obsidian
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C2 noun /əbˈsɪdiən/

obsidian

Meaning
A hard, dark, glasslike volcanic rock formed by rapid solidification of lava.
Example
The knife was made from sharp obsidian.
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 /ˈɪŋkjʊbəs/

incubus

Meaning
An oppressive or nightmarish burden; in folklore, an evil spirit that lies upon sleeping people.
Example
Debt became an incubus that weighed heavily on the family.
C2 verb /ɪnˈtɜːrpəˌleɪt/

interpolate

Meaning
To insert something, often words, into a text or conversation; to estimate values between known data points.
Example
The editor interpolated a missing paragraph into the manuscript.
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 noun /ˈtæmbər/ or /ˈtɪmbər/

timbre

Meaning
The character or quality of a musical sound or voice as distinct from its pitch and intensity.
Example
Her voice had a warm timbre that soothed the audience.
C2 noun /ˈplɛnɪtjuːd/

plenitude

Meaning
the condition of being full or abundant; a great quantity
Example
The garden was a plenitude of flowers in spring.
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 /ˈfræk.ʃəs/

Fractious

Meaning
irritable and quarrelsome; difficult to control; bad-tempered
Example
The fractious child refused to follow any of the teacher's instructions.
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 noun /ˈkaɪrəˌmænsi/

chiromancy

Meaning
The practice of predicting the future by interpreting the lines on the palms of hands; palmistry.
Example
The old woman practiced chiromancy and told fortunes for travelers.
C2 adjective /ˌɪrɪˈfrændʒɪbəl/

irrefrangible

Meaning
Not to be broken, violated, or infringed
Example
The constitution guarantees certain irrefrangible rights to every citizen.
C2 noun /tɛkˈnɒɡrəfi/

technography

Meaning
the descriptive study or writing about the practical arts, technologies, or technical methods of a society
Example
The anthropologist specialized in technography to understand indigenous tool-making traditions.
C2 verb /ˈflʌməks/

flummox

Meaning
To confuse or bewilder someone completely.
Example
The complicated puzzle flummoxed the students.
C2 noun /ˈluː.nə.si/

lunacy

Meaning
Extreme foolishness or madness; insanity.
Example
It was sheer lunacy to go hiking in the storm.
C2 noun /ˈdʒæk.dɔː/

Jack-daw

Meaning
a small gray and black bird of the crow family, known for its intelligence
Example
The jackdaw collected shiny objects for its nest.
C2 verb /trænsˈfɪɡjʊər/

transfigure

Meaning
To transform the outward appearance or form, often in a way that elevates or glorifies.
Example
The artist managed to transfigure simple clay into a beautiful sculpture.
C2 adjective /ɒmˈnɪp.ə.tənt/

omnipotent

Meaning
Having unlimited power; able to do anything; all-powerful.
Example
In many religions, God is considered omnipotent.
C2 noun /əˈluːviən/

alluvion

Meaning
The gradual increase of land by the deposit of soil from water; also, a flood or overflow of water.
Example
The river’s alluvion added new fertile land to the village fields.
C2 adjective /ɡrɪˈɡɛəriəs/

gregarious

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

aseptic

Meaning
Free from contamination caused by harmful microorganisms; sterile.
Example
Surgeons must work in an aseptic environment to prevent infection.
C2 verb /ˌdɪsəˈbjuːz/

disabuse

Meaning
To free someone from a false belief or misconception.
Example
The teacher tried to disabuse the students of their misunderstanding.
C2 noun /dəˈɡerəˌtaɪp/

daguerreotype

Meaning
An early type of photograph produced on a silver or silver-covered copper plate.
Example
The museum displayed a rare daguerreotype of Abraham Lincoln.
C2 adjective /ɪnˈsɪpiənt/

incipient

Meaning
in an initial stage; beginning to develop
Example
The incipient storm made the sky turn dark and heavy.
C2 noun /ɡreɪˈdeɪʃən/

gradation

Meaning
A gradual change from one stage, tone, or degree to another.
Example
The artist used subtle gradation of colors in her painting.
C2 adjective /ˈmɪnsɪŋ/

mincing

Meaning
affectedly delicate, dainty, or refined in manner or movement
Example
He walked with mincing steps across the stage.
C2 noun /ˈæntiˌkraɪst/

antichrist

Meaning
A person regarded as the supreme opponent of Christ, often seen as a figure of ultimate evil.
Example
Some people fear the rise of an Antichrist in the future.
C2 adjective /ˈtʃɜːrlɪʃ/

churlish

Meaning
Rude in a mean-spirited and surly way.
Example
It would be churlish to refuse her kind invitation.
C2 noun /əˈdjuː/

adieu

Meaning
A farewell or goodbye, often used in a formal or poetic sense.
Example
She bid her friends adieu before leaving for France.
C2 noun /ˈɒn.rʌʃ/

onrush

Meaning
A sudden powerful forward or downward rush or flow.
Example
The onrush of water swept away the bridge.
C2 verb /ɪnˈtwaɪn/

entwine

Meaning
to twist or wind together; to become closely connected or involved
Example
The vines entwine around the old fence.
C2 noun /kɒŋk/

Conch

Meaning
a large sea shell that can be used as a horn; the marine mollusk that lives in such a shell
Example
The fisherman blew the conch shell to signal the end of the day.
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 noun /biˈætɪtjuːd/

beatitude

Meaning
supreme blessedness or happiness, often used in reference to the sayings of Jesus in the Sermon on the Mount
Example
She felt a state of beatitude after receiving the good news.
C2 adjective /ˈfʊl.dʒənt/

fulgent

Meaning
Shining brightly; dazzling.
Example
The fulgent stars lit up the night sky.
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 /ˈfiːkənd/

fecund

Meaning
producing or capable of producing an abundance of offspring or new growth; fertile
Example
The fecund soil produced a bountiful harvest this year.
C2 noun /ɪmˈprɑːvɪdəns/

improvidence

Meaning
Lack of foresight or care for future needs.
Example
His improvidence led to financial difficulties.
C2 noun /əˈpɒstəsi/

apostasy

Meaning
The abandonment or renunciation of a religious or political belief.
Example
His public apostasy shocked his followers.
C2 verb /ˈdiːɪfaɪ/

deify

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

metonymy

Meaning
A figure of speech in which one word or phrase is substituted with another closely related word or concept.
Example
In the phrase 'the crown will decide,' 'crown' is a metonymy for monarchy.
C2 verb /ʌnˈfɛtər/

unfetter

Meaning
to release from restraint or restriction; to free
Example
The new law will unfetter small businesses from excessive regulations.
C2 noun /ˈkɒnsənəns/

consonance

Meaning
Agreement or harmony among parts; a pleasing combination of sounds in music or words.
Example
The consonance between their ideas made the project successful.
C2 verb /trænzˈmjuːt/

transmute

Meaning
to change in form, nature, or substance
Example
Alchemy aimed to transmute lead into gold.
C2 verb /ˌdɪspəˈzɛs/

dispossess

Meaning
to deprive someone of land, property, or other possessions
Example
The new law threatened to dispossess many farmers of their land.
C2 noun /ˈfɪli/

filly

Meaning
a young female horse
Example
The filly ran swiftly across the meadow.
C2 adjective /ˌɛl.ɪˈdʒaɪ.ək/

elegiac

Meaning
Expressing sorrow, often for something past; resembling an elegy.
Example
The novel ends on an elegiac note, mourning the lost era.
C2 verb /ˌkɒmənˈdɪə/

commandeer

Meaning
To take control or possession of something, often by force or authority.
Example
The soldiers commandeered the villagers’ homes during the war.
C2 noun /ˈjuːnɪvəˌlɛns/

univalence

Meaning
The state of having a single valence or combining power, especially in chemistry.
Example
Hydrogen is characterized by its univalence in chemical reactions.
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 /ˈpɜːrvjuː/

purview

Meaning
the scope or range of authority, responsibility, or knowledge
Example
The case does not fall within the purview of this court.
C2 noun /ˌjuːzɜːrˈpeɪʃən/

usurpation

Meaning
The act of taking someone's power or property illegally or by force.
Example
The general's usurpation of the presidency led to political unrest.
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 adjective /ˈvɪnsəbl/

vincible

Meaning
capable of being overcome or defeated
Example
The enemy seemed vincible after losing their main base.
C2 adjective /ˈməʊdɪʃ/

modish

Meaning
conforming to or following current fashion or style
Example
She wore a modish outfit that caught everyone’s attention.
C2 noun /ˈtaɪroʊ/

tyro

Meaning
A beginner or novice in a field or activity.
Example
As a tyro in programming, she needed constant guidance.
C2 verb /ˈtɛmpəˌraɪz/

temporize

Meaning
To delay making a decision or taking action in order to gain time.
Example
The politician temporized when asked about the controversial issue.
C2 adjective /ˈlaɪðsəm/

lithesome

Meaning
gracefully flexible and supple
Example
Her lithesome figure allowed her to move like a ballerina.
C2 adjective /mɛnˈdeɪʃəs/

mendacious

Meaning
not telling the truth; lying
Example
The politician was known for his mendacious statements.
C2 verb /ˈbɜːrnɪʃ/

burnish

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

deputize

Meaning
To appoint someone as a deputy; to act as a substitute or representative.
Example
The sheriff decided to deputize several locals to help maintain order.
C2 adjective /pərˈspɪkjuəs/

perspicuous

Meaning
Clearly expressed and easily understood; lucid.
Example
The teacher gave a perspicuous explanation of the theory.
C2 noun /ˈmɔɪəti/

moiety

Meaning
One of two equal parts; a half or portion.
Example
The estate was divided into two moieties between the heirs.
C2 noun /ˌdʒer.ɪˈmaɪ.æd/

Jeremiad

Meaning
a long mournful complaint or lamentation; a list of woes; a prolonged expression of grief
Example
The newspaper editorial was a jeremiad about the decline of moral values in society.
C2 noun /dɪˈpɔːrtmənt/

deportment

Meaning
A person's behavior or manners, especially in a formal situation.
Example
Her deportment during the ceremony impressed everyone.
C2 noun /ˈmɒdɪkəm/

modicum

Meaning
a small or moderate amount of something, especially something valuable or desirable
Example
She showed a modicum of patience during the long meeting.
C2 adjective /ɪˈlɪbərəl/

illiberal

Meaning
Opposed to liberal principles; restricting freedom of thought or behavior.
Example
The government was criticized for its illiberal policies.
C2 verb /ˈkʌzən/

cozen

Meaning
to deceive, cheat, or trick someone
Example
He cozened the old man out of his money.
C2 noun /ˈbɒnəmi/

bonhomie

Meaning
Cheerful friendliness and geniality.
Example
The meeting was filled with laughter and bonhomie.
C2 verb /ˈpɛkjʊˌleɪt/

peculate

Meaning
To embezzle or steal money, especially public funds.
Example
The corrupt official was found guilty of peculating government funds.
C2 noun /ˈdaɪɡræf/

digraph

Meaning
A pair of letters representing a single sound, such as 'sh' in 'ship'.
Example
In the word 'phone', the letters 'ph' form a digraph.
C2 noun /ˈtɪŋktʃər/

tincture

Meaning
a slight trace of something; a medicine made by dissolving a drug in alcohol
Example
There was a tincture of sadness in her smile.
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 adjective /ˈlæmbənt/

lambent

Meaning
glowing or flickering softly; having a gentle radiance
Example
The lambent light of the candle filled the room with warmth.
C2 noun /ˌbluː ˈblʌd/

Blue-blood

Meaning
a person of noble birth; aristocrat
Example
She came from a family of blue-bloods with centuries of royal heritage.
C2 verb /ˌpriːɪˈstæblɪʃ/

preestablish

Meaning
To establish or set up beforehand.
Example
Certain rules were preestablished before the meeting.
C2 noun /ˌsɪləbɪˈkeɪʃən/

syllabication

Meaning
The division of words into syllables.
Example
Proper syllabication helps in correct pronunciation.
C2 noun /ˈvɛrɪti/

verity

Meaning
a true principle or belief; the state of being true
Example
The verity of his statement was confirmed by evidence.
C2 noun /ˈaɪ.səˌbɑːr/

isobar

Meaning
A line on a weather map connecting points of equal atmospheric pressure.
Example
The meteorologist explained how isobars indicate wind speed and direction.
C2 noun /kənˈtɔːrʃənz/

contortions

Meaning
plural form of contortion; multiple twisted or bent shapes
Example
The magician's contortions left the crowd in awe.
C2 verb /ɛnˈfrænˌtʃaɪz/

enfranchise

Meaning
To grant the right to vote or other rights of citizenship.
Example
The new law enfranchised thousands of people.
C2 noun /ˈoʊdiəm/

odium

Meaning
general or widespread hatred or disgust directed toward someone as a result of their actions
Example
The scandal brought public odium on the corrupt minister.
C2 adjective /dɪˈrɒɡətɪv/

derogative

Meaning
Expressing a low opinion or showing lack of respect.
Example
He made a derogative remark about her work.
C2 noun /dɪˈklɪvɪti/

declivity

Meaning
a downward slope of ground
Example
They carefully climbed down the declivity of the hill.
C2 noun /ˌhɜːrpəˈtɒlədʒɪst/

herpetologist

Meaning
A scientist who studies reptiles and amphibians.
Example
The herpetologist discovered a new species of frog in the rainforest.
C2 adjective /ɪnˈkoʊətɪv/

inchoative

Meaning
relating to the beginning of something; in an initial stage
Example
The poet used inchoative expressions to depict the dawn of creation.
C2 noun /ˈkænə/

Canna

Meaning
a tropical flowering plant with large, colorful flowers and broad leaves
Example
The bright orange canna lilies grew tall beside the pond.
C2 adjective /pəˈluːsɪd/

pellucid

Meaning
Transparently clear; easy to understand.
Example
The lake water was so pellucid that you could see the stones at the bottom.
C2 adjective /ɪkˈstɛnsəbl/

extensible

Meaning
able to be extended; capable of expansion.
Example
The software is designed to be extensible with new features.
C2 noun /ˈmɒkəsɪn/

moccasin

Meaning
A soft leather shoe, traditionally worn by Native Americans, often made from deerskin.
Example
He slipped on a pair of comfortable moccasins before going outside.
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 adverb /ˈaɪsɪli/

icily

Meaning
In a very cold, unfriendly, or hostile manner.
Example
She replied icily to his question.
C2 noun /ˈdɛkəˌpɒd/

decapod

Meaning
An arthropod with ten limbs, such as crabs, lobsters, and shrimps.
Example
The lobster is a well-known decapod.
C2 verb /ˈwɪn.oʊ/

winnow

Meaning
to remove the less desirable parts from a group; originally, to separate grain from chaff by blowing air
Example
The committee will winnow the list of applicants to ten finalists.
C2 adjective /ˈwæɡ.ɪʃ/

waggish

Meaning
playfully humorous or mischievous
Example
His waggish remarks made everyone laugh.
C2 noun /ˈleʧ.ər/

Lecher

Meaning
a man who behaves in a sexually inappropriate way towards women
Example
The company fired him for being a lecher.
C2 noun /ʃiːt fɪʃ/

Sheat-fish

Meaning
A large freshwater catfish with a broad flat head and long barbels
Example
The sheat-fish is one of the largest freshwater fish in South Asia.
C2 verb /əˈbeɪs/

abase

Meaning
to belittle or degrade someone
Example
He refused to abase himself before the king.
C2 noun /ˈklæŋər/

clangor

Meaning
A loud, resonant, and continuous noise, often metallic.
Example
The clangor of the church bells filled the town square.
C2 verb /əbˈskɒnd/

abscond

Meaning
to leave secretly and quickly, often to avoid arrest or punishment
Example
The thief tried to abscond with the stolen jewelry.
C2 adjective /ˈpruːdɪʃ/

prudish

Meaning
having or revealing a tendency to be easily shocked by matters relating to sex or nudity
Example
She was too prudish to watch the movie with her friends.
C2 noun /ˌviːələnsɛloʊ/

violoncello

Meaning
The full name of the cello, a large string instrument played with a bow and held between the knees.
Example
He practiced the violoncello for hours each day.
C2 noun /ˌpriːdɪˈlɛkʃən/

predilection

Meaning
A strong liking or preference for something.
Example
She has a predilection for classical music.
C2 noun dɪsˈbɜːs.mənt

disbursement

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

habitant

Meaning
An inhabitant; a person or animal that lives in a particular place.
Example
The habitants of the village were friendly and welcoming.
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.
C2 noun /ɡriːn ˈdʒækfruːt/

Green Jackfruit

Meaning
unripe fruit of the jackfruit tree, commonly used as a vegetable in cooking
Example
Green jackfruit is often used in curries and stews.
C2 noun /ˈwɔːrˌmʌŋɡər/

warmonger

Meaning
A person who advocates or promotes war or conflict.
Example
The leader was criticized as a warmonger by his opponents.
C2 noun /pərˈdɪʃən/

perdition

Meaning
A state of eternal spiritual ruin, often referring to hell or damnation.
Example
The preacher warned that greed would lead to perdition.
C2 noun /ɪkˈstɛnsər/

extensor

Meaning
a muscle that serves to extend or straighten a limb or part of the body.
Example
The extensor muscles in the arm help straighten the elbow.
C2 adverb /pəˈfɔːs/

perforce

Meaning
by necessity; inevitably
Example
He had to perforce accept the decision.
C2 adjective /ˌmɛtəˈlɜrdʒɪkəl/

metallurgical

Meaning
Relating to metallurgy or the branch of science concerned with the properties of metals and their production.
Example
He studied metallurgical engineering at the university.
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 noun /ɪnˈfriːkwəns/

infrequence

Meaning
The state of occurring rarely or at long intervals.
Example
The infrequence of their meetings made it hard to maintain close ties.
C2 verb /ɪˈniː.bri.eɪt/

inebriate

Meaning
to intoxicate; to make someone drunk
Example
The strong wine was enough to inebriate even the most experienced drinker.
C2 noun /ˌɔːltərˈkeɪʃən/

altercation

Meaning
a noisy argument or quarrel
Example
There was a brief altercation between the two drivers.
C2 noun /ˈrɛkjʊzənt/

recusant

Meaning
a person who refuses to submit to authority or comply with rules
Example
The recusant opposed the new law.
C2 adjective /ˈfɒp.ɪʃ/

Foppish

Meaning
excessively concerned with one's appearance and clothes; vain about dress
Example
His foppish behavior and expensive clothes made him stand out.
C2 verb /ˌdɪskəmˈpoʊz/

discompose

Meaning
To disturb the order or calmness of something or someone.
Example
The unexpected question seemed to discompose her.
C2 noun /kənˈtrɪʃ.ən/

contrition

Meaning
the state of feeling remorseful and repentant
Example
His contrition was evident after the apology.