arrhythmic
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C2 adjective /eɪˈrɪðmɪk/

arrhythmic

Meaning
Lacking a regular rhythm or beat.
Example
The patient had an arrhythmic heartbeat.
C2 noun /ˈaɪ.kɒn/

ikon

Meaning
A religious image or symbol, especially in the Eastern Orthodox Church.
Example
The church displayed a beautifully painted ikon of the Virgin Mary.
C2 adjective /ˈpɑːrtəbl/

partible

Meaning
capable of being divided or separated
Example
The estate was partible among the heirs.
C2 noun /kwɪˈɛsəns/

quiescence

Meaning
A state of quietness, inactivity, or dormancy.
Example
The volcano has been in a state of quiescence for decades.
C2 noun /ˈriːbəs/

rebus

Meaning
a puzzle in which words are represented by pictures, symbols, or letters
Example
The children enjoyed solving the rebus puzzles in the magazine.
C2 adjective /əbˈtruːsɪv/

obtrusive

Meaning
noticeable in an unpleasant or unwelcome way; intrusive
Example
The advertisement was so obtrusive that it ruined the user’s experience.
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 /ˈsaɪ.nəˌʃʊr/

cynosure

Meaning
A person or thing that is the center of attention or admiration.
Example
She was the cynosure of all eyes at the party.
C2 noun, verb /ˈæseɪ/

assay

Meaning
To test or analyze the quality, purity, or content of a substance; the act of such testing.
Example
The scientists assayed the mineral sample for gold content.
C2 verb /ˌdɒmɪˈnɪə/

domineer

Meaning
to assert one's will over another in an arrogant way
Example
He tends to domineer over his younger colleagues.
C2 adjective /ˈbʌmpʃəs/

bumptious

Meaning
Arrogantly self-assertive or conceited.
Example
The bumptious student interrupted the teacher several times.
C2 noun /ˈkjʊriˌoʊ/

curio

Meaning
a small unusual or interesting object, often collected for its rarity
Example
She bought a curio from the antique shop.
C2 adjective /ˈtɔɪl.səm/

toilsome

Meaning
Involving hard or exhausting work; laborious.
Example
The workers had a toilsome day in the hot sun.
C2 verb /ɪsˈtʃuː/

eschew

Meaning
to deliberately avoid or abstain from something
Example
She chose to eschew junk food for a healthier diet.
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 noun /ˈaɪdlər/

idler

Meaning
A person who avoids work or spends time lazily.
Example
He was known as an idler who wasted his days.
C2 noun /ˈnɛkrəˌmænsi/

necromancy

Meaning
the practice of communicating with the dead, often to predict the future
Example
Ancient texts described rituals of necromancy performed by priests.
C2 adjective ˌnjʊəroʊˈkɒɡnɪtɪv

neurocognitive

Meaning
Related to brain information processing and memory power
Example
Neurocognitive functions decline due to lack of sleep.
C2 noun /ˌfrɪdʒɪˈdɛːriəm/

frigidarium

Meaning
a large cold pool in ancient Roman baths used for cooling off after hot baths
Example
The ruins of the Roman frigidarium are still visible today.
C2 verb /ˈflædʒəˌleɪt/

flagellate

Meaning
to whip or flog someone, either literally or as a form of punishment or self-discipline
Example
In history, some monks would flagellate themselves as penance.
C2 noun /səbˈdʌk.ʃən/

subduction

Meaning
The lateral and downward movement of the edge of a plate of the earth's crust into the mantle beneath another plate.
Example
The Pacific Ring of Fire is an area of intense subduction.
C2 noun /ˈnoʊmənˌkleɪtʃər/

nomenclature

Meaning
A system of names or terms used in a particular science, art, or field.
Example
The chemical nomenclature can be difficult for beginners to understand.
C2 adjective /bjuːˈkɒlɪk/

bucolic

Meaning
Relating to the pleasant aspects of the countryside and country life.
Example
They enjoyed a bucolic picnic by the river.
C2 noun, adjective /ˌtætərdɪˈmeɪliən/

tatterdemalion

Meaning
A person dressed in ragged clothes; ragged or dilapidated in appearance.
Example
A tatterdemalion wandered the streets in search of food.
C2 adjective /pərˈsɪpiənt/

percipient

Meaning
Having good understanding or insight; able to perceive things clearly.
Example
As a percipient critic, she recognized the deeper meaning of the play.
C2 noun /ˈmeɪlstrəm/

maelstrom

Meaning
A powerful whirlpool in the sea or a situation of confused movement and turmoil.
Example
The ship was caught in a maelstrom of waves and wind.
C2 noun /ˈɡræfaɪt/

graphite

Meaning
a soft, black form of carbon used in pencils and as a lubricant
Example
The artist sketched the portrait using a graphite pencil.
C2 noun /ˈdɛkəˌliːtər/

decaliter

Meaning
A metric unit of capacity equal to ten liters.
Example
The container could hold up to one decaliter of water.
C2 adjective /ˈspiːʃəs/

specious

Meaning
Superficially plausible but actually false; misleading in appearance.
Example
The politician’s argument was specious, sounding convincing but lacking real evidence.
C2 noun kəmˈpʌŋk.ʃən

compunction

Meaning
A feeling of guilt or moral scruple that prevents or follows the doing of something bad.
Example
He felt compunction after lying to his friend.
C2 adjective /ˈtɔːrpɪd/

torpid

Meaning
Mentally or physically inactive; sluggish or lethargic.
Example
After the long hike, he felt torpid and unmotivated.
C2 adjective /ˌɪndɪˈtɜːrmənət/

indeterminate

Meaning
Not exactly known, defined, or established; vague or uncertain.
Example
The project was delayed for an indeterminate amount of time.
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 noun /ˌɪn.trəˈɡreʃ.ən/

introgression

Meaning
The transfer of genetic information from one species to another through repeated backcrossing.
Example
Introgression plays a significant role in plant breeding.
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 /bɪˈθɪŋk/

bethink

Meaning
to cause oneself to consider or remember something
Example
He bethought himself of the promise he had made.
C2 noun /ɛmˈpɔːriəm/

emporium

Meaning
A large retail store selling a wide variety of goods.
Example
They visited the new emporium to buy furniture and home decor.
C2 adjective /ˈɪnˌbrɛd/

inbred

Meaning
existing naturally in a person or animal; also related to reproduction within a limited community
Example
He has an inbred sense of loyalty.
C2 verb /ɪkˈspɒstjʊleɪt/

expostulate

Meaning
to express strong disapproval or disagreement
Example
She expostulated with her friend about the risky decision.
C2 noun /ˈlɪtɪɡənt/

litigant

Meaning
a person involved in a lawsuit
Example
The court summoned both litigants for the hearing.
C2 adjective /ˈeɪ.li.ə.nə.bəl/

alienable

Meaning
Able to be transferred or surrendered, usually referring to rights or property.
Example
Property rights are alienable and can be sold or transferred.
C2 noun /maɪˈnjuːʃə/

minutia

Meaning
a small or trivial detail of something
Example
He was bored by the minutia of office paperwork.
C2 noun /traɪst/

tryst

Meaning
a private romantic meeting between lovers
Example
They arranged a secret tryst in the park.
C2 noun /pəˈtruːn/

poltroon

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

exegesis

Meaning
A critical explanation or interpretation of a text, especially a religious scripture.
Example
The professor gave a detailed exegesis of the biblical passage.
C2 noun /daɪˈvʌldʒəns/

divulgence

Meaning
the act of revealing or disclosing something secret or private
Example
The divulgence of company secrets caused a major scandal.
C2 noun /ˈkreɪniəm/

cranium

Meaning
the skull, especially the part enclosing the brain
Example
The archaeologists carefully examined the ancient cranium.
C2 adjective /dɪˈmoʊniˌæk/

demoniac

Meaning
possessed, produced, or influenced by a demon; frenzied or violent
Example
The soldiers fought with demoniac fury.
C2 adjective /ɪmˈpruːdənt/

imprudent

Meaning
Not showing care for the consequences of an action.
Example
It was imprudent to drive in such stormy weather.
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 /ˈpær.ɪ.saɪd/

parricide

Meaning
The act of killing one's father, mother, or other close relative.
Example
The court tried him for parricide after the tragic incident.
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 /ˈkɪləˌliːtər/

kiloliter

Meaning
a unit of capacity equal to 1,000 liters
Example
The tank can hold up to three kiloliters of water.
C2 verb /bɪˈfʌdəl/

befuddle

Meaning
to confuse someone completely; to make someone unable to think clearly
Example
The complex instructions befuddled the students.
C2 noun /ˈpɛntæd/

pentad

Meaning
A group or set of five things.
Example
The committee was divided into a pentad of working groups.
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 noun /ˈsɪŋ.krə.ni/

synchrony

Meaning
Coordination in time, harmony in action or movement.
Example
Their dance performance showed perfect synchrony.
C2 noun /ˈkwɔːrtoʊ/

quarto

Meaning
A book size resulting from folding each printed sheet into four leaves (eight pages).
Example
The library has rare Shakespeare quartos.
C2 noun /ˈθrɛnədi/

threnody

Meaning
A song, poem, or speech of mourning for someone who has died; a lament.
Example
The poet composed a moving threnody for the fallen soldiers.
C2 noun /ˈpɛnjʊri/

penury

Meaning
extreme poverty or destitution
Example
He grew up in penury but became successful later in life.
C2 verb /ɪˈvɪns/

evince

Meaning
to show or demonstrate clearly
Example
She evinced her interest in the project through active participation.
C2 verb /kənˈvʌls/

convulse

Meaning
to shake violently; to suffer sudden involuntary contractions
Example
The patient convulsed during the seizure.
C2 noun /ˈpɜr.kwɪ.zɪt/

Perquisite

Meaning
an additional benefit or privilege given to an employee beyond their regular salary; a special right or advantage
Example
Company car was one of the perquisites of his executive position.
C2 verb /prɪˈpɒndəreɪt/

preponderate

Meaning
To be greater in influence, weight, or number.
Example
In the debate, logical arguments preponderated over emotional appeals.
C2 noun (plural) /əˈspɜːr.ʒənz/

aspersions

Meaning
Critical or slanderous remarks; multiple attacks on reputation.
Example
The politician rejected the aspersions cast against him.
C2 noun /ˈeɪ.pi.ˌɛr.i/

apiary

Meaning
A place where beehives are kept, especially for commercial purposes.
Example
The farmer built a new apiary to produce organic honey.
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 /səˈlɪsɪtəs/

solicitous

Meaning
showing concern or care for someone's health, happiness, or comfort
Example
She was always solicitous about the well-being of her students.
C2 noun /ˌɛfləˈrɛsəns/

efflorescence

Meaning
the process of flowering or reaching an optimal stage of development
Example
The garden was at the peak of its efflorescence in spring.
C2 noun /ˌæk.wiˈes.əns/

acquiescence

Meaning
The reluctant acceptance of something without protest.
Example
His silent acquiescence to unfair rules was surprising.
C2 verb /ˈmɔːrtɪfaɪ/

mortify

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

irreverential

Meaning
Showing a lack of respect for things that are generally taken seriously.
Example
His irreverential humor often shocked traditional audiences.
C2 verb /bɪˈsmɜːrtʃ/

besmirch

Meaning
to damage someone's reputation; to make dirty or stained
Example
He tried to besmirch her good name with false rumors.
C2 adjective /əˈvʌŋkjələr/

avuncular

Meaning
kind and friendly, like an uncle
Example
He had an avuncular manner that made everyone feel comfortable.
C2 noun /ˈɡleɪziər/

glazier

Meaning
a person whose job is to fit glass into windows and doors
Example
The glazier repaired the broken window in our house.
C2 adjective /ˌhæɡ.i.əˈɡræf.ɪk/

hagiographic

Meaning
Excessively flattering or idealized, often in a biography or portrayal of someone.
Example
The documentary was criticized for its hagiographic portrayal of the leader.
C2 noun /fækˈsɪmɪli/

facsimile

Meaning
an exact copy or reproduction of a document
Example
He sent a facsimile of the contract to the client.
C2 noun /ˌrɛtroʊˈɡrɛʃən/

retrogression

Meaning
a return to a worse or less developed state
Example
The country experienced economic retrogression after the crisis.
C2 noun /kəˈpærɪsən/

caparison

Meaning
an ornamental covering for a horse; rich and elaborate clothing or decoration
Example
The king’s horse was adorned with a golden caparison.
C2 noun /ˈkoʊ.tə.ri/

coterie

Meaning
a small, exclusive group of people with shared interests
Example
He belonged to a coterie of artists who met every Friday.
C2 noun /brəˈkeɪd/

brocade

Meaning
a rich fabric woven with a raised pattern, often in gold or silver thread
Example
She wore a beautiful brocade dress to the wedding.
C2 verb /ˈhæloʊ/

hallow

Meaning
to honor as holy; to make sacred or greatly respected
Example
The ancient temple was hallowed by centuries of worship.
C2 adjective /əˈsiːtɪk/

acetic

Meaning
relating to or containing acetic acid; sour or vinegary in taste or smell
Example
The acetic smell of vinegar filled the kitchen.
C2 verb /ɪɡˈzɪləreɪt/

exhilarate

Meaning
To make someone feel very happy, animated, or excited.
Example
The mountain view exhilarated the travelers.
C2 noun /kəˈlɒsəs/

colossus

Meaning
A person or thing of enormous size, importance, or ability.
Example
Einstein was a colossus in the world of science.
C2 adjective /ˈroʊziət/

roseate

Meaning
Having a pink color; optimistic or idealistic.
Example
She looked at the future with roseate optimism.
C2 noun /kɪθ/

kith

Meaning
Friends, acquaintances, and relations.
Example
He invited all his kith and kin to the wedding.
C2 noun /dɪˈbɔːtʃəri/

debauchery

Meaning
excessive indulgence in sensual pleasures; corruption or vice
Example
The novel depicts the debauchery of the aristocrats in the city.
C2 verb ɪmˈbaɪb

imbibe

Meaning
Absorb or assimilate ideas or knowledge. To drink or take in.
Example
He tried to imbibe the wisdom from his mentor.
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 /ɑːlˈfækʃən/

olfaction

Meaning
The sense of smell; the process of detecting and perceiving odors.
Example
Dogs have a highly developed sense of olfaction.
C2 adjective /ˈliːənaɪn/

leonine

Meaning
Of or resembling a lion.
Example
His leonine hair made him stand out in the crowd.
C2 adjective /ˈæprəbəˌtɔːri/

approbatory

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

prosody

Meaning
The patterns of rhythm and sound used in poetry and speech.
Example
The professor explained how prosody affects the mood of a poem.
C2 adjective /juːˈʒʊəriəs/

usurious

Meaning
Charging excessively high interest rates on loans.
Example
The bank was accused of offering loans at usurious rates.
C2 noun /ˌniːoʊˈlætɪn/

neo-latin

Meaning
The use of Latin language for scholarly, scientific, and literary purposes after the medieval period.
Example
Many scientific names are derived from Neo-Latin.
C2 verb /ˈɡrʌvəl/

grovel

Meaning
To act in an excessively humble or submissive way to gain favor.
Example
He groveled before his boss to avoid punishment.
C2 noun /ˈeɪʒən siː bæs/

Asian sea bass

Meaning
a large predatory fish found in coastal waters and estuaries of the Indo-Pacific region, prized for its white meat
Example
Asian sea bass is highly valued in aquaculture for its fast growth.
C2 noun /prəˈfjuːʒən/

profusion

Meaning
an abundance or large quantity of something
Example
Spring brought a profusion of wildflowers to the valley.
C2 verb /ˈdʒɛn.juˌflɛkt/

genuflect

Meaning
to bend one or both knees as a sign of reverence or worship
Example
The worshippers genuflect before the altar.
C2 noun /ˈpɛd.ən.tri/

pedantry

Meaning
Excessive concern with minor details or rules.
Example
His pedantry made the meeting unnecessarily long.
C2 verb /rɔɪl/

roil

Meaning
to make a liquid muddy or disturbed; to cause agitation or disorder
Example
The constant protests roiled the city streets.
C2 verb /ˈwiːdəl/

wheedle

Meaning
to persuade or coax someone by using flattery or smooth talk
Example
She managed to wheedle extra pocket money from her father.
C2 adjective /ˈɛrzæts/

ersatz

Meaning
made or used as a substitute, typically an inferior one
Example
The cheap shoes were made of ersatz leather.
C2 noun /ˈnɛtl̩/

nettle

Meaning
a plant with stinging hairs that cause irritation when touched
Example
He accidentally brushed against the nettle and felt a sharp sting.
C2 noun /ˈdrʌmɪt/

Drumet

Meaning
a small drum used in military or marching bands
Example
The drummer played a steady beat on the drumet during the parade.
C2 noun /ˈdaɪˌsɪləbəl/

disyllable

Meaning
a word consisting of two syllables
Example
The word 'happy' is a disyllable.
C2 noun /əˈspɜːr.ʒən/

aspersion

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

distrain

Meaning
to seize someone's property in order to obtain payment of rent or other money owed
Example
The landlord distrained the tenant's furniture for unpaid rent.
C2 verb /bɪˈlaɪ/

belie

Meaning
To give a false impression of something; to contradict.
Example
His calm face belied his inner anxiety.
C2 noun /ˈkrɪsəndəm/

christendom

Meaning
the worldwide body or community of Christians
Example
The news spread quickly across Christendom.
C2 adjective/noun /haɪˈbɜːrniən/

hibernian

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

benignant

Meaning
Kindly and benevolent in nature.
Example
The teacher’s benignant attitude made the students feel comfortable.
C2 noun /ɪˈfɛmɪnəsi/

effeminacy

Meaning
The quality of showing traits traditionally associated with women, such as delicacy or softness.
Example
In ancient times, effeminacy was often criticized as a sign of weakness.
C2 verb /dɪˈkæmp/

decamp

Meaning
To depart suddenly or secretly, often to avoid trouble or escape.
Example
The thief decamped before the police arrived.
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 adjective /ˌpɒliˈæn.ɪ.ɪʃ/

pollyannaish

Meaning
overly or blindly optimistic
Example
Her pollyannaish attitude ignored the obvious problems.
C2 verb /ˈhɛktər/

hector

Meaning
To talk to someone in a bullying or intimidating way.
Example
The manager hectored the staff into working overtime.
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 adjective /ˈskʌr.ɪ.ləs/

scurrilous

Meaning
Using or expressed in coarse, abusive, or slanderous language.
Example
The politician faced criticism for his scurrilous remarks about his opponent.