pertinacity
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C2 noun ˌpɜː.tɪˈnæs.ɪ.ti

pertinacity

Meaning
Firm determination and persistence in achieving something.
Example
His pertinacity in achieving his goals was inspiring.
C2 noun /ɪnˌtɜːrpəˈleɪʃən/

interpolation

Meaning
The act of inserting something into a text or estimating values within a sequence of data.
Example
The scientist used interpolation to predict the missing data points.
C2 noun /ˈʌp.wel.ɪŋ/

upwelling

Meaning
An oceanographic phenomenon that involves wind-driven motion of dense, cooler, and nutrient-rich water towards the ocean surface.
Example
Upwelling brings nutrients to the ocean surface.
C2 adjective /ˈtɪd.li/

Tiddley

Meaning
slightly drunk; small or tiny
Example
After a few drinks, he felt a bit tiddley.
C2 noun /ˈtælən/

talon

Meaning
A claw, especially one belonging to a bird of prey.
Example
The eagle gripped the fish with its sharp talons.
C2 verb /ˈbeɪɪŋ/

baying

Meaning
making a loud, prolonged barking or howling sound, especially of dogs
Example
The baying of the hounds echoed through the forest.
C2 noun /ʃəˈɡrɪn/

chagrin

Meaning
Distress or embarrassment at having failed or been humiliated.
Example
She left the room in chagrin after forgetting her lines.
C2 verb /ˈpɔːltər/

palter

Meaning
to act insincerely or deceitfully; to equivocate or lie
Example
He paltered when asked about his involvement in the deal.
C2 noun /ˌbrɪɡ.əˈdɪər/

brigadier

Meaning
A military officer rank, usually commanding a brigade.
Example
The brigadier inspected the troops before the parade.
C2 noun /sɛnˈsɔːrɪəm/

sensorium

Meaning
The part of the brain or mind concerned with the reception and interpretation of sensory stimuli.
Example
The patient’s sensorium was clouded after the accident.
C2 noun /ˌædjʊˈleɪʃən/

adulation

Meaning
excessive admiration or flattery
Example
The singer enjoyed the adulation of her fans.
C2 noun /ˈpɒntɪf/

pontiff

Meaning
the pope or a high-ranking bishop in the Christian church
Example
The pontiff addressed the nation in a televised speech.
C2 noun /miːn/

mien

Meaning
A person's appearance or manner, especially as an indication of their character or mood.
Example
His serious mien made everyone fall silent.
C2 verb /ˌkɒntrəˈvɜːrt/

controvert

Meaning
to dispute or argue against; to contradict
Example
The scientist controversed the previous research findings.
C2 adjective /ˈkælkjʊləbl/

calculable

Meaning
Capable of being calculated, estimated, or measured.
Example
The risk involved in the project is calculable.
C2 noun /blæk ˈkɑːr.də.məm/

Black Cardamom

Meaning
a large aromatic spice pod with a smoky flavor, commonly used in Indian and Middle Eastern cooking
Example
Add black cardamom to the curry for a rich, smoky flavor.
C2 adjective /ˌpɜːrtɪˈneɪʃəs/

pertinacious

Meaning
holding firmly to an opinion, purpose, or course of action; stubbornly persistent
Example
The pertinacious lawyer refused to give up the case.
C2 noun /sfɪˈrɒmɪtər/

spherometer

Meaning
An instrument used for measuring the curvature of spherical surfaces.
Example
The scientist used a spherometer to measure the lens curvature.
C2 noun /prɔːŋ/

prong

Meaning
a projecting pointed part, such as one of the pointed ends of a fork
Example
The fork has four prongs.
C2 adjective /ˌɪnɪˈsɛnʃəl/

inessential

Meaning
not necessary or important; not essential
Example
The report removes all inessential details to stay focused.
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 (plural, informal) /skædz/

scads

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

furtherance

Meaning
The advancement or promotion of something.
Example
The new policy was introduced in furtherance of social justice.
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 /paɪər/

pyre

Meaning
A heap of combustible material, especially one used for burning a corpse as part of a funeral ceremony.
Example
The villagers built a pyre to honor the deceased.
C2 verb /ɪnˈtriːt/

entreat

Meaning
To ask earnestly or beg someone to do something.
Example
She entreated him to stay a little longer.
C2 noun /ˈliːdʒənəri/

legionary

Meaning
a soldier in the Roman army
Example
Each legionary carried a shield and a short sword.
C2 noun ˌkɒmpjʊˈteɪʃənəl kəˌmjuːnɪˈkeɪʃən

computational communication

Meaning
Digital exchange and automated interaction; the use of computational methods and systems to facilitate communication and information sharing.
Example
Computational communication is reshaping how we share information.
C2 noun /ɪˈrʌp.ʃən/

Irruption

Meaning
a sudden violent entry; an invasion or raid; a sudden outburst or eruption
Example
The army's irruption into enemy territory caught the opposing forces completely off guard.
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 noun /ˈkɪldʒɔɪ/

killjoy

Meaning
a person who spoils the fun or enjoyment of others
Example
Don’t be a killjoy at the party.
C2 noun /ˈbɑːrtərər/

barterer

Meaning
A person who trades goods or services without using money.
Example
The barterer exchanged fruits for some pottery.
C2 verb /ɪˈmɛnd/

emend

Meaning
to correct or revise a text, especially for errors
Example
The editor emended the manuscript before publication.
C2 verb /ˈsɛreɪt/

serrate

Meaning
To make a saw-toothed edge or notched margin.
Example
The craftsman serrated the knife blade for better cutting.
C2 noun /nɪt/

nit

Meaning
The egg or young form of a louse or other parasitic insect.
Example
The teacher noticed nits in the child’s hair.
C2 noun /ˈkɜːrtʃɪf/

kerchief

Meaning
a piece of cloth worn around the head or neck
Example
She wore a red kerchief on her head.
C2 adjective /ˈvæpɪd/

vapid

Meaning
lacking liveliness, flavor, or interest; dull and uninspired
Example
The lecture was so vapid that half the audience fell asleep.
C2 adjective /ænˈhaɪdrəs/

anhydrous

Meaning
Containing no water.
Example
The chemist used anhydrous ammonia for the experiment.
C2 adjective /bəˈnɛfɪsənt/

beneficent

Meaning
generous or doing good
Example
The beneficent leader donated funds to build a hospital.
C2 verb /ˈlɛvɪteɪt/

levitate

Meaning
to rise or float in the air, usually without visible support.
Example
The magician made the table levitate during the show.
C2 noun /ɪˌkwɪvəˈkeɪʃən/

equivocation

Meaning
The use of ambiguous language to conceal the truth or to avoid committing oneself.
Example
The politician’s equivocation frustrated voters who wanted a clear answer.
C2 noun /ˈrɛv.ər.i/

reverie

Meaning
A state of being pleasantly lost in one's thoughts; a daydream.
Example
Lost in reverie, he didn't hear his name being called.
C2 noun /taɪð/

tithe

Meaning
A tenth part of one’s income or produce, often given as a religious offering.
Example
He gave a tithe of his earnings to the church.
C2 verb /trænˈspoʊz/

transpose

Meaning
to change the order or position of something
Example
The editor transposed two paragraphs in the article.
C2 adjective /ˈtaɪmwɔːrn/

timeworn

Meaning
Worn or impaired by age; old and used many times.
Example
The timeworn house carried a sense of history and nostalgia.
C2 adjective /ˈnɔɪ.səm/

Noisome

Meaning
having an extremely offensive smell; harmful or unpleasant
Example
The noisome smell from the garbage made everyone cover their noses.
C2 noun /ˌænɪmædˈvɜːʒən/

animadversion

Meaning
Strong criticism or censure.
Example
The policy attracted severe animadversion from the public.
C2 noun /fɪˈlændərər/

philanderer

Meaning
a man who habitually engages in casual romantic or sexual affairs
Example
The politician was exposed as a notorious philanderer.
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 verb /haɪˈpɒθɪkeɪt/

hypothecate

Meaning
to pledge something, such as property, as security for a debt without giving up possession of it.
Example
The company hypothecated its assets to secure the loan.
C2 noun /ˈɒlɪv bɑːb/

Olive barb

Meaning
A small freshwater fish with olive-colored body and barbels
Example
The olive barb is commonly found in South Asian rivers.
C2 adjective /ˈvækjuəs/

vacuous

Meaning
Having or showing a lack of thought or intelligence; mindless.
Example
She gave a vacuous smile during the serious discussion.
C2 noun /ˈɜːrtʃɪn/

urchin

Meaning
a mischievous or poorly dressed child, often from the streets
Example
The ragged urchins played by the riverbank.
C2 noun /prəˈlɪksɪti/

prolixity

Meaning
the quality of being tediously wordy and long
Example
The book’s prolixity made it difficult to read in one sitting.
C2 noun /ˈɒlɪv brɑːntʃ/

olive-branch

Meaning
A symbol of peace or reconciliation; an offer to end conflict.
Example
He extended an olive-branch to his rival after years of hostility.
C2 adjective /ˈdʒes.tɪŋ/

Jesting

Meaning
joking or teasing in a playful manner
Example
He was only jesting when he said he would quit his job.
C2 adjective /ˈsæpɪd/

sapid

Meaning
Having a pleasant taste; flavorful.
Example
The chef prepared a sapid dish that delighted everyone at the table.
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 verb /ˈtʃɔːrtl/

chortle

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

coterminous

Meaning
having the same boundaries or extent in space, time, or meaning
Example
The two jurisdictions are coterminous, sharing the same borders.
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 verb /ruː/

rue

Meaning
To feel regret or sorrow about something.
Example
She will rue the day she trusted him.
C2 noun /kɪln/

kiln

Meaning
a furnace or oven for burning, baking, or drying, especially one for firing pottery or bricks
Example
The potter placed the clay pots into the kiln for firing.
C2 adjective /ʌnˈblʌʃɪŋ/

Unblushing

Meaning
showing no shame or embarrassment; boldly shameless
Example
He told the unblushing lie without any hesitation.
C2 noun /ˌbædɪˈnɑːʒ/

badinage

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

exceptionable

Meaning
Open to objection; causing disapproval.
Example
His rude remarks were considered exceptionable by everyone present.
C2 noun /dʒæm/

jamb

Meaning
The side post or surface of a doorway, window, or fireplace.
Example
The carpenter carefully measured the width of the door jamb.
C2 noun /ˈfɔːrˌpiːk/

forepeak

Meaning
The compartment in the forward part of a ship, often used for storage.
Example
The sailors stored extra ropes in the forepeak.
C2 noun /ˈslʌɡərd/

sluggard

Meaning
A lazy, sluggish person.
Example
The sluggard refused to get out of bed even at noon.
C2 adjective /ˌprɒfɪˈlæktɪk/

prophylactic

Meaning
intended to prevent disease or an unwanted outcome; protective
Example
The doctor prescribed a prophylactic treatment to prevent infection.
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 noun /ˈkɒd.ɪ.sɪl/

codicil

Meaning
a legal document that makes changes or additions to an existing will
Example
He added a codicil to his will to include his granddaughter.
C2 verb /ˌdɪsəˈvaʊ/

disavow

Meaning
to deny responsibility for or connection with something
Example
He disavowed any involvement in the scandal.
C2 noun /ˌbæstərdaɪˈzeɪʃən/

bastardization

Meaning
the act of corrupting, degrading, or misrepresenting something
Example
Critics called the remake a bastardization of the original film.
C2 noun /ˈɡoʊld.moʊ.hɜːr/

Goldmohur

Meaning
A tropical tree with bright orange-red flowers, also known as flame tree or royal poinciana
Example
The goldmohur tree bloomed beautifully in the summer heat.
C2 noun /ˈlɪɡ.ə.tʃər/

ligature

Meaning
A thing used for tying or binding tightly; in music/printing, two or more notes or letters joined together.
Example
The doctor used a ligature to stop the bleeding.
C2 noun /ˈpɜr.fɪ.di/

Perfidy

Meaning
deliberate breach of faith or trust; treachery; betrayal of trust
Example
His perfidy shocked all who had trusted him.
C2 adjective /hərˈmɛtɪk/

hermetic

Meaning
Completely sealed, especially so that no air can enter or escape.
Example
The medicine was kept in a hermetic container.
C2 noun /ɪˈskʌtʃən/

escutcheon

Meaning
a shield or emblem bearing a coat of arms
Example
The family crest was displayed on the escutcheon above the fireplace.
C2 adjective /ˈkɒs.ɪ.tɪd/

cosseted

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

inextricable

Meaning
Impossible to separate or escape from.
Example
The two friends shared an inextricable bond.
C2 verb /əbˈvɜːrt/

obvert

Meaning
To turn something so as to face in a different direction; in logic, to convert a proposition by negating both subject and predicate.
Example
The teacher asked the students to obvert the statement for practice.
C2 verb /ˌpriːɪɡˈzɪst/

preexist

Meaning
to exist beforehand or before something else
Example
These customs preexist the arrival of modern technology.
C2 noun /juːˈkeɪs/

ukase

Meaning
An authoritative decree or order, especially one issued by a sovereign or government.
Example
The czar issued a ukase restricting the freedom of the press.
C2 adjective /ˈhæl.si.ən/

halcyon

Meaning
calm, peaceful, and happy; denoting a period of time in the past that was idyllically happy and peaceful
Example
She often reminisces about the halcyon days of her childhood.
C2 noun /wiːl/

weal

Meaning
A raised mark on the skin left after a blow; or general well-being and prosperity.
Example
The charity worked for the common weal of the community.
C2 adjective /ˌpaɪroʊˈtɛknɪk/

pyrotechnic

Meaning
Relating to fireworks or spectacular displays involving fire.
Example
The city celebrated with a grand pyrotechnic display on New Year's Eve.
C2 verb /bɪˈleɪt/

belate

Meaning
to delay or make late
Example
Heavy traffic belated our arrival at the party.
C2 noun /ˈhɒthɛd/

hothead

Meaning
a person who acts quickly and without thinking when angry
Example
He is such a hothead that he often starts arguments.
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, adverb /ˈsaɪdlɔːŋ/

sidelong

Meaning
Directed to the side; indirect, furtive, or not straightforward.
Example
She gave him a sidelong glance across the room.
C2 adjective /dɪˈmɒtɪk/

demotic

Meaning
relating to ordinary people or everyday language
Example
The poet used demotic language to connect with common readers.
C2 noun /ˈvoʊtəri/

votary

Meaning
A devoted follower or admirer of someone or something.
Example
He is a votary of classical music and attends every concert.
C2 verb /ˌɛfəˈvɛs/

effervesce

Meaning
To give off bubbles of gas; to show excitement, liveliness, or enthusiasm.
Example
The soda began to effervesce as soon as it was opened.
C2 noun /ˌɪnvəˈkeɪʃən/

invocation

Meaning
the act of calling upon a higher power for help, blessing, or inspiration
Example
The ceremony began with an invocation to the gods.
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 /pɔːrˈtɛntəs/

portentous

Meaning
Giving a sign or warning that something, often bad or serious, is going to happen; or overly solemn and pompous.
Example
His portentous tone made everyone nervous about the news.
C2 adjective /ˈnɛtlˌsʌm/

nettlesome

Meaning
Causing irritation, annoyance, or difficulty.
Example
The nettlesome rules frustrated the workers.
C2 noun /ænˈtɪpədiːz/

antipodes

Meaning
places on opposite sides of the Earth; also refers to things that are direct opposites
Example
Australia and Britain are often considered antipodes of each other.
C2 adjective /vɜːrˈtɪdʒɪnəs/

vertiginous

Meaning
Causing dizziness due to great height or steepness.
Example
The tourists looked down from the vertiginous cliffs with awe.
C2 noun /ˈlɒdʒ.mənt/

lodgment

Meaning
The act of lodging or a place of temporary stay; also a deposit of something.
Example
The soldiers found lodgment in the abandoned house.
C2 noun /ˈnɛkrəˌmænsər/

necromancer

Meaning
a person who practices necromancy; a wizard or magician who claims to communicate with the dead
Example
The villagers feared the old necromancer who lived at the edge of the forest.
C2 adjective /rəˈkoʊkoʊ/

rococo

Meaning
characterized by ornate detail and elaborate decoration, especially in art, architecture, and design
Example
The palace was decorated in a lavish rococo style.
C2 adjective /pəˈlædʒ.ɪk/

pelagic

Meaning
Relating to the open sea or ocean water column, away from the shore.
Example
Pelagic fish like tuna are found far from the coast.
C2 noun /ˈkæm.fər/

Camphor

Meaning
a white crystalline substance with a strong aromatic smell, used in medicine and religious ceremonies
Example
The temple was filled with the fragrant smoke of burning camphor.
C2 noun /ˈmʌskɪt/

musket

Meaning
a type of long gun used in the past, especially by infantry soldiers
Example
The soldiers carried muskets into the battlefield.
C2 noun /ɒmˈnɪpətəns/

omnipotence

Meaning
The quality of having unlimited power or authority.
Example
Many religions describe God’s omnipotence as absolute.
C2 adjective /kəˈmɛnʃərət/

commensurate

Meaning
corresponding in size, degree, or extent; proportionate
Example
Salary will be commensurate with experience.
C2 verb /ˌnɒnˈplʌst/

nonplused

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

ingrate

Meaning
An ungrateful person; someone who shows no appreciation.
Example
He worked hard for his friend, but the ingrate never thanked him.
C2 noun, verb /ˈkaʊntərˌtʃɑːrdʒ/

countercharge

Meaning
an opposing charge or accusation; to make an opposing attack
Example
The lawyer filed a countercharge against the accuser.
C2 adjective /ˈviː.ni.əl/

Venial

Meaning
forgivable; not seriously wrong; minor
Example
His late arrival was considered a venial offense.
C2 noun /proʊˈbɑːsɪs/

proboscis

Meaning
The long, flexible nose of some animals, especially an elephant, or a tubular feeding and sucking organ in insects.
Example
The elephant used its proboscis to grab food.
C2 adjective ˌʌn.əˈseɪ.lə.bəl

unassailable

Meaning
Unable to be attacked, questioned, or defeated.
Example
An unassailable position ensures dominance.
C2 adjective /vəˈlʌptʃuəs/

voluptuous

Meaning
Relating to or characterized by luxury and sensual pleasure; sexually attractive.
Example
The artist painted a voluptuous figure reclining on the couch.
C2 adjective /ˈpɛktərəl/

pectoral

Meaning
Relating to the chest or breast.
Example
The athlete focused on strengthening his pectoral muscles.
C2 adjective /ˈtɛsəleɪtɪd/

tessellated

Meaning
arranged in a pattern of repeated shapes fitting together without gaps
Example
The tessellated floor was made of colorful tiles arranged in perfect symmetry.
C2 noun /ˈmɪsənˌθroʊp/

misanthrope

Meaning
a person who dislikes or distrusts humankind
Example
The old man was considered a misanthrope who avoided all social gatherings.
C2 noun /ɡænˈdʒɛtɪk liːf fɪʃ/

Gangetic Leaf Fish

Meaning
a small freshwater fish species found in the Ganges river system, known for its leaf-like appearance
Example
The Gangetic Leaf Fish is commonly found in the rivers of Bangladesh.
C2 verb /ɪˈmjʊər/

immure

Meaning
to confine or enclose someone against their will
Example
The prisoner was immured in a dark cell.
C2 verb /ɜːrk/

irk

Meaning
to annoy or irritate someone
Example
It irks me when people are late without calling.