abstruse
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C2 adjective /æbˈstruːs/

abstruse

Meaning
Difficult to understand; obscure.
Example
The abstruse nature of the philosophical debate left many confused.
C2 adjective /ˌdɛlɪˈkwɛsənt/

deliquescent

Meaning
tending to become liquid by absorbing moisture from the air
Example
Sugar is not deliquescent, but salt can be.
C2 adverb /ˌpɛlˈmɛl/

pell-mell

Meaning
In a confused, rushed, or disorderly manner.
Example
The children ran pell-mell through the playground.
C2 adjective fɔːˈtjuː.ɪ.təs

fortuitous

Meaning
Happening by accident or chance rather than design; lucky or fortunate.
Example
Their meeting was purely fortuitous.
C2 noun /ˈtɜːrpɪtuːd/

turpitude

Meaning
depraved or wicked behavior or character
Example
The judge condemned the criminal’s act of moral turpitude.
C2 noun /vɜːrˈtuː/

virtu

Meaning
a love of or taste for fine art, antiques, or curiosities
Example
The collector’s house was filled with objects of virtu.
C2 noun /əˈnjuː.ɪ.ti/

annuity

Meaning
a fixed sum of money paid to someone each year, typically for the rest of their life
Example
She receives an annuity from her late husband's insurance policy.
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 adjective /ʌnˈmɪtɪɡeɪtɪd/

unmitigated

Meaning
absolute; not lessened or moderated
Example
The meeting was an unmitigated disaster.
C2 noun /səˈɡæs.ə.t̬i/

sagacity

Meaning
The quality of being sagacious; having or showing keen mental discernment and good judgment.
Example
His sagacity made him a great leader.
C2 noun /miːd/

mead

Meaning
An alcoholic drink made from fermented honey and water.
Example
The Vikings were known to drink large amounts of mead during feasts.
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 adjective /ˈvɛəriəˌɡeɪtɪd/

variegated

Meaning
Having different colors, especially in irregular patches or streaks.
Example
The garden was full of variegated plants.
C2 noun /ˈmʌs.tərd liːf/

Mustard leaf

Meaning
green leafy vegetable from the mustard plant; edible leaves used in cooking
Example
We cooked mustard leaf with fish in a traditional Bengali curry.
C2 verb /ˌnɒnˈplʌst/

nonplused

Meaning
Past tense of nonplus; surprised and confused.
Example
She was completely nonplused by his sudden decision.
C2 noun /ˈbɛvi/

bevy

Meaning
A large group of people or things of a particular kind.
Example
A bevy of swans floated on the lake.
C2 verb /ˌsuːpərɪnˈtɛnd/

superintend

Meaning
to oversee and direct the work or operation of something
Example
She was hired to superintend the construction project.
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 /ˌkloʊs ˈhɔːld/

close-hauled

Meaning
of a sailing ship, sailing as nearly as possible towards the direction from which the wind is blowing.
Example
The yacht was close-hauled as it cut through the waves.
C2 verb /bɪˈweɪl/

bewail

Meaning
to express deep sorrow or regret over something; to mourn openly
Example
She bewailed the loss of her childhood home.
C2 adjective /ˌsuːpərˈæn.ju.eɪ.tɪd/

superannuated

Meaning
old and no longer useful or valid; retired due to age
Example
The factory was filled with superannuated machines that slowed production.
C2 adjective /səˈluːtəˌtɔri/

salutatory

Meaning
Relating to or expressing a greeting or an address, especially at the beginning of a speech.
Example
She delivered a salutatory address at the graduation ceremony.
C2 adjective /ɪkˌstɛmpəˈreɪniəs/

extemporaneous

Meaning
Spoken or done without preparation.
Example
He gave an extemporaneous speech at the meeting.
C2 verb /ˈsʌplɪˌkeɪt/

supplicate

Meaning
To ask for something earnestly or humbly, often in a religious context.
Example
The villagers supplicated the gods for rain during the drought.
C2 noun /ˈbʊljən/

bullion

Meaning
Gold or silver in bulk before being coined or made into jewelry.
Example
The bank stores gold bullion in its vaults.
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 adjective /ˈɡæŋ.ɡli/

gangly

Meaning
Tall, thin, and awkward in movement or appearance.
Example
The gangly teenager stumbled while trying to dance.
C2 noun /ˈæn.dʒi.əʊ.plæs.ti/

angioplasty

Meaning
A medical procedure to open blocked or narrowed blood vessels that supply blood to the heart.
Example
Angioplasty is now safer with robotic assistance.
C2 adjective/noun /ɪnˈkɑːrnədiːn/

incarnadine

Meaning
a bright crimson or pinkish-red color
Example
The sky turned incarnadine at sunset.
C2 verb /əˈsweɪdʒ/

assuage

Meaning
To make an unpleasant feeling less intense; to ease or relieve.
Example
The kind words helped assuage her anxiety.
C2 verb /ˈbɜːrnɪʃ/

burnish

Meaning
To polish something by rubbing; to enhance or improve.
Example
He burnished the old table until it shone.
C2 noun, verb /ˈfɪlɪˌbʌstər/

filibuster

Meaning
a tactic of delaying legislative action by prolonged speech; to use such a tactic
Example
The senator filibustered for hours to prevent the bill from passing.
C2 noun /əˈpɜːrtənəns/

appurtenance

Meaning
an accessory or supplementary part of something
Example
The garage is an appurtenance of the main house.
C2 noun /ˌɒktədʒəˈnɛəriən/

octogenarian

Meaning
A person who is between 80 and 89 years old.
Example
The octogenarian still jogs every morning to stay healthy.
C2 noun /ˈklævɪkəl/

clavicle

Meaning
the collarbone, a long bone that serves as a strut between the shoulder blade and the sternum
Example
He fractured his clavicle in the accident.
C2 noun /ˌæbnɪˈɡeɪʃən/

abnegation

Meaning
the act of renouncing or rejecting something, especially self-denial
Example
The monk’s life was one of complete abnegation of worldly pleasures.
C2 noun /ˈtuːb.roʊz/

Tube-rose

Meaning
a night-blooming flower with an intensely sweet fragrance, native to Mexico
Example
The tuberose flowers filled the evening air with their heavenly scent.
C2 adjective /ˈprəʊ.lɪks/

prolix

Meaning
using too many words; tediously lengthy
Example
The professor’s prolix lecture put many students to sleep.
C2 noun /ɡæsˈtraɪtɪs/

gastritis

Meaning
Inflammation of the lining of the stomach.
Example
The doctor diagnosed him with gastritis after his endoscopy.
C2 noun /boʊl/

boll

Meaning
The rounded seed capsule of plants such as cotton or flax.
Example
The farmer examined the cotton boll to check its quality.
C2 noun /dɪˌlæpɪˈdeɪʃən/

dilapidation

Meaning
The state of disrepair or ruin as a result of neglect.
Example
The old temple was in a state of dilapidation.
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 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 /ˈdʒɒlɪti/

jollity

Meaning
lively and cheerful activity or celebration
Example
The wedding was full of jollity and laughter.
C2 verb /əˈkluːd/

occlude

Meaning
To block or close up an opening or passage.
Example
The pipe was occluded by mineral deposits.
C2 noun /ˈɡraɪndstoʊn/

grindstone

Meaning
a thick disc of stone used for grinding, sharpening, or polishing tools
Example
The blacksmith sharpened his blade on the grindstone.
C2 adjective /ˌdɛl.ɪˈtɪə.ri.əs/

deleterious

Meaning
Causing physical or mental harm or damage.
Example
Smoking has deleterious effects on health.
C2 adjective /trænzˈæl.paɪn/

transalpine

Meaning
situated beyond or across the Alps, especially from the viewpoint of Italy
Example
The Romans referred to France as Transalpine Gaul.
C2 verb /ˈmɔːrtɪfaɪ/

mortify

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

impalpable

Meaning
unable to be felt by touch; difficult to grasp or understand
Example
There was an impalpable sense of fear in the room.
C2 adjective /ˈsɛpərəbəl/

separable

Meaning
Capable of being separated or divided.
Example
The two issues are separable and should be discussed independently.
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 verb /ɪnˈræptʃər/

enrapture

Meaning
To fill someone with great delight or joy.
Example
The beautiful music enraptured the audience.
C2 verb /bɪˈwɪtʃ/

bewitch

Meaning
to enchant or fascinate someone as if by magic
Example
The dancer's performance bewitched the audience.
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 /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 verb /ˈtʃæfɪŋ/

chaffing

Meaning
Teasing or joking in a lighthearted way.
Example
They were chaffing each other during lunch.
C2 noun /ˈdɪktəm/

dictum

Meaning
A formal pronouncement, authoritative statement, or maxim.
Example
The judge’s dictum clarified the principle of equality before the law.
C2 adjective /ˌvɛrɪˈsɪmɪlər/

verisimilar

Meaning
appearing to be true or real
Example
The story seemed verisimilar though it was entirely fictional.
C2 noun /hɒtʃ pɒtʃ/

Hotch potch

Meaning
A mixed dish; a hodgepodge of ingredients cooked together
Example
She made a delicious hotch potch with rice, lentils, and vegetables.
C2 noun /ˈsʌplɪkənt/

supplicant

Meaning
A person who humbly or earnestly asks for something, usually from a person of authority.
Example
The temple was filled with supplicants seeking blessings.
C2 noun /ˈɒnwiː/ or /ˈɑːnwiː/

ennui

Meaning
A feeling of boredom, listlessness, or dissatisfaction arising from lack of excitement.
Example
After weeks of doing nothing, he sank into a deep sense of ennui.
C2 adjective /tʃeɪst/

Chaste

Meaning
pure and morally good; abstaining from sexual activity
Example
She lived a chaste and virtuous life.
C2 adjective /ɔːˈrɔːrəl/

auroral

Meaning
Relating to or resembling the aurora, especially the northern lights.
Example
The scientists observed auroral activity in the night sky.
C2 adjective /ɪˈlɪmɪtəbl/

illimitable

Meaning
Without limits or bounds.
Example
The universe is often described as illimitable.
C2 /laɪð/

lithe

Meaning
thin, supple, and graceful in movement
Example
The lithe dancer captivated the audience with her graceful spins.
C2 noun /ˈsweɪʒən/

suasion

Meaning
the act of persuading or influencing someone
Example
The leader used gentle suasion to win support for the plan.
C2 noun /ˈpæntəˌskoʊp/

pantoscope

Meaning
An optical instrument that provides a wide or panoramic view.
Example
The scientist used a pantoscope to observe the entire horizon.
C2 verb /ˌdɪskəmˈbɑːbjuleɪt/

discombobulate

Meaning
to confuse or disconcert; to upset the normal order
Example
The sudden question seemed to discombobulate him.
C2 noun /ˌfɔːrɔːrdɪˈneɪʃən/

foreordination

Meaning
the act of determining something in advance; predestination
Example
The doctrine of foreordination suggests that events are fixed by divine will.
C2 adjective /ˈvɛndɪbəl/

vendible

Meaning
Capable of being sold; marketable.
Example
Only vendible products were displayed at the trade fair.
C2 adjective /ˈfʌndʒəbl/

fungible

Meaning
interchangeable; able to replace or be replaced by another identical item
Example
In finance, money is considered a fungible asset.
C2 noun (compound/erroneous entry) /ɪnˈɛksərəbl ɑːrmi/

inexorableinexorablearmy

Meaning
This appears to be a corrupted or concatenated form; interpreted as 'inexorable army' — an unstoppable or relentless force.
Example
The rebels feared the inexorable army approaching their stronghold.
C2 noun /skɪf/

skiff

Meaning
a small, light boat usually for one person
Example
The fisherman paddled his skiff across the lake.
C2 adjective /ˌkæləˈrɪfɪk/

calorific

Meaning
Relating to the amount of energy contained in food or fuel.
Example
Chocolate is highly calorific, so it should be eaten in moderation.
C2 noun /ɛnˈkoʊmiəm/

encomium

Meaning
A speech or piece of writing that praises someone or something highly.
Example
He delivered an encomium to his retiring teacher.
C2 noun /wɛlt/

welt

Meaning
A raised mark on the skin, usually from a blow or allergic reaction.
Example
He had a red welt on his arm after the bee sting.
C2 adjective /ˈoʊ.kən/

oaken

Meaning
made of or resembling oak wood
Example
The villagers gathered around the oaken table in the hall.
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 verb /ɛmˈbleɪzən/

emblazon

Meaning
To decorate or display something in a noticeable or impressive way.
Example
The team's logo was emblazoned on their uniforms.
C2 noun /ˈkloʊðiər/

clothier

Meaning
a person or company that makes, sells, or deals in clothes.
Example
The town’s clothier displayed fine suits in his shop window.
C2 noun /ˈbɪvuˌæk/

bivouac

Meaning
a temporary camp without tents or cover, usually used by soldiers or mountaineers
Example
The climbers set up a bivouac on the mountainside.
C2 noun /ˌlɛksɪˈkɒɡrəfər/

lexicographer

Meaning
A person who compiles, writes, or edits dictionaries.
Example
The lexicographer spent years compiling the dictionary.
C2 adjective /ɪnˈdɛkərəs/

indecorous

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

fusible

Meaning
Capable of being melted or fused.
Example
The engineer used a fusible alloy in the experiment.
C2 adjective /ˈfluːviəl/

fluvial

Meaning
relating to or found in a river
Example
The fluvial deposits indicated the presence of an ancient river system.
C2 noun /ˈɑːrbərɪˌkʌltʃər/

arboriculture

Meaning
the cultivation and management of trees and shrubs
Example
He studied arboriculture to improve urban green spaces.
C2 adjective /ɑːrˈbɔːr.i.əl/

arboreal

Meaning
Relating to trees or living in trees; tree-dwelling.
Example
Monkeys are arboreal animals that spend most of their time in trees.
C2 noun /ˈsɪɡnət/

cygnet

Meaning
a young swan
Example
The cygnet swam closely behind its mother.
C2 noun /ɪɡˈzɛmplɑːr/

exemplar

Meaning
A model or pattern to be copied or imitated.
Example
She is an exemplar of kindness and generosity.
C2 verb /ɪnˈskɒns/

ensconce

Meaning
to settle comfortably or securely in a place; to hide or shelter firmly
Example
She ensconced herself in a cozy armchair by the fireplace.
C2 noun /ˈɡeɪm.stər/

gamester

Meaning
A person who plays games, especially one who plays them skillfully or professionally.
Example
The old tavern was filled with gamesters competing in cards and dice.
C2 noun /dʒuːt/

jute

Meaning
a long, soft, shiny plant fiber used to make rope, bags, sacks, and coarse cloth
Example
Jute is widely used to make eco-friendly bags and ropes.
C2 adjective /ʌpˈrɔːr.i.əs/

uproarious

Meaning
Extremely funny or noisy; causing loud laughter or commotion.
Example
The comedian's jokes were absolutely uproarious.
C2 noun /ɪˈfʌldʒəns/

effulgence

Meaning
Brilliant radiance or shining brightness.
Example
The effulgence of the sunrise lit up the entire valley.
C2 noun /ˈtraɪdənt/

trident

Meaning
A three-pronged spear, often associated with Neptune or Poseidon.
Example
The statue of Poseidon holds a mighty trident.
C2 verb /rɛtʃ/

retch

Meaning
to make the sound and movement of vomiting without bringing anything up
Example
The smell of spoiled food made him retch violently.
C2 adjective /ˈsʌpliənt/

suppliant

Meaning
Humbly or earnestly asking for something, especially from a person in authority.
Example
The suppliant man begged for mercy at the king's feet.
C2 adjective /ˌdeɪ.kɒlˈteɪ/

decollete

Meaning
of a woman's dress or top, cut low so as to reveal the neck and upper chest
Example
She wore a decollete gown to the party.
C2 verb /ˈæntɪdeɪtɪd/

antedated

Meaning
assigned to an earlier date than the actual one; happened earlier
Example
The letter was antedated to appear more official.
C2 noun /ˌræproʊʃˈmɑːn/

rapprochement

Meaning
The establishment or resumption of harmonious relations.
Example
The two countries signed an agreement that marked a new rapprochement.
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 noun /ˌser.əˈbreɪ.ʃən/

cerebration

Meaning
the process of thinking or using the brain actively
Example
The lecture sparked intense cerebration among the students.
C2 noun /ˈmɪsəleɪni/

miscellany

Meaning
A collection or mixture of various things.
Example
The book is a miscellany of essays and poems.
C2 noun /meɪˈlɑːnʒ/

melange

Meaning
A mixture of different things or styles.
Example
The festival offered a melange of music, food, and art.
C2 verb /blæsˈfiːm/

blaspheme

Meaning
to speak irreverently about God or sacred things
Example
He was accused of blaspheming during the heated argument.
C2 noun mɒnəˈtɑːskɪŋ

monotasking

Meaning
The practice of dedicating oneself to a given task and minimizing potential interruptions until the task is completed or a significant period of time has elapsed.
Example
Monotasking can often lead to higher quality work.
C2 adjective /ˈmæk.jʊˌleɪ.tɪd/

maculated

Meaning
Spotted or stained; marked with blemishes.
Example
The maculated surface of the old mirror gave it a unique charm.
C2 verb /ˌɪn.trəˈmɪt/

intromit

Meaning
To insert or introduce something into a place or body.
Example
The doctor carefully intromitted the instrument into the wound.
C2 adjective /ˌnɒndɪˈskrɪpt/

nondescript

Meaning
Lacking distinctive or interesting features; dull and unremarkable.
Example
He lives in a nondescript apartment building on the edge of town.
C2 verb /ˈɒsɪfaɪ/

ossify

Meaning
to turn into bone or become rigid and inflexible
Example
With age, some tissues tend to ossify.
C2 noun /ˈkaʊntɪŋˌhaʊs/

counting-house

Meaning
a business office where accounts are kept and financial transactions are managed
Example
The merchant spent most of his day in the counting-house reviewing ledgers.
C2 verb /ˌaʊtməˈnuːvər/

outmaneuver

Meaning
to gain an advantage over an opponent by skillful or clever action
Example
The smaller company managed to outmaneuver its larger rival.
C2 verb /ˈæbrəɡeɪt/

abrogate

Meaning
To formally repeal, cancel, or abolish a law, agreement, or custom.
Example
The government decided to abrogate the outdated treaty.
C2 adjective /ˈsɒmnələnt/

somnolent

Meaning
Sleepy or drowsy; causing a desire to sleep.
Example
The somnolent lecture made half the class fall asleep.
C2 noun /ˌtrænspəˈzɪʃən/

transposition

Meaning
the act of changing the order or position of something
Example
The transposition of digits caused an error in the calculation.
C2 noun /ʃiːf/

sheaf

Meaning
a bundle of grain stalks laid lengthwise and tied together after reaping; a bundle of objects tied together
Example
The farmer carried a sheaf of wheat on his shoulder.
C2 noun /ˈpæn.θi.ɪ.zəm/

pantheism

Meaning
The belief that God and the universe are identical, or that everything is a manifestation of God.
Example
Spinoza’s philosophy is often associated with pantheism.
C2 noun /əˈblɪkwɪti/

obliquity

Meaning
Deviation from moral or usual conduct; indirectness or lack of straightforwardness.
Example
The politician was criticized for the obliquity of his answers.
C2 noun /ˌluː.mɪˈnɛs.əns/

luminescence

Meaning
The emission of light by a substance not resulting from heat; a type of cold light.
Example
The luminescence of the fireflies lit up the forest.
C2 verb /ˈkɒdʒɪteɪt/

cogitate

Meaning
to think deeply about something; to meditate or reflect
Example
He sat by the river to cogitate on his future plans.