Vacillation
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C2 noun /ˌvæs.ɪˈleɪ.ʃən/

Vacillation

Meaning
the inability to decide between different opinions or actions; indecision
Example
His constant vacillation between career choices frustrated his parents.
C2 adjective /ɪnˈdɛkərəs/

indecorous

Meaning
Not in keeping with good taste and propriety; improper.
Example
His indecorous behavior shocked the audience.
C2 noun /frɒnd/

frond

Meaning
A large, divided leaf of a fern, palm, or similar plant.
Example
The fern's frond stretched gracefully over the garden path.
C2 noun /ˈkɒn.tjʊ.mə.li/

contumely

Meaning
insulting or humiliating treatment
Example
He endured the contumely of his colleagues with patience.
C2 adjective /ˈpɛkənt/

peccant

Meaning
Guilty of a moral offense or wrongdoing; sinful.
Example
The judge declared the peccant official unfit for office.
C2 noun /əˈspɜːr.ʒən/

aspersion

Meaning
An attack on the reputation or integrity of someone.
Example
He cast an aspersion on her character.
C2 adjective /krʌˈsteɪʃəs/

crustaceous

Meaning
relating to or having a hard shell like a crustacean
Example
The scientist studied the crustaceous fossils.
C2 noun /ˌhjuː.mɪ.fɪˈkeɪ.ʃən/

humification

Meaning
The process of organic matter decomposition to form humus in soil.
Example
Humification enhances soil structure and fertility.
C2 adjective /ˈfiːbəlˌmaɪndɪd/

feebleminded

Meaning
lacking intelligence or mental capacity; foolish or weak-minded
Example
The feebleminded man struggled to understand basic instructions.
C2 adjective/noun /haɪˈbɜːrniən/

hibernian

Meaning
Relating to Ireland or the Irish.
Example
He enjoyed reading about Hibernian culture and history.
C2 adjective /ˈdʒɒkənd/

jocund

Meaning
cheerful and lighthearted
Example
They walked together in a jocund mood after the celebration.
C2 adjective /ˌækwiˈɛsənt/

acquiescent

Meaning
ready to accept something without protest, or to do what someone else wants
Example
He gave an acquiescent smile and agreed to the plan.
C2 noun /ˈhɒdʒ.pɒdʒ/

hodgepodge

Meaning
A confusing mixture of different things; a jumble.
Example
The essay was a hodgepodge of unrelated ideas.
C2 noun /stɛp/

steppe

Meaning
A large flat area of unforested grassland, especially in southeastern Europe or Siberia.
Example
The nomads traveled across the vast steppe with their herds.
C2 noun /ˈbɒdɪs/

bodice

Meaning
the part of a woman's dress that covers the body from the neck to the waist
Example
She wore a dress with an embroidered bodice.
C2 adjective /ˈɛksɪdʒənt/

exigent

Meaning
demanding immediate action or attention; urgent
Example
The patient’s exigent condition required immediate surgery.
C2 adjective /dɪˈkɔːrəs/

decourous

Meaning
characterized by propriety, good taste, and proper manners
Example
She maintained a decourous silence during the ceremony.
C2 noun /əˈbaɪdəns/

abidance

Meaning
the act of following, accepting, or complying with something
Example
Her abidance by the rules impressed the committee.
C2 noun, verb /ˈpɑːrli/

parley

Meaning
a discussion between opposing sides, especially to negotiate terms
Example
The generals met to parley over the terms of surrender.
C2 adjective /fækˈtɪʃəs/

factitious

Meaning
artificial or fabricated; not natural or genuine
Example
The excitement in his story seemed factitious and forced.
C2 verb /ɪkˈspɒstjʊleɪt/

expostulate

Meaning
to express strong disapproval or disagreement
Example
She expostulated with her friend about the risky decision.
C2 noun kənˌsep.tʃu.ə.laɪˈzeɪ.ʃən

conceptualization

Meaning
The process of forming a concept or idea; the process of developing something in the mind.
Example
The conceptualization of renewable cities is groundbreaking.
C2 noun /ˈwɒntənnəs/

wantonness

Meaning
The quality of being reckless, cruel, or deliberately malicious.
Example
His wantonness shocked everyone at the gathering.
C2 adjective /ˌmædʒɪˈstɪəriəl/

magisterial

Meaning
Having the characteristics of a master or authority; commanding and dignified.
Example
The professor spoke in a magisterial tone during the lecture.
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 /ˈbɜːrdʒɪs/

burgess

Meaning
A citizen of a town or borough with full rights of citizenship.
Example
In medieval times, a burgess had the right to vote and hold property.
C2 verb /əˈvʌls/

avulse

Meaning
to tear away or separate forcibly, especially in medical or geological contexts
Example
The surgeon had to avulse the damaged tissue during the operation.
C2 verb /ˈwɛltər/

welter

Meaning
to roll or toss about in a confused or disorderly way; to be in turmoil
Example
The city weltered in chaos after the sudden blackout.
C2 noun /neɪv/

nave

Meaning
the central part of a church building intended to accommodate the congregation
Example
The choir sang beautifully in the church nave.
C2 noun /ˈæpəfθɛm/

apophthegm

Meaning
A short, pithy, and instructive saying or maxim.
Example
She always had a witty apophthegm to share at meetings.
C2 noun /ˈtrɪp.lɪ.kət/

triplicate

Meaning
A set of three identical copies of something.
Example
The documents were prepared in triplicate for official use.
C2 adjective /ˈpɛstɪlənt/

pestilent

Meaning
Causing or tending to cause death or destruction; harmful or pernicious.
Example
The pestilent atmosphere of the swamp made people sick.
C2 adjective /ˈsʌmp.tʃuˌɛr.i/

sumptuary

Meaning
Relating to laws or regulations intended to limit personal spending on luxury goods.
Example
In medieval Europe, sumptuary laws restricted the wearing of expensive fabrics to the nobility.
C2 verb /bɪˈmjuːz/

bemuse

Meaning
To confuse or puzzle someone.
Example
The complex instructions bemused the new employees.
C2 adjective /ɪˈkwɪvəkəl/

equivocal

Meaning
Open to more than one interpretation; ambiguous.
Example
His equivocal answer confused everyone.
C2 adjective /ˌnɒnˈtrɪviəl/

nontrivial

Meaning
Not simple or easy; requiring effort or significant thought.
Example
Solving the equation turned out to be a nontrivial task.
C2 noun /ˈbæn.jən/

Banian

Meaning
a sleeveless undergarment worn next to the skin; vest
Example
He put on a cotton banian under his shirt.
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 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 /ˈiːɒn/ or /ˈiːən/

aeon

Meaning
An indefinitely long period of time; an age or eternity.
Example
Dinosaurs roamed the Earth millions of aeons ago.
C2 noun /kənˈkɔːrdəns/

concordance

Meaning
Agreement; also an alphabetical index of the principal words in a book.
Example
There is a strong concordance between the two reports.
C2 noun ˌiːkwəˈnɪməti

equanimity

Meaning
Mental calmness, composure, and evenness of temper, especially in a difficult situation.
Example
She handled the news with remarkable equanimity.
C2 adjective /luːˈɡuːbriəs/

lugubrious

Meaning
looking or sounding sad and dismal
Example
His lugubrious expression made everyone feel uneasy.
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 noun /ˌkɒntrəpəˈzɪʃən/

contraposition

Meaning
the act of placing two things in opposition for contrast or comparison
Example
The contraposition of the two theories highlighted their differences.
C2 adjective /ˈɛstɪməbl/

estimable

Meaning
Worthy of great respect.
Example
Her estimable achievements inspired the whole community.
C2 noun/verb /ɡraʊtʃ/

grouch

Meaning
a person who complains a lot or to complain in a grumpy way
Example
He is such a grouch in the morning before coffee.
C2 verb ˈɑːb.fə.skeɪt

obfuscate

Meaning
Render obscure, unclear, or unintelligible.
Example
Politicians often obfuscate facts to mislead people.
C2 noun /ˈwɪtɪˌsɪzəm/

witticism

Meaning
a clever or funny remark
Example
Her witticism made everyone laugh during the meeting.
C2 noun /ˈklaʊdˌbɜːrst/

cloudburst

Meaning
a sudden and very heavy rainfall
Example
The picnic was ruined by a sudden cloudburst.
C2 verb /bɪˈhuːvz/

behooves

Meaning
third person singular form of 'behoove'; means it is proper or necessary
Example
It behooves every citizen to follow the law.
C2 noun /ˈskɜː.vi/

scurvy

Meaning
A disease caused by a deficiency of vitamin C, leading to weakness, gum disease, and bleeding.
Example
Sailors often suffered from scurvy during long sea voyages without fresh fruits.
C2 noun /ˌæpəˈrɪʃən/

apparition

Meaning
A ghostly figure or an unusual or unexpected appearance.
Example
The children were frightened by the sudden apparition in the old house.
C2 adjective /ɪmˈpɑːlɪtɪk/

impolitic

Meaning
Unwise or imprudent; not showing good judgment.
Example
It would be impolitic to criticize them openly.
C2 noun /ˌbeɪt ˈnwɑːr/

bete noire

Meaning
A person or thing that one particularly dislikes or fears.
Example
Grammar has always been his bete noire.
C2 noun /ˌrep.ɑːˈtiː/

Repartee

Meaning
conversation or speech characterized by quick, witty comments or replies
Example
The dinner party was filled with brilliant repartee between the guests.
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 /mɪˌsɛdʒəˈneɪʃən/

miscegenation

Meaning
the interbreeding of people considered to be of different racial types
Example
The law once prohibited miscegenation in many countries.
C2 verb /ˈmæstɪkeɪt/

masticate

Meaning
to chew food thoroughly before swallowing
Example
He slowly masticated the bread before swallowing.
C2 noun ˈɒpjʊləns

opulence

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

guileless

Meaning
Innocent and without deceit
Example
Her guileless smile won everyone’s heart.
C2 adjective /kənˈtraɪt/

contrite

Meaning
feeling or showing remorse or guilt
Example
She was contrite after realizing her mistake.
C2 adjective /ˈvælərəs/

valorous

Meaning
showing great courage and bravery
Example
The valorous soldier led his troop into battle without hesitation.
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 verb /ˈmʌfəl/

muffle

Meaning
to make a sound quieter or less distinct; to cover or wrap something to reduce noise or warmth
Example
She tried to muffle her laughter with a scarf.
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 verb /ˈɡæmbəl/

gambol

Meaning
to run or jump about playfully
Example
The lambs gamboled in the field under the sun.
C2 noun /ɪkˌsprəʊ.priˈeɪ.ʃən/

expropriation

Meaning
The act of government taking private property, also known as confiscation, nationalization, or seizure.
Example
The land expropriation led to disputes among landowners.
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 /ɪˈrʌp.ʃən/

Irruption

Meaning
a sudden violent entry; an invasion or raid; a sudden outburst or eruption
Example
The army's irruption into enemy territory caught the opposing forces completely off guard.
C2 adjective /ʌnˈmɪtɪɡeɪtɪd/

unmitigated

Meaning
absolute; not lessened or moderated
Example
The meeting was an unmitigated disaster.
C2 verb /læmˈbæst/

lambast

Meaning
To criticize harshly or to beat severely.
Example
The coach lambasted the team for their poor performance.
C2 verb /ˈhæroʊ/

harrow

Meaning
to cause distress or torment; also to break up and smooth soil with a farm tool
Example
The tragic news harrowed the entire family.
C2 adjective /ɔːˈrɪfərəs/

auriferous

Meaning
Containing or producing gold.
Example
The miners discovered an auriferous vein in the mountains.
C2 verb /səbˈsjuːm/

subsume

Meaning
To include or absorb something into a larger group or category.
Example
Minor details were subsumed under the main topic.
C2 noun /bɪˈhiː.mɒθ/

behemoth

Meaning
Something enormous, especially a large and powerful organization.
Example
The company grew into a corporate behemoth.
C2 noun /ˈmʌŋɡrəl/

mongrel

Meaning
A dog of mixed breed; sometimes used to describe something mixed or of inferior quality.
Example
The stray dog was a friendly mongrel.
C2 verb /haɪˈpɒθɪkeɪt/

hypothecate

Meaning
to pledge something, such as property, as security for a debt without giving up possession of it.
Example
The company hypothecated its assets to secure the loan.
C2 noun /flɛk/

fleck

Meaning
a small spot or mark, often of a different color
Example
There was a fleck of paint on the floor.
C2 noun /ˌkɒməˈsɛəriət/

commissariat

Meaning
A department responsible for supplying food and equipment, especially in the military.
Example
The army commissariat ensured that the soldiers had enough supplies.
C2 adjective /ˈɪn.dɪ.dʒənt/

indigent

Meaning
lacking the necessities of life due to poverty; very poor
Example
The hospital offers free care to indigent patients.
C2 verb /ˈprɛsɪdʒ/

presage

Meaning
to be a sign or warning that something will happen; to foreshadow
Example
Dark clouds presage a storm.
C2 noun /brəˈvjʊrə/

bravura

Meaning
a display of great skill and brilliance, especially in music or performance
Example
The pianist delivered a bravura performance that left the audience spellbound.
C2 noun /ˈɔːfəl/

offal

Meaning
the internal organs and entrails of an animal used as food; waste parts
Example
The butcher prepared sausages using pork offal.
C2 verb /ˈvɛdʒɪteɪt/

vegetate

Meaning
to live in a dull, inactive, or unchallenging way, often with little physical or mental effort
Example
He spent his vacation vegetating on the couch in front of the TV.
C2 adjective /fjuːˈnɪəriəl/

funereal

Meaning
having the mournful, somber character of a funeral
Example
The room was filled with a funereal silence after the announcement.
C2 noun /pəˈtruːn/

poltroon

Meaning
a cowardly person
Example
He acted like a poltroon during the crisis.
C2 noun, verb /ˈhæmstrɪŋ/

hamstring

Meaning
a tendon at the back of the thigh; as a verb, to cripple or severely restrict the effectiveness of someone or something.
Example
Budget cuts hamstrung the organization’s plans.
C2 verb /ˌriːkruːˈdɛs/

recrudesce

Meaning
to break out or appear again after a period of dormancy or decline
Example
After months of calm, violence recrudesced in the region.
C2 adjective /suːˈpɜːrnəl/

supernal

Meaning
Relating to the heavens; celestial or divine.
Example
The painting captured a supernal beauty that felt otherworldly.
C2 noun /naɪt ˈdʒæz.mɪn/

Night-jesmine

Meaning
a fragrant flowering tree that blooms at night with small white flowers
Example
The night-jasmine tree blooms only after sunset with its tiny white flowers.
C2 adjective /rɪˈmɪs/

remiss

Meaning
Negligent in performing a duty or responsibility.
Example
The manager was remiss in not checking the financial reports carefully.
C2 noun/adjective /prɪˈsɪpɪtənt/

precipitant

Meaning
As a noun: a substance that causes a substance to be deposited from a solution; as an adjective: acting hastily or impulsively.
Example
The chemist added a precipitant to the solution to observe the reaction.
C2 noun /niˈɒlədʒi/

neology

Meaning
The use of new words or the study of their origin.
Example
The professor specialized in neology, studying the creation of modern slang.
C2 noun /ˈoʊɡər/

ogre

Meaning
A mythical monster, often depicted as large, hideous, and cruel; metaphorically, a cruel or terrifying person.
Example
The villagers feared the ogre who lived in the dark forest.
C2 verb /dɪˈnjuːd/

denude

Meaning
to strip something of its covering, possessions, or assets
Example
The forest was denuded of trees by illegal logging.
C2 noun /ˈkæl.əm.ni/

Calumny

Meaning
the making of false and defamatory statements about someone in order to damage their reputation
Example
The politician sued the newspaper for spreading calumny about his personal life.
C2 adjective, noun /səbˈmɜːrsəbl/

submersible

Meaning
capable of being submerged; a small underwater craft
Example
The scientists explored the deep ocean using a submersible.
C2 noun /rɪˈfrækʃən/

refraction

Meaning
The bending of light, sound, or other waves when they pass from one medium to another of different density.
Example
The refraction of light in water makes objects appear bent.
C2 verb /ˈproʊtjuːbəreɪt/

protuberate

Meaning
To swell out or bulge.
Example
The roots began to protuberate from the ground.
C2 noun /kəˈbɑːdi/

kabadi

Meaning
a person who collects and sells scrap or recyclable materials, especially in South Asia
Example
The kabadi came every week to collect old newspapers and bottles.
C2 adverb /ˌɪnsəʊˈmʌtʃ/

insomuch

Meaning
to such an extent
Example
He was insomuch tired that he could hardly stand.
C2 verb /ˈdɒɡmətaɪz/

dogmatize

Meaning
To state opinions or beliefs as if they were absolute truths.
Example
The professor tended to dogmatize on political issues.
C2 noun /ˈklɔɪstər/

cloister

Meaning
a covered walk in a convent, monastery, or cathedral, typically with a wall on one side and a colonnade open to a quadrangle on the other.
Example
The monks walked silently through the cloister.
C2 noun /ˈdiːɪst/

deist

Meaning
a person who believes in the existence of a supreme being but rejects organized religion
Example
The philosopher identified himself as a deist.
C2 noun /ˈpɜːrljuː/

purlieu

Meaning
The area near or surrounding a place; an outlying or neighboring district.
Example
They spent the afternoon exploring the purlieus of the ancient city.
C2 verb /skʌlk/

skulk

Meaning
to move or hide secretly, often because you are planning something bad or are feeling guilty
Example
He tried to skulk in the shadows to avoid being seen.
C2 adjective /ɡrɪˈɡɛəriəs/

gregarious

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

nonpareil

Meaning
Having no equal; unrivaled or matchless.
Example
Her beauty was considered nonpareil in the region.
C2 noun /sælv/

salve

Meaning
An ointment used to promote healing of the skin or as protection.
Example
She applied a salve to the burn on her hand.
C2 noun /haɪˈdrɒmɪtər/

hydrometer

Meaning
An instrument used to measure the density or specific gravity of liquids.
Example
The brewer used a hydrometer to test the sugar content of the solution.
C2 adjective /lɪˈtɪdʒəs/

litigious

Meaning
prone to engage in lawsuits or overly inclined to argue legally
Example
He is known as a litigious neighbor who often sues people.
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 verb /lɪr/

leer

Meaning
To look at someone in an unpleasant, sly, or sexually suggestive way.
Example
He leered at her in a way that made her uncomfortable.
C2 noun /aɪˈoʊtə/

iota

Meaning
An extremely small amount.
Example
He did not show an iota of fear.
C2 noun /ˈvaɪnəri/

vinery

Meaning
A place where vines are cultivated, especially a vineyard or greenhouse for vines.
Example
The old vinery was filled with grapevines.
C2 noun /ˈteɪbər/

Tabour

Meaning
a small side drum or tambourine used especially in folk music
Example
The folk musician played a lively tune on his tabour.
C2 noun ˌmʌltɪˈfæsɪtɪd ˌɪnfərˈmeɪʃən ˈfreɪmwɜːrks

multifaceted information frameworks

Meaning
Complex, comprehensive structures for organizing and managing information that have multiple aspects or dimensions.
Example
Digital literacy involves building multifaceted information frameworks.
C2 noun /ˈæltruɪst/

altruist

Meaning
a person who has an unselfish concern for the welfare of others
Example
He is an altruist who always puts others' needs before his own.
C2 noun /sɪˈdɪʃ.ən/

Sedition

Meaning
conduct or speech inciting people to rebel against authority; treason
Example
The activist was charged with sedition for his inflammatory speeches.
C2 verb /ˈræpsəˌdaɪz/

rhapsodize

Meaning
to speak or write with great enthusiasm and admiration
Example
He would often rhapsodize about his travels to Europe.