penetrable
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C2 adjective /ˈpɛnɪtrəbl/

penetrable

Meaning
Capable of being passed through or entered.
Example
The thin wall was easily penetrable.
C2 adjective /ˌmækɪəˈvɛliən/

machiavellian

Meaning
cunning, scheming, and unscrupulous, especially in politics or in advancing one's career
Example
The politician was known for his Machiavellian tactics.
C2 adverb /əˈbæk/

Aback

Meaning
by surprise; unexpectedly
Example
I was taken aback by his sudden announcement.
C2 verb /prɪˈpɒndəreɪt/

preponderate

Meaning
To be greater in influence, weight, or number.
Example
In the debate, logical arguments preponderated over emotional appeals.
C2 adjective /fjuːˈɡeɪʃəs/

fugacious

Meaning
Lasting only a short time; fleeting or ephemeral.
Example
Youth is beautiful but fugacious.
C2 noun /ˌfoʊˈtɑːmɪtər/

photometer

Meaning
an instrument for measuring the intensity of light
Example
The scientist used a photometer to measure the light in the laboratory.
C2 noun /ˈmælɪt fɪʃ/

Mallet fish

Meaning
A marine fish with a hard shell-like covering, found in coastal waters
Example
The mallet fish is known for its unique protective shell covering.
C2 noun /ˈfɪl.ɪ.staɪn/

philistine

Meaning
a person who is indifferent or hostile to culture and the arts
Example
He was criticized as a philistine for dismissing modern art.
C2 noun /ˈsɒfɪzəm/

sophism

Meaning
a clever but misleading argument; fallacious reasoning
Example
The politician's speech was full of sophism designed to mislead voters.
C2 adjective /ʌnˈblʌʃɪŋ/

Unblushing

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

macrocosm

Meaning
The whole universe considered as a large, complex system; a large-scale representation of something.
Example
The macrocosm of the universe reflects the microcosm of human life.
C2 adjective /ˈkwɛrʊləs/

querulous

Meaning
Complaining in a whining or irritable manner.
Example
The querulous customer kept finding fault with every detail.
C2 verb /diːˈlɪmɪt/

delimit

Meaning
to fix the boundaries or limits of something
Example
The treaty was signed to delimit the borders of the two countries.
C2 noun /ˈrɛd.ə.ləns/

redolence

Meaning
a pleasant smell or the quality of suggesting something strongly
Example
The redolence of jasmine filled the evening air.
C2 noun /kəˈtæb.ə.lɪ.zəm/

catabolism

Meaning
The breakdown of complex molecules in living organisms to form simpler ones together with the release of energy; destructive metabolism.
Example
Catabolism plays a crucial role in cellular energy production.
C2 noun /ˈnaɪsəti/

nicety

Meaning
a fine or subtle detail, or a refined, delicate aspect of something
Example
The lawyer explained the legal niceties of the case.
C2 verb /diːˈmæɡnɪtaɪz/

demagnetize

Meaning
To remove or reduce the magnetic properties of something.
Example
The technician demagnetized the old cassette tape.
C2 noun /poʊˈzɜːr/

poseur

Meaning
A person who pretends to be something they are not, often to impress others.
Example
Many considered him a poseur because he exaggerated his accomplishments.
C2 noun /haɪˈdrɒl.ɪ.sɪs/

hydrolysis

Meaning
A chemical process that breaks down compounds by adding water, splitting complex molecules into simpler forms.
Example
Hydrolysis breaks down complex molecules into simpler forms.
C2 noun /oʊd/

ode

Meaning
a lyrical poem, often expressing praise or strong emotions
Example
The poet wrote an ode to the beauty of nature.
C2 noun /ˌhæŋ.ki ˈpæŋ.ki/

Hanky-Panky

Meaning
dishonest or suspicious activity; unethical behavior; trickery or deception
Example
The audit revealed some hanky-panky in the company's financial records.
C2 verb /deɪn/

deign

Meaning
to do something considered beneath one's dignity
Example
The king did not deign to reply to the commoner.
C2 noun /ˈɑːrbɪtər/

arbiter

Meaning
a person who has the authority to settle a dispute or decide an issue
Example
The principal acted as the arbiter in the conflict between the students.
C2 noun /ˈpeɪpəsi/

papacy

Meaning
The office or authority of the Pope in the Roman Catholic Church.
Example
The papacy played a significant role in medieval European politics.
C2 noun /ˈstrætədʒəm/

stratagem

Meaning
a plan or scheme designed to achieve a particular goal, often by trickery
Example
The general devised a clever stratagem to outwit the enemy.
C2 adjective /əˈvʌŋkjələr/

avuncular

Meaning
kind and friendly, like an uncle
Example
He had an avuncular manner that made everyone feel comfortable.
C2 adverb /ˌɛkspəˈdɪʃəsli/

expeditiously

Meaning
in a quick and efficient manner
Example
The application was processed expeditiously.
C2 noun /ˈvɜːrbiɪdʒ/

verbiage

Meaning
Excessive use of words, often with little content or meaning; wordiness.
Example
The contract was filled with unnecessary legal verbiage.
C2 noun ˈkɑː.dərz

cadres

Meaning
A small group of people specially trained for a particular purpose or profession; a group of activists in a communist or other political organization.
Example
There are 26 cadres under BPSC.
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 /luːˈbrɪsɪti/

lubricity

Meaning
the quality of being slippery or smooth; sometimes also refers to lewdness
Example
The lubricity of the surface made it difficult to walk on.
C2 noun /ˈʌmbrɪdʒ/

umbrage

Meaning
A feeling of resentment or offense.
Example
She took umbrage at his rude remark.
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.
C2 adjective hjʊˈrɪs.tɪk

heuristic

Meaning
Enabling a person to discover or learn something for themselves; experimental learning approach.
Example
Teachers use heuristic techniques to encourage self-learning.
C2 noun /lɒx/ or /lɒk/

lough

Meaning
An Irish or Scottish word for a lake or sea inlet.
Example
The fishermen lived by the lough for generations.
C2 noun /ˈæntɪk/

antic

Meaning
a playful, funny, or silly act or gesture
Example
The children laughed at the clown’s antics.
C2 noun /ruːd/

rood

Meaning
a crucifix, especially one positioned above the entrance to the chancel of a church
Example
The old church displayed a carved rood above the altar.
C2 adjective /sɪˈnæp.tɪk/

synaptic

Meaning
Related to the signal transmission process between nerve cells.
Example
Learning strengthens synaptic connections in the brain.
C2 noun /ˌkɑːnfɔːrˈmeɪʃən/

conformation

Meaning
The shape, structure, or arrangement of something.
Example
The scientist studied the molecular conformation of the protein.
C2 verb /ɪkˈstɛmpəraɪz/

extemporize

Meaning
To speak or perform without preparation; improvise.
Example
The actor had to extemporize when he forgot his lines.
C2 noun (plural) /ˈlɪniəmənts/

lineaments

Meaning
The features or distinctive characteristics of the face or body.
Example
The lineaments of his face were sharp and stern.
C2 noun /vɛkˈseɪʃən/

vexation

Meaning
the state of being annoyed, frustrated, or worried
Example
She could not hide her vexation after the repeated delays.
C2 noun /prɪˈsɛʃən/

precession

Meaning
The slow movement of the axis of a spinning body around another axis, often referring to Earth's rotation.
Example
Astronomers study the precession of the equinoxes.
C2 noun /moʊˈtɪləti/

motility

Meaning
The ability of an organism or cell to move independently.
Example
The motility of sperm is crucial for successful fertilization.
C2 noun, verb /ˈkaʊntərˌtʃɑːrdʒ/

countercharge

Meaning
an opposing charge or accusation; to make an opposing attack
Example
The lawyer filed a countercharge against the accuser.
C2 noun /ˌɛpɪzəʊˈɒtɪk/

epizootic

Meaning
An outbreak of disease affecting many animals of one kind at the same time.
Example
The farmer feared an epizootic might wipe out his cattle.
C2 noun /ˈdaɪətraɪb/

diatribe

Meaning
A forceful and bitter verbal attack against someone or something.
Example
The politician launched a diatribe against his opponents.
C2 verb /ˈtæri/

tarry

Meaning
To delay or linger; to stay longer than intended.
Example
Do not tarry, or you will miss the train.
C2 noun /loʊm/

loam

Meaning
Fertile soil mixture of sand, clay, and organic matter.
Example
Loam soil is ideal for agriculture due to its nutrient content.
C2 noun /pæˈstiːʃ/

pastiche

Meaning
a work of art, literature, or music that imitates the style of another artist, period, or genre
Example
The film was a clever pastiche of 1950s detective movies.
C2 adjective /ˈfiːbraɪl/

febrile

Meaning
having or showing the symptoms of a fever; or highly excitable or agitated
Example
The patient was in a febrile state with high temperature.
C2 adjective /ˈmeɪndʒi/

mangy

Meaning
in poor condition, shabby, dirty, or affected by mange
Example
The stray dog looked mangy and weak.
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 /rɪˈkɒɡnɪzəns/

recognizance

Meaning
A legal obligation or bond entered into before a court, especially to ensure future appearance.
Example
He was released on his own recognizance.
C2 adjective /ˈblɪŋkəd/

blinkered

Meaning
Having a limited or narrow outlook; unable or unwilling to consider other perspectives.
Example
His blinkered attitude stopped him from seeing the bigger picture.
C2 adjective /əˈkɪliən/

achillean

Meaning
like or characteristic of Achilles; strong but vulnerable
Example
His achillean pride made him blind to danger.
C2 verb /rɛnd/

rend

Meaning
to tear something apart violently or forcefully
Example
The explosion rent the air with a deafening noise.
C2 noun /ˈfiːəlti/

fealty

Meaning
loyalty or allegiance, especially to a sovereign or lord
Example
The knight swore fealty to his king.
C2 noun /ˈɡleɪziər/

glazier

Meaning
a person whose job is to fit glass into windows and doors
Example
The glazier repaired the broken window in our house.
C2 noun /rɪˈpʌɡ.nəns/

repugnance

Meaning
intense disgust or strong aversion towards something
Example
She felt deep repugnance at the cruelty of the act.
C2 noun /ˌɑːrbəˈriːtəm/

arboretum

Meaning
a place where trees, shrubs, and plants are grown for scientific study or public display
Example
We visited the city’s arboretum to learn about exotic trees.
C2 verb /rɪˈkwaɪt/

requite

Meaning
to return or repay a favor, service, or feeling
Example
She requited his kindness with a thoughtful gift.
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.
C2 verb /drɔːl/

drawl

Meaning
to speak in a slow, lazy way with prolonged vowel sounds
Example
He tends to drawl when he is tired.
C2 noun /ˈnaɪəlɪst/

nihilist

Meaning
A person who rejects all religious and moral principles, often believing that life is meaningless.
Example
He was called a nihilist for rejecting all social norms.
C2 adjective /əˈkɜːrsɪd/

accursed

Meaning
Doomed, detestable, or under a curse.
Example
The villagers avoided the accursed house on the hill.
C2 noun /ˈnaɪɪˌlɪzəm/

nihilism

Meaning
The rejection of all religious and moral principles, often in the belief that life is meaningless.
Example
The philosopher was criticized for promoting nihilism.
C2 noun /ˈlændˌhoʊl.dər/

landholder

Meaning
a person who owns land, especially in large amounts
Example
The landholder leased part of his property to local farmers.
C2 adjective /ˈfɛkləs/

feckless

Meaning
lacking initiative or strength of character; irresponsible
Example
His feckless attitude at work caused several missed deadlines.
C2 noun /dɪˈpoʊnənt/

deponent

Meaning
A person who gives testimony under oath, especially in a written deposition.
Example
The deponent confirmed the accuracy of the statement during the trial.
C2 adjective /dæŋk/

dank

Meaning
unpleasantly damp and cold
Example
The basement was dark and dank, filled with a musty smell.
C2 noun /ˈbɛlˌwɛðər/

bellwether

Meaning
A person or thing that leads or indicates a trend.
Example
The company is seen as a bellwether of the technology industry.
C2 adjective /ˈbrækɪʃ/

brackish

Meaning
Slightly salty, often describing water that is a mix of fresh and seawater.
Example
The river estuary contained brackish water.
C2 noun /ɡlʌt/

glut

Meaning
An excessive supply of something; more than is needed.
Example
There was a glut of cheap smartphones in the market.
C2 verb /ˈfɛtər/

fetter

Meaning
to restrain or restrict someone’s freedom
Example
The strict rules fettered the creativity of the students.
C2 noun, adjective, verb /ˈrɛprəˌbeɪt/

reprobate

Meaning
A person of immoral character; to express disapproval of; morally corrupt.
Example
The old reprobate spent his days gambling and drinking.
C2 verb /ˈbaɪfərˌkeɪt/

bifurcate

Meaning
to divide into two branches or parts
Example
The road bifurcates into two separate paths at the hill.
C2 noun /pɪˈnɒlədʒi/

penology

Meaning
The study of prison management and criminal rehabilitation.
Example
He decided to specialize in penology to help improve the prison system.
C2 noun /ˈdɛswɪˌtuːd/

desuetude

Meaning
a state of disuse or inactivity
Example
The old law has fallen into desuetude.
C2 noun /rɪˈfɛkʃən/

refection

Meaning
a meal or the act of taking food and drink
Example
The monks gathered for their evening refection.
C2 verb /koʊˈhɪr/

cohere

Meaning
To stick together; to be united logically or physically.
Example
The ideas in his essay cohere well.
C2 adjective /ˈfʌŋɡəs/

fungous

Meaning
relating to or resembling a fungus
Example
The damp basement had a fungous smell.
C2 adjective ɪnˈdɒm.ɪ.tə.bəl

indomitable

Meaning
Impossible to subdue or defeat.
Example
Her indomitable spirit helped her overcome adversity.
C2 adjective /kəˈrɛlətɪv/

correlative

Meaning
having a mutual relationship; corresponding
Example
The increase in temperature is correlative with the melting of glaciers.
C2 adjective /ˈeksɪkrəbl/

execrable

Meaning
Extremely bad or unpleasant.
Example
The movie was so execrable that many people left the theater early.
C2 noun /ˈdɛkəˌɡɒn/

decagon

Meaning
A polygon with ten sides and ten angles.
Example
The geometry teacher drew a perfect decagon on the board.
C2 noun /ˈfʌstɪən/

fustian

Meaning
pompous or pretentious speech or writing; originally a type of thick cloth
Example
The politician's speech was filled with fustian and empty promises.
C2 noun /ˌpætrəˈnɪmɪk/

patronymic

Meaning
a name derived from the name of a father or ancestor
Example
In many cultures, surnames are patronymic in origin.
C2 noun /ˈlɒkətɪv/

locative

Meaning
a grammatical case indicating location or place
Example
In Latin, the locative case is used to indicate location.
C2 noun /ˈbeɪleɪ/

Bele

Meaning
a type of freshwater fish found in South Asian rivers, known for its distinctive appearance
Example
The bele fish is commonly caught in the rivers of Bangladesh.
C2 noun /ˈɒksɪdənt/

occident

Meaning
The countries of the West, especially Europe and America.
Example
The Occident has a long history of philosophical thought.
C2 adjective /ˈbuːtləs/

bootless

Meaning
Useless or futile; of no benefit.
Example
His bootless attempt to fix the machine only wasted time.
C2 adjective /ˈhæl.si.ən/

halcyon

Meaning
calm, peaceful, and happy; denoting a period of time in the past that was idyllically happy and peaceful
Example
She often reminisces about the halcyon days of her childhood.
C2 adjective /ˈtɔɪl.səm/

toilsome

Meaning
Involving hard or exhausting work; laborious.
Example
The workers had a toilsome day in the hot sun.
C2 adjective /ˈsmɑːrmi/

smarmy

Meaning
Excessively flattering or ingratiating, often insincerely.
Example
The salesman gave a smarmy pitch that felt fake.
C2 noun /rɛtʃ/

wretch

Meaning
an unfortunate or miserable person; a despicable or contemptible person
Example
The poor wretch was left out in the cold with no shelter.
C2 verb /əˈsɛvəˌreɪt/

asseverate

Meaning
to affirm or declare positively and earnestly
Example
He asseverated that he had never seen the man before.
C2 noun /ˌpriːpəˈzɛʃən/

prepossession

Meaning
An opinion or feeling formed beforehand; a prejudice or preoccupation.
Example
His prepossession in favor of tradition made him resist change.
C2 noun /ˌpaɪroʊˈmeɪniæk/

pyromaniac

Meaning
A person with an uncontrollable desire to set things on fire.
Example
The pyromaniac was arrested for setting several buildings ablaze.
C2 noun (plural) /ˌmæk.ɪˈneɪ.ʃənz/

machinations

Meaning
complicated and secret plans, often intended to cause harm
Example
The politician was brought down by his own machinations.
C2 noun ˈɛn.ɡræm

Engram

Meaning
Physical signs or patterns in the brain for memory storage and retrieval
Example
Scientists study engrams to understand how memories are stored.
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 noun /laʊs/

Louse

Meaning
a small insect that lives on the hair or skin of people or animals
Example
The child had a louse in his hair.
C2 verb /dɪsˈteɪn/

distain

Meaning
to treat with scorn or contempt (archaic form of disdain)
Example
He would never distain those who had less fortune than him.
C2 adjective /ˈdɛsɪkeɪtɪd/

desiccated

Meaning
completely dried, having had all moisture removed
Example
The museum displayed desiccated specimens of plants.
C2 noun /ˈvɔːdəvɪl/

vaudeville

Meaning
A type of entertainment popular in the early 20th century, featuring a mixture of comedy, song, dance, and variety acts.
Example
The vaudeville show included comedians, magicians, and dancers.
C2 noun /əˈfreɪ/

affray

Meaning
A public fight or noisy disturbance that causes alarm.
Example
The police were called to break up an affray outside the stadium.
C2 noun /ˈɡændər/

Gander

Meaning
male goose
Example
The gander protected his family from the approaching dog.
C2 noun /ˈklæpər/

clapper

Meaning
The free-swinging metal piece inside a bell that strikes it to produce sound.
Example
The clapper inside the bell was broken.
C2 adjective /ʌnˈkɒnʃənəbl/

unconscionable

Meaning
shockingly unfair or unreasonable
Example
The company made unconscionable profits from the crisis.
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 adjective /tɒnˈsɔːriəl/

tonsorial

Meaning
relating to barbers or hairdressing
Example
The town's new barber offered a wide range of tonsorial services.
C2 noun /sʌbˈɔːl.tən/

subaltern

Meaning
A person holding a subordinate position; in the military, a junior officer.
Example
The subaltern was responsible for leading a small platoon of soldiers.
C2 noun /kəˈpriːs/

caprice

Meaning
a sudden, unpredictable change of mood or behavior
Example
She bought the expensive dress on a caprice.
C2 adjective /rɪˈdaʊ.tə.bəl/

redoubtable

Meaning
formidable, especially as an opponent; inspiring fear or respect
Example
She was a redoubtable leader who commanded respect from all.
C2 adjective /koʊˈtɜːr.mɪ.nəs/

coterminous

Meaning
having the same boundaries or extent in space, time, or meaning
Example
The two jurisdictions are coterminous, sharing the same borders.
C2 verb /ˌsuːpərˈhiːt/

superheat

Meaning
to heat a substance beyond its normal boiling point without it becoming vapor
Example
Engineers superheat the steam to increase the efficiency of the turbine.
C2 adjective /əˈsɜːrbɪk/

acerbic

Meaning
sharp, harsh, or bitter in tone or taste
Example
His acerbic comments offended many people in the meeting.
C2 verb /əkˈsiːd/

accede

Meaning
to agree to a request, proposal, or demand; to assume an office or position
Example
The government finally acceded to the demands of the protesters.
C2 adverb /əˈmʌk/

amuck

Meaning
in a frenzied, uncontrolled, or chaotic manner
Example
The bull ran amuck through the village.
C2 adjective /ˌɪnkɔːrˈpɔːriəl/

incorporeal

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