retrogression
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C2 noun /ˌrɛtroʊˈɡrɛʃən/

retrogression

Meaning
a return to a worse or less developed state
Example
The country experienced economic retrogression after the crisis.
C2 noun /ɪˈnɪkwɪti/

iniquity

Meaning
Immoral or grossly unfair behavior.
Example
The dictator's regime was marked by corruption and iniquity.
C2 noun /ˈruː.mɪ.nənt/

ruminant

Meaning
a cud-chewing mammal, such as a cow or sheep
Example
Cows are ruminants that chew cud.
C2 noun ˈɒpjʊləns

opulence

Meaning
Great wealth or luxuriousness.
Example
The opulence of the mansion was evident in its ornate furnishings.
C2 adjective /ɪmˌpɜːrˈsweɪdəbl/

impersuadable

Meaning
not able to be convinced or persuaded
Example
She remained impersuadable despite all our arguments.
C2 noun /ɪnˈvaɪtər/

invitor

Meaning
a person who invites someone to an event, meeting, or place
Example
The invitor greeted all the guests warmly at the entrance.
C2 noun /kaɪˈmɪərə/

chimera

Meaning
A mythical creature with parts from different animals; also used to mean a fanciful illusion or unattainable dream.
Example
The idea of a perfect society is often a chimera.
C2 noun /biˈætɪtjuːd/

beatitude

Meaning
supreme blessedness or happiness, often used in reference to the sayings of Jesus in the Sermon on the Mount
Example
She felt a state of beatitude after receiving the good news.
C2 adjective /ɪˈnɪkwɪtəs/

iniquitous

Meaning
grossly unfair and morally wrong
Example
Slavery was one of the most iniquitous practices in history.
C2 noun /kiˌɑːrəˈskjʊəroʊ/

chiaroscuro

Meaning
The use of strong contrasts between light and dark in art or literature to create a dramatic effect.
Example
The artist's painting used chiaroscuro to highlight the figure's face.
C2 adjective /ɑːlˈfæktəri/

olfactory

Meaning
Relating to the sense of smell.
Example
The perfume activated her olfactory nerves immediately.
C2 noun /ˈsɪŋ.krə.ni/

synchrony

Meaning
Coordination in time, harmony in action or movement.
Example
Their dance performance showed perfect synchrony.
C2 verb /ˌriː.kəˈpɪtʃ.ə.leɪt/

recapitulate

Meaning
To summarize and state again the main points of something.
Example
The teacher asked the student to recapitulate the lesson.
C2 verb əˈtɛn.ju.eɪt

attenuate

Meaning
To reduce the force, effect, or value of something; to make weak or thin.
Example
The medicine helps attenuate the pain.
C2 noun /ˌdɪsrɪˈpjuːt/

disrepute

Meaning
the state of being held in low esteem or having a bad reputation
Example
The scandal brought the politician into disrepute.
C2 verb /əbˈhɔːr/

abhor

Meaning
to regard with disgust and hatred
Example
She abhors cruelty to animals.
C2 noun /kəˈdɛnzə/

cadenza

Meaning
An elaborate solo passage in a piece of music, usually near the end.
Example
The pianist performed a brilliant cadenza before the final movement.
C2 verb /ˌmɪskənˈstruː/

misconstrue

Meaning
To interpret something wrongly or misunderstand the meaning.
Example
She misconstrued his silence as anger.
C2 adjective /æbˈhɔːr.ənt/

Abhorrent

Meaning
extremely unpleasant and causing disgust; detestable
Example
The idea of animal cruelty is abhorrent to most people.
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 noun /ɛˌspriː də ˈkɔːr/

esprit de corps

Meaning
A feeling of pride, fellowship, and loyalty shared by members of a group.
Example
The team's esprit de corps was evident in their cooperative effort.
C2 adjective /ˈɪm.pi.əs/

Impious

Meaning
irreligious; lacking reverence for religion; blasphemous
Example
The impious act shocked the religious community.
C2 verb, noun /ɡaʊdʒ/

gouge

Meaning
To cut or scoop out a deep hole or groove; to overcharge unfairly.
Example
He accidentally gouged a hole in the wooden table.
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 noun /leɪð/

lathe

Meaning
A machine for shaping wood, metal, or other material by rotating it against a cutting tool.
Example
The carpenter used a lathe to shape the wooden bowl.
C2 noun /ˈɔːldərmən/

alderman

Meaning
An elected member of a municipal council in certain cities and towns.
Example
The alderman proposed a new plan for community parks.
C2 adjective /ɪnˈɛk.wɪ.tə.bəl/

inequitable

Meaning
Not fair or just; lacking in fairness or equality.
Example
The distribution of resources was inequitable among the workers.
C2 verb /ʌnˈɑːrm/

unarm

Meaning
to remove weapons from someone or to deprive of means of attack or defense
Example
The soldiers were ordered to unarm the prisoners.
C2 adjective /ˈflæb.i/

Flabby

Meaning
soft and loose; lacking firmness or muscle tone; weak
Example
His flabby arms showed he needed to exercise more.
C2 adjective /ˌdɛfəˈrɛnʃəl/

deferential

Meaning
Showing or expressing respect and high regard.
Example
He was always deferential toward his teachers.
C2 adjective /ˈɡlʌt.ən.əs/

gluttonous

Meaning
Excessively greedy in eating or consuming.
Example
His gluttonous appetite shocked everyone at the dinner table.
C2 noun /ˈlɑːrsəni/

larceny

Meaning
The unlawful taking of personal property with intent to deprive the rightful owner of it.
Example
He was arrested for committing larceny at the store.
C2 noun /ˈseɪnjər/

seignior

Meaning
A feudal lord; a man of authority in medieval Europe.
Example
The seignior demanded taxes from the peasants.
C2 noun /ˈhækəlz/

hackles

Meaning
the hairs on the back of an animal’s neck that rise when it is angry or alarmed; figuratively, feelings of anger or resentment
Example
His rude comment raised my hackles.
C2 noun /ˌhɛtərəʤəˈniːɪti/

heterogeneity

Meaning
the quality or state of being diverse in character or content
Example
The cultural heterogeneity of the city makes it vibrant and unique.
C2 adjective /sɛnˈtrɪpɪtəl/

centripetal

Meaning
Moving or directed toward a center.
Example
Centripetal force keeps the planets in orbit around the sun.
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 /dɪˈsɛnʃənt/

dissentient

Meaning
Expressing or holding opinions that are opposed to the majority or official view.
Example
Only a few dissentient voices were heard during the debate.
C2 noun /ˈkɔːrsər/

courser

Meaning
a swift horse or a hunting horse
Example
The knight rode a fast courser into battle.
C2 adjective /ˈnɛðər/

nether

Meaning
situated down or below; lower
Example
They explored the nether regions of the cave.
C2 noun ˌbaɪ.oʊ.əˈveɪ.lə.bɪl.ə.ti

bioavailability

Meaning
The degree to which a substance can be absorbed and used by the body.
Example
Turmeric's bioavailability increases when consumed with black pepper.
C2 noun /əˈdɛpt.nəs/

adeptness

Meaning
Skill and dexterity in a task.
Example
His adeptness in negotiations helped close the deal successfully.
C2 adjective /ˌdaɪəˈkrɪtɪkəl/

diacritical

Meaning
Relating to a mark added to a letter to indicate a different pronunciation or stress.
Example
The word résumé has diacritical marks that change its meaning from resume.
C2 adjective /ɪnˈtɛsteɪt/

intestate

Meaning
Having died without leaving a valid will.
Example
She died intestate, so her assets were distributed by law.
C2 adjective /ˈdɛdˌpæn/

deadpan

Meaning
Deliberately impassive or expressionless in manner.
Example
She delivered the joke in a completely deadpan voice.
C2 verb /ˌdɛlɪˈkwɛs/

deliquesce

Meaning
to become liquid by absorbing moisture from the air
Example
The salt began to deliquesce after being left in the humid room.
C2 noun /ˈtʃaɪ.nə roʊz/

China-rose

Meaning
a tropical flowering plant with large, showy flowers in various colors
Example
The bright red China-rose flowers decorated the entrance of the house.
C2 noun /ˈstrɪk.tʃər/

stricture

Meaning
a restriction or limitation; a critical remark
Example
The new law placed a severe stricture on free speech.
C2 noun /ˈɒfərtɔːri/

offertory

Meaning
The part of a religious service when offerings are collected; the offering itself.
Example
The offertory was taken during the Sunday service.
C2 adjective /pɪˈskætɔːrɪəl/

piscatorial

Meaning
relating to fishing or fishermen
Example
He has a deep knowledge of piscatorial techniques and fish species.
C2 adjective /ˈbɪz.ən.taɪn/ or /ˈbaɪ.zənˌtiːn/

byzantine

Meaning
Extremely complicated and detailed; relating to the Byzantine Empire or its style.
Example
The new tax regulations are so byzantine that few understand them.
C2 verb /juˈzɜrp/

usurp

Meaning
to take someone's position of power illegally or by force
Example
The general tried to usurp the king's throne.
C2 noun /læŋ'ɡʊər/

Langoor

Meaning
a long-tailed monkey found in Asia, especially India and Southeast Asia
Example
The langoor was sitting on the tree branch eating fruits.
C2 noun /vərˈmɪl.jən/

Vermillion

Meaning
a bright red-orange color; a pigment of this color
Example
The artist used vermillion paint for the sunset.
C2 noun /ˌfoʊ.mənˈteɪ.ʃən/

fomentation

Meaning
The action of instigating or stirring up; also the application of warm substances to the body to ease pain.
Example
His speech led to the fomentation of violence in the region.
C2 verb /ˈɑːblɪˌɡeɪt/

obligate

Meaning
to bind legally or morally; to compel someone to do something
Example
The contract obligates the company to provide timely service.
C2 noun /ˈbɜːrɡər/

burgher

Meaning
A citizen of a town, typically a member of the wealthy middle class.
Example
The burgher was respected as a prosperous merchant in the city.
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.
C2 adjective /ˌʌn.rɪˈdʒɛn.ər.ət/

unregenerate

Meaning
Not reformed or showing no signs of change; stubbornly refusing to reform or repent.
Example
He remained an unregenerate opponent of progress.
C2 noun /ˌhoʊ.mi.oʊˈsteɪ.sɪs/

homeostasis

Meaning
The tendency toward a relatively stable equilibrium between interdependent elements, especially as maintained by physiological processes.
Example
The human body maintains homeostasis through temperature regulation.
C2 adjective /ˈskʌr.ɪ.ləs/

scurrilous

Meaning
Using or expressed in coarse, abusive, or slanderous language.
Example
The politician faced criticism for his scurrilous remarks about his opponent.
C2 noun /ˌdiːnəʊˈteɪʃən/

denotation

Meaning
The literal or primary meaning of a word, in contrast to the feelings or ideas that the word suggests.
Example
The denotation of the word 'rose' is a type of flower.
C2 noun /ˈbed.ləm/

Bedlam

Meaning
a scene of noisy confusion; chaos and disorder
Example
The classroom was complete bedlam after the fire alarm.
C2 noun /bɒmˈbeɪ dʌk/

Bombay duck

Meaning
a type of lizardfish found in coastal waters, commonly eaten dried and salted in South Asia
Example
Bombay duck is a popular delicacy when dried and fried.
C2 adjective /tʃəˈruːbɪk/

cherubic

Meaning
Innocent, sweet, and angelic, like a cherub.
Example
The baby had a cherubic smile that melted everyone’s heart.
C2 noun /kənˈfɛsər/

confessor

Meaning
A person who confesses sins or secrets, especially to a priest.
Example
The confessor listened patiently to the troubled man.
C2 noun /əbˈstɛtrɪks/

obstetrics

Meaning
The branch of medicine dealing with childbirth and care of women giving birth.
Example
She is studying obstetrics to become a specialist in childbirth.
C2 noun /ˈhɑːr.bɪn.dʒər/

Harbinger

Meaning
a person or thing that announces or signals the approach of another; a forerunner of something
Example
The first robin of spring is often considered a harbinger of warmer weather to come.
C2 verb /ɪnˈfætʃueɪt/

infatuate

Meaning
to inspire with an intense but short-lived passion or admiration
Example
He was infatuated with her beauty.
C2 adjective /ˈdaʊ.di/

dowdy

Meaning
unfashionable, dull, or shabby in appearance
Example
She wore a dowdy dress to the party.
C2 adjective /ˈkʌsɪd/

cussed

Meaning
Annoyingly stubborn or difficult.
Example
He was too cussed to admit his mistake.
C2 adjective /ˌmɛrəˈtrɪʃəs/

meretricious

Meaning
apparently attractive but having no real value or integrity.
Example
The design was flashy but meretricious.
C2 noun /ˈnʌnəri/

nunnery

Meaning
A convent or building where nuns live and work.
Example
She decided to join the nunnery to devote her life to spiritual practice.
C2 noun /ˈɡælvəˌnɪzəm/

galvanism

Meaning
Electricity produced by chemical action, especially in a battery; the therapeutic use of electricity in medicine.
Example
Galvanism played a key role in early experiments with electricity.
C2 noun /ˌɔːrnɪˈθɑːlədʒi/

ornithology

Meaning
the scientific study of birds
Example
She pursued ornithology to understand the migration patterns of birds.
C2 adjective /bəˈnɛfɪsənt/

beneficent

Meaning
generous or doing good
Example
The beneficent leader donated funds to build a hospital.
C2 noun /ˈvaɪənd/

viand

Meaning
an item of food, especially a delicacy
Example
The banquet was filled with rich viands and wines.
C2 noun /ˌsɪnjuˈɒsɪti/

sinuosity

Meaning
The quality or state of being winding, curving, or having many turns.
Example
The sinuosity of the river made navigation challenging.
C2 noun /ˌmjuːtəˈbɪləti/

mutablility

Meaning
A misspelled form of 'mutability', meaning the quality of being changeable.
Example
The document contained the misspelled word 'mutablility' instead of 'mutability'.
C2 noun /ˈsɪnəd/

synod

Meaning
An assembly of the clergy in a Christian church convened to decide on issues of doctrine or administration.
Example
The synod gathered to discuss reforms in the church.
C2 adjective əˈsɪd.ju.əs

assiduous

Meaning
Showing great care and perseverance; diligent and hardworking.
Example
His assiduous efforts led to a successful career.
C2 noun /ˌɪnsjəˈlærəti/

insularity

Meaning
The state of being isolated or narrow-minded.
Example
The insularity of the group prevented them from accepting new ideas.
C2 adjective rɪˈtɛn.tɪv

retentive

Meaning
Having strong memory or the ability to retain information for a long time.
Example
Students with a retentive memory excel in academics.
C2 noun /ˈbaɪpɛd/

biped

Meaning
An animal that walks on two feet.
Example
Humans are examples of biped creatures.
C2 noun /ˈʌndərlɪŋ/

underling

Meaning
a person of low rank or importance; a subordinate
Example
The manager ordered his underlings to finish the task quickly.
C2 noun /pəˈtruːn/

poltroon

Meaning
a cowardly person
Example
He acted like a poltroon during the crisis.
C2 adjective /ɪnˈvɪdiəs/

invidious

Meaning
likely to arouse resentment, envy, or anger in others
Example
The manager's invidious remarks created tension among the employees.
C2 noun /ˌbrɪɡ.əˈdɪər/

brigadier

Meaning
A military officer rank, usually commanding a brigade.
Example
The brigadier inspected the troops before the parade.
C2 noun /ˈbiːlaɪn/

beeline

Meaning
a straight, direct route to a destination
Example
He made a beeline for the food table as soon as he entered the party.
C2 noun /ɪˌlɛkˈtrɑː.lə.sɪs/

electrolysis

Meaning
A chemical decomposition produced by passing an electric current through a liquid or solution.
Example
Electrolysis is used to separate hydrogen from water.
C2 noun /ˈmɛtəfɔːrm/

metaphorm

Meaning
A coined or rare term sometimes used to describe a hybrid form of metaphor and form in literature or art.
Example
The poet introduced a metaphorm to blend imagery with structure.
C2 noun /ˈdɛrɪk/

derrick

Meaning
A framework or tower used for supporting a crane, especially for oil drilling or lifting heavy loads.
Example
The workers assembled a derrick at the oil drilling site.
C2 noun /ˈzel.ət/

zealot

Meaning
A person who is fanatical and uncompromising in pursuit of their ideals.
Example
He was considered a zealot for his strict political views.
C2 adjective /ˈdɪstəl/

distal

Meaning
situated away from the center of the body or from the point of attachment
Example
The doctor examined the distal end of the patient’s arm.
C2 adverb /əˈbɛd/

abed

Meaning
in bed
Example
She stayed abed all day due to illness.
C2 adjective /ˈsæ.loʊ/

sallow

Meaning
Of an unhealthy yellow or pale brown color, often referring to skin.
Example
His sallow complexion made him look tired and sickly.
C2 verb /ˈvæsɪleɪt/

vacillate

Meaning
to waver between different opinions or actions; be indecisive
Example
He vacillated between studying law and becoming a writer.
C2 noun /əˈfeɪ.ʒə/

aphasia

Meaning
a medical condition that causes loss of ability to speak or understand language
Example
After the stroke, she was diagnosed with aphasia.
C2 noun /fɪntʃ/

finch

Meaning
a small songbird with a short, stout bill
Example
A colorful finch perched on the branch singing sweetly.
C2 noun /ˈɒkjʊlɪst/

oculist

Meaning
An old-fashioned term for an eye doctor or ophthalmologist.
Example
The village oculist was known for treating various eye diseases.
C2 verb /ˈskærɪfaɪ/

scarify

Meaning
to make shallow cuts or scratches; to loosen the surface of soil
Example
The farmer scarified the soil before planting seeds.
C2 noun /ˈriːbəs/

rebus

Meaning
a puzzle in which words are represented by pictures, symbols, or letters
Example
The children enjoyed solving the rebus puzzles in the magazine.
C2 adjective /ˈtrʌŋkeɪtɪd/

truncated

Meaning
shortened by cutting off a part; cut short
Example
The meeting was truncated due to time constraints.
C2 noun /ˌɔːskʌlˈteɪʃən/

auscultation

Meaning
The act of listening to internal sounds of the body, typically using a stethoscope.
Example
The doctor performed auscultation to check the patient’s lungs.
C2 verb /bɪˈdɛk/

bedeck

Meaning
to decorate or adorn something in a showy way
Example
The hall was bedecked with flowers for the wedding.
C2 noun /ˌdʒiː.niˈæl.ə.ti/

geniality

Meaning
the quality of being friendly and cheerful
Example
His geniality made him popular among his colleagues.
C2 noun /ˈleʧ.ər/

Lecher

Meaning
a man who behaves in a sexually inappropriate way towards women
Example
The company fired him for being a lecher.
C2 adjective /ˈfraʊzi/

frowzy

Meaning
Unkempt, messy, or having a musty, unpleasant smell.
Example
He entered the room with a frowzy appearance after sleeping on the couch.
C2 noun /ruːθ/

ruth

Meaning
A feeling of pity, compassion, or sorrow.
Example
He felt no ruth for the people he had betrayed.
C2 noun /juːˌtrɑː.fɪˈkeɪ.ʃən/

eutrophication

Meaning
Excessive richness of nutrients in a lake or other body of water, frequently due to runoff from the land, which causes a dense growth of plant life and death of animal life from lack of oxygen.
Example
Excess fertilizers lead to eutrophication in lakes.
C2 noun /ˈʌn.dɚˌstɔː.ri/

understory

Meaning
The layer of vegetation beneath the main canopy of a forest.
Example
The understory of a rainforest is home to small mammals and insects.
C2 adjective /ˌhæfˈhɑːr.tɪd/

halfhearted

Meaning
lacking enthusiasm or determination; unenthusiastic
Example
His halfhearted attempt to study did not bring good results.
C2 noun /ˈsfɛrɔɪd/

spheroid

Meaning
A three-dimensional shape that is almost spherical but slightly flattened or elongated.
Example
The Earth is not a perfect sphere but an oblate spheroid.
C2 noun /ɪnˈtɛmpərəns/

intemperance

Meaning
Lack of moderation or self-control, especially with drinking or eating.
Example
His intemperance in drinking ruined his health.
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 /nɪt/

nit

Meaning
The egg or young form of a louse or other parasitic insect.
Example
The teacher noticed nits in the child’s hair.
C2 adjective /ɔːˈɡʌst/

august

Meaning
Respected and impressive; inspiring reverence or admiration.
Example
The king entered the hall with an august presence.
C2 adjective /ˌjuːləˈdʒɪstɪk/

eulogistic

Meaning
Expressing praise or admiration, often formally.
Example
The speaker gave a eulogistic account of the leader’s achievements.
C2 noun /lɒx/

loch

Meaning
a lake or sea inlet, especially in Scotland
Example
Tourists visit Loch Ness to search for the legendary monster.
C2 noun /ˈseɪpiəns/

sapience

Meaning
Wisdom or intelligence.
Example
Her sapience in solving problems earned her the respect of her colleagues.
C2 noun ˌpɜː.pɪˈtʃuː.ɪ.ti

perpetuity

Meaning
Permanence, eternity, continuity.
Example
The contract ensures payments in perpetuity.