomorphous

Meaning
having the form or attributes of a human
Example
The statue had an anthropomorphous shape resembling a human.
C2 noun /pəˈlæv.ər/

palaver

Meaning
prolonged and idle discussion; fuss or unnecessary talk
Example
After much palaver, they finally agreed on the plan.
C2 noun /ˌdaɪ.jʊˈret.ɪk/

diuretic

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

lackey

Meaning
a person who is overly willing to serve or obey someone else
Example
He treated his assistant like a mere lackey.
C2 noun /ˌkæl.sɪ.fɪˈkeɪ.ʃən/

calcification

Meaning
The process of calcium accumulation in soil, making it hard.
Example
Calcification reduces soil permeability and affects crop growth.
C2 noun /ˈsætræp/

satrap

Meaning
a governor of a province in ancient Persia; also used figuratively for a subordinate ruler
Example
The king appointed a satrap to oversee the distant province.
C2 noun /məˈrɔː.dər/

marauder

Meaning
a person who roams around in search of things to steal or people to attack
Example
Villagers feared the marauders who raided their homes.
C2 verb, noun /ˈɡoʊld.brɪk/

goldbrick

Meaning
to avoid work or duty; a person who shirks responsibility
Example
He was accused of goldbricking while the rest of the team worked hard.
C2 noun /juːˈdʒen.ɪks/

eugenics

Meaning
the study or practice of improving the genetic quality of the human population
Example
Eugenics has been criticized for its unethical applications in history.
C2 noun /ˈluːkər/

lucre

Meaning
money, especially when regarded as sordid or gained dishonorably
Example
He was motivated more by lucre than by duty.
C2 noun /ˈbʊlwərk/

bulwark

Meaning
A strong wall or defensive structure; something that provides protection or support.
Example
The fortress walls served as a bulwark against enemy attacks.
C2 noun /drɒs/

dross

Meaning
worthless or unwanted material; rubbish or impurities
Example
Most of his early writings were considered dross.
C2 noun /ˌɛfəˈvɛsəns/

effervescence

Meaning
The release of gas bubbles; vivacity or high-spiritedness.
Example
Her effervescence made her the life of the party.
C2 noun /ˈsætər/

satyr

Meaning
a creature from Greek mythology depicted as a lustful being, often half-man and half-goat; by extension, a lecherous man
Example
In the museum mural, a satyr plays the panpipes while dancing in the woods.
C2 adjective /pərˈsuːənt/

pursuant

Meaning
in accordance with or following something, especially a law or rule
Example
The decision was made pursuant to the regulations.
C2 noun /ˈkʌlvərt/

culvert

Meaning
a tunnel or drain that carries water under a road or railway
Example
The heavy rainwater flowed through the culvert under the bridge.
C2 noun /ˌhaɪdroʊməˈkænɪks/

hydromechanics

Meaning
The study of the mechanical properties and behavior of fluids in motion and at rest.
Example
Hydromechanics provides the foundation for naval architecture.
C2 noun /ˈbɔːl.səm ˈæp.əl/

Balsam apple

Meaning
a bitter gourd vegetable with a bumpy green skin, also known as bitter melon
Example
Balsam apple is cooked with spices to reduce its bitter taste.
C2 noun /ˈlev.ɪ.ti/

Levity

Meaning
humor or frivolity, especially the treatment of a serious matter with humor or in a manner lacking due respect
Example
The levity in the courtroom was inappropriate.
C2 noun /ˈɑːrbərɪˌkʌltʃər/

arboriculture

Meaning
the cultivation and management of trees and shrubs
Example
He studied arboriculture to improve urban green spaces.
C2 noun /draɪ ɡuːs ˈbɛri/

Dry goose berry

Meaning
dehydrated amla fruit, rich in vitamin C and used for medicinal and culinary purposes
Example
Dry goose berry powder is excellent for hair growth.
C2 noun /ˈspæŋɡəl/

spangle

Meaning
A small shiny piece of metal or plastic used for decoration on clothes.
Example
Her dress was covered with silver spangles that glittered in the light.
C2 adjective /dɪsˈkɜrsɪv/

discursive

Meaning
Tending to digress or move from topic to topic; lengthy and rambling.
Example
His discursive style made the lecture hard to follow.
C2 noun /ˈstriːmlɪt/

streamlet

Meaning
a small stream; a tiny brook or rivulet
Example
A streamlet flowed through the meadow.
C2 noun /hɪˈdʒɛməni/ or /ˈhɛdʒəmoʊni/

hegemony

Meaning
leadership or dominance, especially by one state or group over others
Example
The empire maintained its hegemony over neighboring states.
C2 noun prəˈklɪv.ə.ti

proclivity

Meaning
A tendency to choose or do something regularly; an inclination or predisposition toward a particular thing.
Example
She has a proclivity for learning new languages.
C2 noun /əˈnɔɪnt.mənt/

anointment

Meaning
The act of anointing, usually with oil, as part of a ritual or ceremony.
Example
The anointment of the new leader was a sacred ritual.
C2 noun /ˈbriːtʃɪz/

Breeckes

Meaning
knee-length trousers; short pants
Example
He wore riding breeches for the equestrian event.
C2 adjective /ɪnˈkɑːdʒɪtənt/

incogitant

Meaning
Lacking thought; inconsiderate or thoughtless.
Example
It was incogitant of him to make such a rude comment.
C2 adjective /ɔːrˈθɑːɡənl/

orthogonal

Meaning
at right angles; independent or unrelated
Example
In mathematics, two vectors are orthogonal if their dot product is zero.
C2 noun /voʊˈsɪfərəns/

vociferance

Meaning
the act of shouting or making a loud outcry
Example
The vociferance of the protesters filled the streets.
C2 noun /ˈkjʊriˌoʊ/

curio

Meaning
a small unusual or interesting object, often collected for its rarity
Example
She bought a curio from the antique shop.
C2 noun /bɪˈnɪɡnɪti/

Benignity

Meaning
kindness; gentleness; the quality of being benign or gracious
Example
Her benignity towards all people made her beloved by everyone.
C2 noun /ˈpaʊ.waʊ/

powwow

Meaning
an informal meeting or conference to discuss something
Example
The team held a quick powwow before the presentation.
C2 noun /ˈɡævəl/

gavel

Meaning
A small ceremonial mallet used by a judge or an auctioneer to signal attention or mark a decision.
Example
The judge struck the gavel to call the court to order.
C2 noun /ˌɒpəˈrɛtə/

operetta

Meaning
a short opera with light and humorous themes
Example
The theater staged a famous operetta by Gilbert and Sullivan.