aeronaut
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C2 noun /ˈɛərəˌnɔːt/

aeronaut

Meaning
A person who travels in an airship, balloon, or other aircraft.
Example
The aeronaut skillfully guided the hot-air balloon across the valley.
C2 adjective /ˌɪɡ.nəˈmɪn.i.əs/

ignominious

Meaning
Marked by shame, disgrace, or humiliation.
Example
The team suffered an ignominious defeat in the finals.
C2 noun /ɪmˈprɑːvɪdəns/

improvidence

Meaning
Lack of foresight or care for future needs.
Example
His improvidence led to financial difficulties.
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 noun /ˌbædɪˈnɑːʒ/

badinage

Meaning
Playful and humorous conversation; banter.
Example
The friends enjoyed a light badinage over coffee.
C2 noun /ˈmaɪtər/

miter

Meaning
a tall, pointed hat worn by bishops; also a type of joint made between two pieces of material
Example
The bishop placed the miter on his head during the ceremony.
C2 noun /ˌspoʊliˈeɪʃən/

spoliation

Meaning
The act of destroying or ruining something, often evidence or property.
Example
The court punished the company for the spoliation of evidence.
C2 noun /maɪˈkrɑː.skə.pi/

microscopy

Meaning
The use of a microscope to observe small objects or organisms.
Example
Microscopy revealed the structure of the cells.
C2 noun /ˌdaɪ.jʊˈret.ɪk/

diuretic

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

gesticulation

Meaning
a gesture, especially a dramatic one, used instead of speaking or to emphasize speech
Example
His speech was full of passionate gesticulations.
C2 verb /ɪnˈdʒɛst/

ingest

Meaning
To take food, drink, or another substance into the body, usually by swallowing.
Example
The patient must ingest the medicine with water.
C2 adjective /ˌɛvɪˈdɛnʃəl/

evidential

Meaning
relating to or providing evidence
Example
The lawyer presented evidential support for her claims.
C2 noun /ˌkɑːrt ˈblɑːnʃ/

carte blanche

Meaning
complete freedom to act as one wishes
Example
The manager gave her team carte blanche to design the project.
C2 noun /ˌænɪˈmɒmɪtər/

anemometer

Meaning
An instrument used to measure the speed and direction of wind.
Example
The scientist used an anemometer to record the wind speed during the storm.
C2 adjective /ˈseɪpiənt/

sapient

Meaning
Wise, or appearing to be wise.
Example
The professor gave a sapient response to the complex question.
C2 adjective /ˈfɒksi/

foxy

Meaning
Clever, cunning, or attractive.
Example
He came up with a foxy plan to win the game.
C2 noun /ˌkɔːrnjuˈkoʊpiə/

cornucopia

Meaning
an abundance or overflowing supply of something
Example
The festival offered a cornucopia of fruits and sweets.
C2 verb /ɪˈfjuːz/

effuse

Meaning
To pour out or express feelings freely and openly.
Example
She effused gratitude for the help she received.
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 adjective /rɪˈzɪstləs/

resistless

Meaning
Impossible to resist; having an overpowering effect.
Example
She felt a resistless urge to laugh at the joke.
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 adjective /ˌæk.rɪˈmoʊ.ni.əs/

acrimonious

Meaning
Bitter and angry, often involving harsh words.
Example
The debate turned acrimonious after the controversial remark.
C2 verb /ˈdɒdə/

dodder

Meaning
To move in a weak and unsteady way, especially due to old age.
Example
The old man doddered across the street with a cane.
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 adverb /ˈbruːskli/ or /ˈbrʌskli/

brusquely

Meaning
in a blunt, abrupt, or rude manner
Example
She brusquely dismissed the suggestion.
C2 noun /ˈdəʊ.lər/

dolor

Meaning
A state of great sorrow or distress.
Example
The nation was in deep dolor after the tragedy.
C2 noun (plural, informal) /skædz/

scads

Meaning
A large number or quantity of something (informal).
Example
She has scads of friends in the city.
C2 verb /ˈɪməleɪt/

immolate

Meaning
To kill or sacrifice, especially by burning.
Example
The protesters threatened to immolate themselves in front of the building.
C2 adjective /ˈkɒs.ɪ.tɪd/

cosseted

Meaning
pampered, treated with excessive care and attention
Example
The cosseted child always got what he wanted.
C2 noun /ˈsɜːrklət/

circlet

Meaning
A small circular band, typically worn as an ornament on the head.
Example
The princess wore a golden circlet on her forehead.
C2 verb /əˈbɑː.mə.neɪt/

abominate

Meaning
to feel hatred or loathing for something
Example
She abominates cruelty to animals.
C2 noun /djuːˈplɪsɪti/

duplicity

Meaning
Deceitfulness or double-dealing; dishonesty.
Example
Her duplicity was revealed during the investigation.
C2 noun /ˈspɒt.ɪd sneɪk hed/

Spotted snake head

Meaning
a type of freshwater fish with spotted markings and an elongated head resembling a snake
Example
The spotted snake head is a popular fish for aquaculture in South Asia.
C2 noun /əbˈdʌktər/

abductor

Meaning
a person who kidnaps or forcibly takes someone away
Example
The police arrested the abductor after a nationwide search.
C2 adjective /ˈdjuːtiəbl/

dutiable

Meaning
subject to customs duty or tax
Example
Imported electronics are often dutiable at the border.
C2 adjective /dɪˈluːsəri/

delusory

Meaning
Based on illusion; not real.
Example
He was filled with delusory hopes of becoming famous overnight.
C2 verb /əˈɡlɒməˌreɪt/

agglomerate

Meaning
To collect or form into a mass or group.
Example
The dust particles began to agglomerate into larger clusters.
C2 noun/verb /ˈkætˌkɔːl/

catcall

Meaning
A loud whistle or shout of disapproval or sexual harassment directed at someone.
Example
The actress ignored the catcalls from the crowd.
C2 adjective ɪnˈdɒm.ɪ.tə.bəl

indomitable

Meaning
Impossible to subdue or defeat.
Example
Her indomitable spirit helped her overcome adversity.
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 /ˈnɪk.næk/

knickknack

Meaning
A small decorative object, especially in a house.
Example
The shelf was full of little knickknacks collected from their travels.
C2 adjective /ˈsɪbɪlənt/

sibilant

Meaning
Making or characterized by a hissing sound.
Example
The word 'snake' starts with a sibilant sound.
C2 adjective /ˈmɔːrɪbʌnd/

Moribund

Meaning
near death; dying; in a state of decline or decay
Example
The moribund patient was in critical condition.
C2 verb /ˈdiːɪfaɪ/

deify

Meaning
to treat or worship someone or something as a god
Example
Some fans deify their favorite celebrities.
C2 adjective /ˌɛkstrəˌdʒuːˈdɪʃəl/

extrajudicial

Meaning
done outside the authority of the legal system or judicial process
Example
The activists condemned the extrajudicial killings.
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 noun /səbˈmɜːrʒən/

submersion

Meaning
the state of being under water
Example
The submersion of the fields lasted for several days after the heavy rain.
C2 verb /dɪsˈbɜːrs/

disburse

Meaning
to pay out money, especially from a fund
Example
The organization will disburse the funds to the affected families.
C2 adjective /ˌjuːləˈdʒɪstɪk/

eulogistic

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

tutelary

Meaning
Relating to or serving as a guardian or protector, often used for deities or spirits.
Example
Athena was considered the tutelary goddess of Athens.
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 /ˌpliːnɪpəˈtɛnʃəri/

plenipotentiary

Meaning
a person invested with full power to act on behalf of another, especially in diplomacy
Example
The ambassador was a plenipotentiary sent to negotiate the treaty.
C2 noun /əbˈhɒrəns/

abhorrence

Meaning
a feeling of strong disgust or hatred
Example
He expressed his abhorrence of racial discrimination.
C2 adjective /ˈmɔːkɪʃ/

mawkish

Meaning
excessively sentimental, often to the point of being sickly
Example
The movie was criticized for its mawkish sentimentality.
C2 noun /liː/

lea

Meaning
An open area of grassy or arable land; a meadow.
Example
The cottage was surrounded by a quiet lea.
C2 noun /ˈjuːər/

ewer

Meaning
a large jug with a wide mouth, especially used in the past for carrying water
Example
The servant filled the ewer with fresh water.
C2 noun /ˌkiː.təʊˈdʒen.ɪ.sɪs/

ketogenesis

Meaning
The metabolic process by which the liver produces ketones from fatty acids, providing an alternative energy source during low carbohydrate availability.
Example
Ketogenesis occurs during fasting or low-carb diets.
C2 adjective /ˌser.ɪˈməʊ.ni.əs/

ceremonious

Meaning
marked by formality, politeness, or strict observance of customs
Example
He gave her a ceremonious bow before entering the hall.
C2 noun /ˈɛksplɪkeɪtər/

explicator

Meaning
a person who explains or interprets something in detail
Example
The critic served as an explicator of the poet’s complex works.
C2 noun /ˈrɛk.tɪ.tjuːd/

rectitude

Meaning
Morally correct behavior or thinking; righteousness and integrity.
Example
His rectitude earned him respect in society.
C2 noun /ˈʌŋkʃən/

unction

Meaning
The act of anointing as part of a religious or ceremonial ritual; excessive or insincere flattery.
Example
The priest performed the holy unction with solemnity.
C2 noun /ˌmɒnəˈmeɪniə/

monomania

Meaning
Excessive concentration or obsession with a single subject or idea.
Example
His monomania for collecting stamps worried his family.
C2 noun /ˈbærəˌɡræf/

barograph

Meaning
an instrument that records changes in atmospheric pressure
Example
The scientist checked the barograph for pressure variations.
C2 noun /neɪv/

Knave

Meaning
a dishonest person, especially a man; a playing card with a picture of a male servant
Example
The knave tried to cheat the old woman out of her savings.
C2 noun /ˈʃɑːrlətən/

charlatan

Meaning
a person who pretends to have knowledge or skills that they do not really possess; a fraud
Example
The so-called healer was exposed as a charlatan.
C2 noun /ˈhelmz.mən/

Helmsman

Meaning
a person who steers a ship or boat; the person at the helm of a vessel
Example
The experienced helmsman skillfully guided the yacht through the narrow channel during the storm.
C2 noun /ˌriːkəˌpɪtjʊˈleɪʃən/

recapitulation

Meaning
The act of summarizing or repeating the main points of something.
Example
The professor gave a brief recapitulation of the lecture before ending the class.
C2 noun /ˈɡɔːntlɪt/

gauntlet

Meaning
a protective glove; a challenge or trial; to 'throw down the gauntlet' means to issue a challenge
Example
The knight threw down his gauntlet as a sign of challenge.
C2 adjective /ləˈsɪviəs/

lascivious

Meaning
showing an overt and often offensive sexual desire
Example
The lascivious remarks made everyone uncomfortable.
C2 verb /ˌmɪs.əˈtrɪb.juːt/

misattribute

Meaning
to incorrectly credit something, such as a work or remark, to the wrong person or source
Example
The quote was misattributed to Shakespeare.
C2 noun /fækˈtoʊtəm/

factotum

Meaning
an employee who does many different types of work; a general servant
Example
He worked as a factotum, handling both clerical and maintenance duties.
C2 noun /ˌiː.mɛnˈdeɪ.ʃən/

emendation

Meaning
a correction or improvement made to a text
Example
The article required several emendations before it was ready for print.
C2 noun /ɪˈlɪziəm/

elysium

Meaning
A place or state of perfect happiness; in Greek mythology, the afterlife paradise.
Example
For her, the garden was a personal elysium.
C2 noun /ˈdæl.i.əns/

Dalliance

Meaning
a casual romantic or sexual relationship; a brief involvement or experiment
Example
His dalliance with photography lasted only a few months before he lost interest.
C2 noun/verb /ˈkʌdʒ.əl/

cudgel

Meaning
A short, thick stick used as a weapon; to beat with a cudgel.
Example
The guard used a cudgel to chase away the thief.
C2 noun /ˈiːɡlət/

eaglet

Meaning
A young eagle.
Example
The eaglet waited in the nest for its mother to return.
C2 noun /rɪˈpæst/

repast

Meaning
A meal or the food eaten during a meal.
Example
They enjoyed a delicious repast by the riverside.
C2 verb /ˈtʃɔːrtl/

chortle

Meaning
to laugh in a breathy, gleeful way
Example
The audience chortled at the comedian's witty remarks.
C2 adjective /əˈbɪs.əl/

abyssal

Meaning
Related to or characteristic of the deep ocean, especially the zone below 4000 meters.
Example
Abyssal creatures survive in extreme pressure conditions.
C2 verb /ˈrʌstɪkeɪt/

rusticate

Meaning
To go to the countryside or to suspend someone from university.
Example
He decided to rusticate in the village to escape the busy city life.
C2 adjective /ˌhɑːrdˈbɪtn̩/

hard-bitten

Meaning
tough and experienced, not easily affected by emotions or hardship
Example
The hard-bitten detective showed no sign of surprise at the crime scene.
C2 adjective /əˈstrɪndʒənt/

astringent

Meaning
sharp or severe in manner or style; also describes a substance that contracts skin or body tissues
Example
Her astringent tone silenced the noisy class.
C2 noun /ˈæktʃuˌɛri/

actuary

Meaning
A professional who analyzes financial risk using mathematics, statistics, and financial theory, especially in insurance and pensions.
Example
The actuary calculated the risk before finalizing the insurance policy.
C2 adjective /ɪnhɑːrˈmoʊniəs/

Inharmonious

Meaning
lacking harmony; discordant in sound; not in tune
Example
The inharmonious sounds from the broken piano made everyone cover their ears.
C2 noun /əˈrɪə/

arrear

Meaning
A debt or payment that is overdue and unpaid.
Example
He was sued for an arrear of rent.
C2 noun /ˈtjuːtərʃɪp/

tutorship

Meaning
The office or position of a tutor; guidance or instruction given by a tutor.
Example
He thrived under the tutorship of his mentor.
C2 adjective /ɪˈfjuːsɪv/

effusive

Meaning
Expressing feelings of gratitude, pleasure, or approval in an unrestrained or heartfelt manner.
Example
She gave him an effusive welcome after his long journey.
C2 verb /ˈek.stər.peɪt/

extirpate

Meaning
to completely remove or destroy something unwanted
Example
The government launched a program to extirpate corruption from public offices.
C2 noun /ˈækəlaɪt/

acolyte

Meaning
a follower or assistant, especially in a religious service or as a devoted supporter of a leader
Example
The senator arrived with a small group of acolytes who handled the press.
C2 noun /ˈsɪniæst/

cineast

Meaning
A film enthusiast or filmmaker; a person deeply interested in cinema.
Example
As a true cineast, she spends most weekends watching classic films.
C2 noun /ɪˌledʒ.əˈbɪl.ə.ti/

Illegibility

Meaning
the quality of being impossible or difficult to read; unclear writing or print
Example
The doctor's handwriting was famous for its illegibility among the pharmacy staff.
C2 adjective /ˈiːkwaɪn/

equine

Meaning
Relating to or resembling a horse.
Example
The veterinarian specialized in equine medicine.
C2 adjective /ˈvoʊlənt/

volant

Meaning
able to fly or moving swiftly
Example
The volant bird soared gracefully across the sky.
C2 verb /ˌɪntərˈmɪt/

intermit

Meaning
To suspend or stop for a time; to pause intermittently.
Example
The rain would intermit and then start again.
C2 adjective /ˈtɜːrdʒɪd/

turgid

Meaning
Swollen or distended; (of language) pompous and overcomplicated.
Example
The professor’s lecture was so turgid that many students lost interest.
C2 noun dɪsˈbɜːs.mənt

disbursement

Meaning
The payment of money from a fund.
Example
The company's disbursement of salaries was delayed.
C2 adjective /ˈræfɪʃ/

raffish

Meaning
unconventional and slightly disreputable but attractive
Example
He had a raffish charm that made him popular in the city.
C2 noun /ˈpɜːrtnəs/

pertness

Meaning
boldness or forwardness in speech or behavior; sauciness
Example
Her pertness during the meeting surprised everyone.
C2 verb /həˈmɑː.dʒə.naɪz/

homogenize

Meaning
To make uniform or similar by blending or mixing different elements.
Example
The company tried to homogenize its products across global markets.
C2 adjective /ˌɪntərˈlɒkjətəri/

interlocutory

Meaning
Given during the course of a legal action, not final but temporary or provisional.
Example
The judge issued an interlocutory order to maintain the status quo until the hearing.
C2 adjective /ˈmiːliˌmaʊðd/

mealymouthed

Meaning
not willing to speak directly and honestly; evasive in speech
Example
The politician gave a mealymouthed response to the tough question.
C2 verb /dʌn/

dun

Meaning
to demand payment of a debt persistently
Example
The landlord dunned the tenant for unpaid rent.
C2 verb /dɪˈsɛvər/

dissever

Meaning
To separate or cut apart.
Example
The treaty sought to dissever the two hostile regions.
C2 noun /ˈbɔːlsəm/

Balsam

Meaning
a flowering plant with colorful blooms that often open in the evening; also refers to aromatic resin
Example
The garden balsam flowers bloomed beautifully in various shades of pink and purple.
C2 adjective /ɪˈrɛfrəɡəbəl/

irrefragable

Meaning
Impossible to refute, deny, or break
Example
The lawyer presented irrefragable evidence that proved his client’s innocence.
C2 adjective /ˌæntɪˈmʌndeɪn/

antemundane

Meaning
Existing or occurring before the creation of the world.
Example
Some myths speak of an antemundane chaos before order was established.
C2 noun /ˈmʌɡwʌmp/

mugwump

Meaning
a person who remains independent from party politics or remains aloof from disputes
Example
He was called a mugwump for refusing to join either political side.
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 noun /ˈhjuːməs/

humus

Meaning
The dark, organic material in soil formed from decayed plants and animals.
Example
The gardener enriched the soil with humus to improve plant growth.
C2 verb /ˈprɒsəˌlaɪtaɪz/

proselytize

Meaning
To try to persuade someone to convert to a different belief or religion.
Example
They tried to proselytize the villagers with their new ideas.
C2 verb /kɒnˈkætəneɪt/

concatenate

Meaning
To link things together in a series or chain.
Example
The program concatenates two strings into one.
C2 noun /ˈæmɪti/

amity

Meaning
A friendly relationship between people or countries.
Example
The treaty helped maintain amity between the neighboring nations.
C2 noun /ˈjuːzjuːfrʌkt/

usufruct

Meaning
The legal right to use and enjoy the benefits of someone else’s property without owning it.
Example
The tenant had the usufruct of the land but not its ownership.
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 /ˌsaɪ.kəʊˈɡræf.ɪks/

Psychographics

Meaning
The study and classification of people according to their attitudes, aspirations, and other psychological criteria.
Example
Psychographics reveal consumer buying motives.
C2 noun /ˌmɑːrtəˈnɛt/

martinet

Meaning
A strict disciplinarian who demands rigid adherence to rules.
Example
The new manager was such a martinet that even minor infractions were punished.
C2 adjective /ˌdaɪəˈtɒmɪk/

diatomic

Meaning
Consisting of two atoms.
Example
Oxygen is a diatomic molecule.
C2 verb /æbˈdʒʊər/

abjure

Meaning
to formally renounce or give up a belief, cause, or claim
Example
He abjured his allegiance to the old regime.
C2 verb /ˈbætn/

batten

Meaning
To fasten or secure something tightly.
Example
They battened down the hatches before the storm.
C2 noun /ˈænɪməs/

animus

Meaning
A strong feeling of hostility; motivation or purpose behind an action.
Example
His speech was driven by animus against the policy.
C2 verb /ˌdɪsɪnˈhɛrɪt/

disinherit

Meaning
to deprive someone, especially a child, of inheritance or right to property
Example
The father threatened to disinherit his son for his reckless actions.