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C2 verb /ˌæd ˈlɪb/

ad-lib

Meaning
to speak or perform without preparation; to improvise
Example
The comedian ad-libbed a joke when the microphone failed.
C2 noun /əˈspær.ə.ɡəs biːn/

Asparagus bean

Meaning
a long, thin green vegetable pod that grows on vines; also known as yard-long bean
Example
The asparagus bean grows up to three feet long and is commonly used in Asian cooking.
C2 verb /əˈdjuːs/

adduce

Meaning
To provide evidence or reasons to support an argument or idea.
Example
The lawyer adduced several examples to support his case.
C2 noun /əˈkjuːtnəs/

acuteness

Meaning
sharpness of mind or senses; severity or intensity of a condition
Example
Her acuteness allowed her to notice details others missed.
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 /əˈpɜːrtənəns/

appurtenance

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

anthropomorphic

Meaning
attributing human characteristics to non-human things, like animals or objects
Example
The cartoon shows an anthropomorphic cat walking on two legs.
C2 noun /ˈæmjʊlət/

Amulet

Meaning
an ornament or small piece of jewelry thought to give protection against evil, danger, or disease
Example
She wore a silver amulet around her neck for good luck.
C2 noun/adjective /ˈæl.əˌbæs.tər/

alabaster

Meaning
A fine-grained, usually white variety of gypsum, often used for carving; also describes something smooth and pale like alabaster.
Example
The statue was carved from pure alabaster.
C2 noun /ˌæfɛkˈteɪʃən/

affectation

Meaning
an unnatural behavior or speech intended to impress others
Example
Her British accent was just an affectation to sound sophisticated.
C2 adjective /əˈmɔːrfəs/

amorphous

Meaning
Lacking a clear shape or form; without a defined structure.
Example
The plan remained amorphous and lacked concrete details.
C2 adjective /əˈbɑː.mə.nə.bəl/

abominable

Meaning
causing moral revulsion; extremely unpleasant
Example
The prisoners were kept in abominable conditions.
C2 adjective, adverb /əˈbʌvˌbɔːrd/

aboveboard

Meaning
Open and honest; without deception or trickery.
Example
The business deal was completely aboveboard.
C2 adjective /ˈædɪˌpoʊs/

adipose

Meaning
Relating to or consisting of animal fat; fatty.
Example
The doctor explained that the tissue was mainly adipose in nature.
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 adjective /əˈkɪliən/

achillean

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

apoplexy

Meaning
A sudden loss of consciousness or control due to stroke or extreme anger.
Example
The old man nearly had apoplexy when he heard the shocking news.
C2 adjective /ˈæʒər/

azure

Meaning
A bright blue color like that of a clear sky.
Example
The clear sky was painted in a deep shade of azure.
C2 adjective /ˈæprəbəˌtɔːri/

approbatory

Meaning
expressing approval or praise
Example
The teacher gave an approbatory nod after reading the essay.
C2 verb /əˈlɪtəreɪt/

alliterate

Meaning
to repeat the same consonant sound at the beginning of words in a phrase or sentence
Example
The poet often alliterates words to create rhythm.
C2 adverb /əˈmʌk/

amok

Meaning
Behaving uncontrollably and disruptively.
Example
The angry mob ran amok after the verdict was announced.
C2 verb /əˈvɜːr/

aver

Meaning
to state or assert something confidently and strongly
Example
She averred that she was innocent.
C2 noun ˈɔː.tɑː.ki

autarky

Meaning
Economic independence or self-sufficiency; a policy of establishing a self-sufficient national economy.
Example
Some nations aim for autarky to reduce reliance on imports.
C2 noun /əˈsɜːrbəti/

acerbity

Meaning
bitterness or sharpness of tone, manner, or taste
Example
The acerbity of his remarks left everyone silent.
C2 verb /ˈæktʃueɪt/

actuate

Meaning
to put into action or motion; to motivate or activate
Example
The engineer actuated the machine with a simple switch.
C2 noun /ˌæprəˈbeɪʃən/

approbation

Meaning
approval or praise
Example
The plan won the approbation of the board members.
C2 verb /əˈniːl/

anneal

Meaning
To heat and cool metal or glass to make it stronger or less brittle.
Example
The blacksmith annealed the steel to improve its durability.
C2 verb /ˌænɪmədˈvɜːt/

animadvert

Meaning
To comment critically or unfavorably.
Example
The teacher animadverted on the student's careless mistakes.
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 /ˈænti/

ante

Meaning
a stake put up by a player in poker or similar games before receiving cards; also used figuratively to mean an initial investment or contribution
Example
Each player placed an ante before the game began.
C2 adjective /ˈæfəbəl/

affable

Meaning
friendly, easy to talk to, and pleasant in manner
Example
He is such an affable host that everyone feels comfortable at his parties.
C2 noun /ˈæmpərˌsænd/

ampersand

Meaning
The symbol '&' used to represent the word 'and'.
Example
Use an ampersand instead of writing the word 'and' in the company name.
C2 adverb /əˈbæk/

Aback

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

auricular

Meaning
Relating to the ear or hearing.
Example
The doctor used an auricular thermometer to check the patient's temperature.
C2 noun /ˌænθrəpəˈsɛntrɪzəm/

anthropocentrism

Meaning
The belief that human beings are the most important or central element of existence.
Example
Anthropocentrism often shapes environmental policies.
C2 noun /əˈkwɪtəns/

acquittance

Meaning
a written receipt acknowledging payment or discharge of a debt
Example
He demanded an acquittance after paying the loan.
C2 noun /ˌætəlˈjeɪ/

atelier

Meaning
A workshop or studio, especially for an artist or designer.
Example
The painter invited us to his atelier to view his new collection.
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 /əˈkriːt/

accrete

Meaning
to grow or increase gradually by accumulation or addition
Example
Dust particles accrete over time to form larger celestial bodies.
C2 noun /ænˈtɪlədʒi/

antilogy

Meaning
A contradiction in terms or ideas; inconsistency in speech or writing.
Example
The politician's statement was criticized for its antilogy.
C2 noun /əˈpɒθəˌkɛri/

apothecary

Meaning
A historical term for a person who prepared and sold medicines and drugs.
Example
The village apothecary provided remedies for many common illnesses.
C2 noun /ˌeɪd də ˈkæmp/

aide-de-camp

Meaning
A military officer acting as a confidential assistant to a senior officer.
Example
The general was accompanied by his aide-de-camp during the ceremony.
C2 noun /ˈɑːm.lət/

Armlet

Meaning
a band worn around the upper arm as an ornament
Example
The traditional dancer wore golden armlets that gleamed in the spotlight.
C2 noun /əˈrɔɪ.oʊ/

arroyo

Meaning
A dry creek or stream bed that temporarily fills with water after heavy rain.
Example
After the storm, the arroyo quickly filled with rushing water.
C2 noun /ˈæntiruːm/

anteroom

Meaning
A small room leading to a main one, often used as a waiting area.
Example
The guests waited in the anteroom before being called inside.
C2 noun /ˈɑːrkeɪˌɪzəm/

archaism

Meaning
a word, expression, or style of language that is no longer in everyday use
Example
The poem is full of archaisms that give it an old-fashioned flavor.
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 adjective /ˌæk.rɪˈmoʊ.ni.əs/

acrimonious

Meaning
Bitter and angry, often involving harsh words.
Example
The debate turned acrimonious after the controversial remark.
C2 noun /əˌbɑː.məˈneɪ.ʃən/

abomination

Meaning
a thing that causes disgust or hatred
Example
Slavery was considered an abomination.
C2 verb əˈmiːljəreɪt

ameliorate

Meaning
To make better; improve or enhance something.
Example
The new policies are designed to ameliorate living conditions.
C2 noun /əˈstɪɡmətɪzəm/

astigmatism

Meaning
An eye defect causing blurred vision due to irregular curvature of the cornea or lens.
Example
She wears glasses to correct her astigmatism.
C2 verb /əˈfaɪəns/

affiance

Meaning
to promise or pledge marriage; to formally engage
Example
They decided to affiance after years of friendship.
C2 verb /ˈærəˌɡeɪt/

arrogate

Meaning
To claim or take something without justification.
Example
The dictator arrogated all powers to himself.
C2 adjective /ɑːrˈθʊr.i.ən/

arthurian

Meaning
Relating to the legendary King Arthur and the stories surrounding him.
Example
The novel is set in an Arthurian world of knights and castles.
C2 noun /ˈæsɪˌteɪt/

acetate

Meaning
a salt or ester of acetic acid; a synthetic material used in textiles and film
Example
The company produces acetate fibers for clothing.
C2 noun /ˈɔːlmənæk/

almanac

Meaning
An annual publication containing calendars, weather forecasts, astronomical data, and other useful information.
Example
He consulted the almanac to check the phases of the moon.
C2 noun /əˈfleɪtəs/

afflatus

Meaning
a sudden divine inspiration or creative impulse
Example
The poet wrote the verses under a sudden afflatus of inspiration.
C2 noun /æmˈbroʊʒə/

ambrosia

Meaning
The food of the gods in classical mythology; something extremely pleasing to taste or smell.
Example
The dessert was so delicious that it tasted like ambrosia.
C2 verb /ˈæbnɪˌɡeɪt/

abnegate

Meaning
to deny or renounce something, especially a right or desire
Example
She chose to abnegate her personal interests for the sake of the team.
C2 adjective /ˌæktʃuˈɛəriəl/

actuarial

Meaning
Relating to actuaries or their work of analyzing financial risk and uncertainty, especially in insurance and pensions.
Example
The company relied on actuarial reports to set insurance premiums.
C2 noun /ˈɑːrtləsnəs/

artlessness

Meaning
The quality of being natural and simple without deceit or pretension.
Example
Her artlessness made her beloved by all.
C2 noun /ˈæl.ɪ.mənt/

aliment

Meaning
food or nourishment that sustains life
Example
Fruits and vegetables are important aliments for a healthy body.
C2 noun /əˈvɪdəti/

avidity

Meaning
extreme eagerness or enthusiasm
Example
He accepted the offer with avidity.
C2 noun /ænˈtɪpəθi/

antipathy

Meaning
a deep-seated feeling of dislike or aversion toward something or someone
Example
There was a mutual antipathy between the two rival companies.
C2 verb /əˈbeɪs/

abase

Meaning
to belittle or degrade someone
Example
He refused to abase himself before the king.
C2 adjective əˈdrɔɪt

adroit

Meaning
clever or skillful in using the hands or mind.
Example
She is adroit at solving complex problems.
C2 noun /ɔːl/

awl

Meaning
a small pointed tool used for making holes, especially in leather
Example
The cobbler used an awl to punch holes in the leather.
C2 noun /ænˈtɪfəni/

antiphony

Meaning
a form of music in which two or more groups or choirs sing alternately in response to each other
Example
The cathedral's architecture was designed to enhance the effect of antiphony.
C2 noun /ˈætəmaɪzər/

atomizer

Meaning
A device that sprays liquid into a fine mist.
Example
She used an atomizer to apply the perfume evenly.
C2 noun əˈdrɔɪt.nəs

adroitness

Meaning
Cleverness or skill, especially in using the hands or mind; skillful dexterity.
Example
His adroitness in negotiations secured the deal.
C2 noun /əˈkwaɪərmənt/

acquirement

Meaning
the act of acquiring something; something that has been acquired, especially a skill or possession
Example
Language proficiency is an important acquirement for global careers.
C2 noun /ˈɑːr.bɪ.trɑːʒ/

arbitrage

Meaning
The simultaneous buying and selling of securities in different markets to take advantage of differing prices.
Example
Investors use arbitrage to make profits in global markets.
C2 noun /ˌæpəˈzɪʃən/

apposition

Meaning
a grammatical construction in which two elements are placed side by side, with one explaining the other
Example
In the phrase 'my friend John,' the word 'John' is in apposition to 'my friend.'
C2 noun /əˈnæθəmə/

anathema

Meaning
something or someone intensely disliked or strongly condemned
Example
Violence is anathema to her peaceful nature.
C2 noun /ˈæbɪs/

abbess

Meaning
the woman in charge of a convent of nuns
Example
The abbess welcomed the visitors to the convent.
C2 adjective /æmˈbroʊʒiəl/

ambrosial

Meaning
Exceptionally pleasing to taste or smell; divine.
Example
The aroma of freshly baked bread was simply ambrosial.
C2 adjective, adverb /əˈfʊt/

afoot

Meaning
In progress; happening or being prepared.
Example
There are several new projects afoot in the company.
C2 noun /ˌær.əˈbɪl.ɪ.ti/

arability

Meaning
The quality of land being suitable for growing crops.
Example
The arability of land depends on soil quality and water availability.
C2 adjective /eɪˈsɛptɪk/

aseptic

Meaning
Free from contamination caused by harmful microorganisms; sterile.
Example
Surgeons must work in an aseptic environment to prevent infection.
C2 adjective ˌeə.rəʊˈstæt.ɪk

aerostatic

Meaning
Relating to or involving gases (especially air) in equilibrium and the equilibrium of balloons or aircraft under the influence of such gases.
Example
Aerostatic designs ensure stability at high altitudes.
C2 noun /ˌɛərəˈstætɪks/

aerostatics

Meaning
The branch of physics that deals with the equilibrium of air and gases and the forces acting on bodies in them.
Example
Aerostatics is essential for understanding how balloons float.
C2 adjective /ədˈmɒnɪtəri/

admonitory

Meaning
giving or conveying a warning or reprimand
Example
She gave him an admonitory glance.
C2 verb /əbˈhɔːr/

abhor

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

adulterant

Meaning
a substance added to something else, often food or drink, to reduce its quality or strength
Example
The laboratory found an adulterant in the milk samples.
C2 adjective /ˌæntɪˈθɛtɪkəl/

antithetical

Meaning
Directly opposed or contrasted; mutually incompatible.
Example
His views were antithetical to the values of the organization.
C2 noun /æbˈsɪʒən/

abscission

Meaning
The natural detachment of parts of a plant, typically leaves or fruit.
Example
The autumn season is marked by the abscission of leaves from trees.
C2 noun /ˈævərɪs/

avarice

Meaning
extreme greed for wealth or material gain
Example
His avarice led him to exploit his workers.
C2 adjective /ˈærənt/

arrant

Meaning
complete or utter (used negatively, e.g., 'arrant nonsense')
Example
His excuse was arrant nonsense.
C2 noun /əˌpɒθiˈoʊsɪs/

apotheosis

Meaning
The highest point of development; the perfect example of something; the elevation of someone to divine status.
Example
Many see the Renaissance as the apotheosis of art and culture in Europe.
C2 noun /ˈætəvɪzəm/

atavism

Meaning
The recurrence of traits or characteristics from a remote ancestor.
Example
The scientist noted atavism in the child’s physical features.
C2 noun, verb /əˈfrʌnt/

affront

Meaning
An action or remark that causes outrage or offense.
Example
He took her criticism as a personal affront.
C2 noun əˈkjuː.ə.ti

acuity

Meaning
Sharpness or keenness of thought, vision, or hearing.
Example
His intellectual acuity made him a brilliant scientist.
C2 adjective /ˈæsɪnaɪn/

asinine

Meaning
Extremely foolish or stupid.
Example
It was an asinine idea to drive into the storm without checking the weather.
C2 verb /əˈkuːtər/

accouter

Meaning
to equip or outfit, typically with military or ceremonial attire
Example
The soldiers were accoutered in full battle gear.
C2 adjective /æbˈstruːs/

abstruse

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

amuck

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

askance

Meaning
With suspicion, mistrust, or disapproval.
Example
She looked askance at his unusual proposal.
C2 noun /ˌæntiˈsaɪkloʊn/

anticyclone

Meaning
A weather system with high atmospheric pressure at its center, usually bringing calm and clear conditions.
Example
An anticyclone brought sunny weather across the region.
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 /ˌæpəˈplɛktɪk/

apoplectic

Meaning
Extremely angry; furious.
Example
He was apoplectic when he heard about the unfair decision.
C2 noun /əˈdɛndəm/

addendum

Meaning
an additional item or piece of information added at the end of a document or book
Example
The report included an addendum with updated statistics.
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 adjective /əˈbɔːrtɪv/

abortive

Meaning
Failing to produce the intended result; unsuccessful.
Example
Their abortive attempt to climb the mountain ended in retreat.
C2 noun /ˈɔːldər/

alder

Meaning
A type of tree from the birch family that typically grows in wet ground and has simple, serrated leaves.
Example
The alder trees grew thick along the riverbank.
C2 noun /ˈænθrəsaɪt/

anthracite

Meaning
A hard, shiny form of coal that burns with little smoke and a high heat value.
Example
The factory used anthracite as its primary fuel source.
C2 noun /əˈbluːʃən/

ablution

Meaning
the act of washing oneself, often for religious purposes
Example
He performed his morning ablution before the prayer.
C2 verb /ˈæsəneɪt/

assonate

Meaning
To correspond or agree in sound, especially by vowel sounds; to rhyme approximately.
Example
The lines assonate beautifully, giving the song a unique flow.
C2 adjective /ˌæntɪdəˈluːviən/

antediluvian

Meaning
extremely old-fashioned; belonging to the time before the biblical flood
Example
His views on women are positively antediluvian.
C2 adjective /əˈfɔːrsed/

Aforesaid

Meaning
mentioned before; previously stated
Example
The aforesaid conditions must be met before approval.
C2 verb /əˈkɒst/

accost

Meaning
to approach and speak to someone boldly or aggressively
Example
The reporter was accosted by protesters outside the courthouse.
C2 adverb /əˈbɛd/

abed

Meaning
in bed
Example
She stayed abed all day due to illness.
C2 noun /ˈædʒ.ə.tənt/

Adjutant

Meaning
a large water bird with long legs and neck, also known as adjutant stork
Example
The adjutant stork stood motionless in the shallow water.
C2 noun /ˈæp.ɪˌkʌl.tʃər/

apiculture

Meaning
The practice of keeping and raising bees for honey and other products.
Example
Apiculture plays a vital role in agriculture by supporting pollination.
C2 noun /ˌæŋɡləˈfoʊbiə/

anglophobia

Meaning
Dislike or fear of England, English people, or English culture.
Example
The politician was accused of promoting Anglophobia in his speeches.
C2 noun /ˈænɪməlˌkjuːl/

animalcule

Meaning
A microscopic animal, especially a protozoan or other minute organism.
Example
The scientist observed an animalcule moving under the microscope.
C2 adjective /ˈeɪkwiəs/

aqueous

Meaning
related to or containing water; watery
Example
The solution was in an aqueous form.
C2 noun /əˈnæb.ə.lɪ.zəm/

anabolism

Meaning
The set of metabolic pathways that construct molecules from smaller units, involving tissue repair and growth.
Example
Anabolism is essential for muscle growth and tissue repair.
C2 verb /ˌæntɪˈsiːd/

antecede

Meaning
to come before in time or order
Example
A short introduction usually antecedes the main text.
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 noun /ˈeɪʒən swɒmp iːl/

Asian swamp eel

Meaning
a snake-like freshwater fish that can survive in muddy waters and is considered a delicacy in South Asian cuisine
Example
Asian swamp eel can breathe air and survive in shallow muddy waters.