diffident
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C2 adjective /ˈdɪfɪdənt/

diffident

Meaning
Shy or lacking confidence in one's own abilities.
Example
He was too diffident to ask a question in class.
C2 noun /ˈaɪ.lət/

islet

Meaning
A very small island.
Example
The fishermen rested on a tiny islet before continuing their journey.
C2 verb /ˈfɜːrbɪʃ/

furbish

Meaning
to polish, renovate, or give a fresh look to something
Example
The workers furbished the old sword until it gleamed like new.
C2 adjective /ˌpɛnɪˈtɛnʃəl/

penitential

Meaning
Relating to or expressing penitence or penance.
Example
The priest delivered a penitential sermon on forgiveness.
C2 adjective /ɪnˈsɪpɪd/

insipid

Meaning
lacking flavor, interest, or excitement; dull
Example
The soup was insipid and needed more seasoning.
C2 prefix /dɪs-/

dys-

Meaning
A prefix meaning abnormal, bad, difficult, or impaired.
Example
Words like 'dysfunction' and 'dyslexia' use the prefix dys- to indicate difficulty or impairment.
C2 adjective /ˈhɔːrtətɔːri/

hortatory

Meaning
Intended to encourage or urge to action.
Example
The manager’s hortatory words inspired the team to work harder.
C2 verb /kəˈmɪŋɡəl/

commingle

Meaning
To mix or blend different things together.
Example
The charity does not commingle donations with operational funds.
C2 adjective /ˈfrɒθi/

frothy

Meaning
Full of or covered with small bubbles; light and insubstantial.
Example
She ordered a cup of frothy cappuccino.
C2 noun /ˈkreɪniəm/

cranium

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

Voluble

Meaning
speaking fluently and readily; talkative; having a continuous flow of words
Example
The voluble salesman talked for hours about his products.
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 noun /ˈɒfərtɔːri/

offertory

Meaning
The part of a religious service when offerings are collected; the offering itself.
Example
The offertory was taken during the Sunday service.
C2 adjective /juːˈʒʊəriəs/

usurious

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

sanguineous

Meaning
Relating to blood; bloody.
Example
The surgeon examined the sanguineous discharge from the wound.
C2 noun /ˈfriːˌbuːtər/

freebooter

Meaning
A pirate or plunderer who roams freely in search of wealth.
Example
The freebooter raided the merchant ships along the coast.
C2 noun /broʊɡ/

brogue

Meaning
A strong outdoor shoe; also a marked accent, especially Irish or Scottish.
Example
He bought a pair of stylish brogues for the wedding.
C2 noun /bəˈlɛəroʊ/

bolero

Meaning
A Spanish dance in slow triple time, or a short jacket open at the front.
Example
The dancers performed a passionate bolero at the festival.
C2 noun /ˌiː.kəʊ.tɒkˈsɪ.kə.lə.dʒi/

ecotoxicology

Meaning
The study of the effects of chemical pollution on the environment.
Example
Ecotoxicology studies the effects of pesticides on wildlife.
C2 adjective /ˌɪnkænˈdɛsənt/

incandescent

Meaning
emitting light as a result of being heated; extremely bright or passionate
Example
The incandescent lamp lit up the entire hall.
C2 noun /ˌsɜːrkəmləˈkjuːʃn/

circumlocution

Meaning
the use of many words when fewer would do, especially to avoid stating something directly
Example
The politician's speech was filled with circumlocution.
C2 noun /ˈlɔːŋ.ɡən/

Longan

Meaning
a small round tropical fruit with translucent white flesh and sweet taste, related to lychee
Example
Longan fruits are often eaten fresh or dried and are popular in Asian desserts.
C2 noun ˈlɪɡ.nəʊˌsæt

LignoSat

Meaning
A wooden satellite that demonstrates the use of wood in space technology.
Example
LignoSat demonstrates the use of wood in space.
C2 verb /ˈtɪtəleɪt/

titillate

Meaning
To excite or amuse, especially in a slightly sexual or playful way.
Example
The comedian's jokes titillated the audience.
C2 noun /waɪl/

wile

Meaning
A trick or clever scheme meant to deceive or outwit someone.
Example
He used every wile to win her trust.
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 verb /ˈprɛsɪdʒ/

presage

Meaning
to be a sign or warning that something will happen; to foreshadow
Example
Dark clouds presage a storm.
C2 noun /ˈɡrɑːtoʊ/

grotto

Meaning
a small picturesque cave, often artificial
Example
Tourists visited the grotto hidden behind the waterfall.
C2 adjective /ˌaɪ.kə.nəˈklæs.tɪk/

iconoclastic

Meaning
Characterized by attacking or rejecting cherished beliefs, traditions, or established values.
Example
Her iconoclastic views challenged the conventional wisdom of the industry.
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 ˌmɛtəkɒɡˈnɪʃən

metacognition

Meaning
Awareness and understanding of one's own thought processes
Example
Metacognition enhances problem-solving abilities.
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 noun /ˈdɒɡərəl/

doggerel

Meaning
Comic or irregular verse, often poorly constructed and lacking in artistic quality.
Example
The poet’s work was dismissed as mere doggerel by the critics.
C2 verb /ˈblʌstər/

bluster

Meaning
to speak loudly in an aggressive or threatening way, often without real power
Example
The manager blustered about firing people but did nothing.
C2 verb /ˈɔːɡər/

augur

Meaning
To be a sign of something to come; to predict or foretell.
Example
Dark clouds augur a coming storm.
C2 adjective /ˌfæntæzməˈɡɒrɪkəl/

phantasmagorical

Meaning
Having a fantastic, dreamlike, or surreal appearance, often shifting or illusory.
Example
The movie created a phantasmagorical vision of another world.
C2 noun /ˌæprəˈbeɪʃən/

approbation

Meaning
approval or praise
Example
The plan won the approbation of the board members.
C2 noun /ˌhæŋ.ər ˈɒn/

hanger-on

Meaning
a person who spends time with a powerful or famous person to gain benefits.
Example
The celebrity was always surrounded by hangers-on.
C2 noun /ˌprɒdɪˈɡæləti/

prodigality

Meaning
the quality of being wastefully extravagant
Example
His prodigality with money left him bankrupt.
C2 adjective /ˈrɪbɔːld/

ribald

Meaning
Referring to sexual matters in a humorous or vulgar way.
Example
The comedian’s ribald jokes made the audience laugh uncomfortably.
C2 adjective /ˌoʊvərˈwiːnɪŋ/

overweening

Meaning
excessively arrogant or prideful
Example
His overweening pride cost him many friends.
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 /ˈnjuːmɪnəs/

numinous

Meaning
having a strong spiritual or mysterious quality
Example
The temple had a numinous atmosphere that inspired awe.
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 /bɪˈtroʊðəl/

betrothal

Meaning
The formal engagement to be married.
Example
Their betrothal was announced to the whole village.
C2 noun /ˌɪmprəˈsɑːrioʊ/

impresario

Meaning
A person who organizes or finances concerts, plays, or operas.
Example
The impresario arranged a series of concerts for the rising star.
C2 noun /ˈmæl.kənˌtɛnt/

malcontent

Meaning
A person who is dissatisfied or rebellious; one who is not content.
Example
The malcontent voiced his grievances against the government.
C2 adjective /bɪˈhoʊldən/

beholden

Meaning
indebted or obliged to someone for a service or help
Example
He felt beholden to his mentor for all the guidance.
C2 noun /mjuːz/

mews

Meaning
A row or street of houses or apartments that have been converted from stables or built to look like former stables.
Example
They rented a small flat in a quiet London mews.
C2 adjective /ˈvɜːrnəl/

vernal

Meaning
related to spring; fresh, youthful
Example
The garden was filled with vernal beauty after the long winter.
C2 noun /ˌpɛkjʊˈleɪʃən/

peculation

Meaning
The act of embezzling or stealing money, especially from public funds.
Example
The minister resigned after being accused of peculation.
C2 noun /səˈlɛrɪti/

celerity

Meaning
swiftness of movement; speed
Example
The soldier moved with great celerity to deliver the message.
C2 noun /dɪˈtrækʃən/

detraction

Meaning
The act of belittling or taking away from the value of something.
Example
Her constant detraction of others made her unpopular.
C2 noun /ˈhoʊl.stər/

holster

Meaning
A holder or case for carrying a gun, typically worn on a belt or shoulder.
Example
The sheriff kept his revolver in a leather holster.
C2 adjective /ˌmæl.əˈfɪʃ.ənt/

maleficient

Meaning
Doing harm or evil; having a harmful effect.
Example
The maleficient acts of the tyrant ruined the kingdom.
C2 noun /njuːˈmɪzmətɪst/

numismatist

Meaning
A person who studies or collects coins, paper currency, and medals.
Example
The numismatist displayed his rare coin collection at the exhibition.
C2 noun /ˈplænɪsfɪr/

planisphere

Meaning
a rotating star chart used to display the visible stars for any time and date
Example
The astronomer used a planisphere to identify the constellations.
C2 noun /ɪnˈhɪərəns/

inherence

Meaning
The state of being an essential or permanent part of something.
Example
The inherence of risk is part of every business venture.
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 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 /ʃəˈɡrɪn/

chagrin

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

pungency

Meaning
The quality of having a strong, sharp taste or smell.
Example
The pungency of garlic filled the kitchen.
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 noun /prəˈfʌn.dɪ.ti/

profundity

Meaning
Deep insight; great depth of knowledge or thought.
Example
The profundity of his words left a lasting impact.
C2 verb /pərˈveɪ/

purvey

Meaning
to supply or provide goods, services, or information, often as a business
Example
The company purveys organic food to health-conscious customers.
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 adjective, adverb /ˌmæləprəˈpoʊ/

malapropos

Meaning
inappropriate or unsuitable; at an inconvenient or inappropriate time
Example
His comment was malapropos during the serious discussion.
C2 noun /ɪmˈpjuːɪsəns/

impuissance

Meaning
inability to take effective action; helplessness
Example
The government’s impuissance in the face of crisis frustrated the people.
C2 noun /ˈsteɪtkraft/

statecraft

Meaning
The art of governing and managing state affairs effectively.
Example
The leader was praised for his exceptional statecraft in handling international relations.
C2 noun /kənˈkɔːrdəns/

concordance

Meaning
Agreement; also an alphabetical index of the principal words in a book.
Example
There is a strong concordance between the two reports.
C2 adjective /ˈkreɪvən/

craven

Meaning
cowardly; lacking courage
Example
He was too craven to stand up for his beliefs.
C2 adjective /ˈmɔːrɪbʌnd/

Moribund

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

regatta

Meaning
A sporting event consisting of a series of boat or yacht races.
Example
The annual regatta attracted competitors from around the world.
C2 noun /ˈpælɪˌnoʊd/

palinode

Meaning
a poem or statement in which the writer retracts something said in an earlier work
Example
The poet wrote a palinode to apologize for his earlier harsh words.
C2 noun /ˈɡræn.juːl/

granule

Meaning
A small compact particle of a substance.
Example
Each granule of salt sparkled under the sunlight.
C2 adjective /nɪˈfɛəriəs/

nefarious

Meaning
Wicked, criminal, or morally bad.
Example
The police uncovered a nefarious plot to cheat investors.
C2 adjective /ˌpjuːsɪˈlænɪməs/

pusillanimous

Meaning
showing a lack of courage or determination; timid
Example
The pusillanimous leader avoided making tough decisions.
C2 noun /ˈskɪz.əm/ or /ˈsɪz.əm/

schism

Meaning
A division or split between strongly opposed parties, often in religion or organizations.
Example
The schism in the church led to the formation of two separate groups.
C2 noun /ˈrɛlɪkwɛri/

reliquary

Meaning
a container for holy relics
Example
The ancient reliquary was decorated with gold and precious stones.
C2 noun /ɪnˈdɛntʃər/

indenture

Meaning
A formal legal agreement, contract, or document, often relating to work or service.
Example
In the 18th century, many workers came under indenture to work overseas.
C2 verb /ˈɡɑːrbəl/

garble

Meaning
To reproduce a message in a confused, distorted, or unclear way.
Example
The poor phone connection garbled his words.
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 noun /ˈflætʃələns/

flatulence

Meaning
the accumulation of gas in the digestive system; excessive gas in the stomach or intestines
Example
Eating beans can sometimes cause flatulence.
C2 adjective /ˈflæs.ɪd/

Flaccid

Meaning
soft and limp; lacking firmness; drooping
Example
The plant's leaves became flaccid after days without water.
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 /ˈɡræn.tɔːr/

grantor

Meaning
A person or entity that makes a grant or transfers property or rights to another.
Example
The grantor transferred the property rights to the nonprofit organization.
C2 verb /dɪˈspɔɪl/

despoil

Meaning
To steal or violently remove valuable possessions from a place.
Example
The invaders despoiled the village during the war.
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 /ˈɡrænəri/

granary

Meaning
A storehouse for grain; a region that produces a large amount of grain
Example
The farmers stored their harvest in the village granary.
C2 noun ˈnjʊə.rəʊ ˌfiːd.bæk

neurofeedback

Meaning
A technique that uses real-time displays of brain activity to teach self-regulation of brain function.
Example
Neurofeedback enhances cognitive performance and relaxation.
C2 noun /ˈtrɪmnəs/

trimness

Meaning
the quality of being neat, orderly, or slender and well-proportioned
Example
Her room’s trimness reflected a habit of putting everything back in its place.
C2 verb /ˌmæn.juˈmɪt/

manumit

Meaning
to release from slavery or servitude; to set free
Example
The landowner decided to manumit his slaves.
C2 noun /dɪˈkæmərən/

decameron

Meaning
A collection of 100 tales written by Giovanni Boccaccio in the 14th century, told by a group of people over ten days.
Example
The Decameron is considered a masterpiece of classical Italian literature.
C2 verb /ˈhɛnˌpɛk/

henpeck

Meaning
To continually criticize, nag, or dominate (especially a husband).
Example
He felt henpecked by his overly controlling wife.
C2 adjective /ˈsiːkwənt/

sequent

Meaning
Following in order or as a result.
Example
The sequent events changed the course of history.
C2 adjective /ˈhæm ˌhændɪd/

ham-handed

Meaning
clumsy or inept in handling things or situations
Example
His ham-handed attempt to fix the computer made it worse.
C2 verb /rɪˈkænt/

recant

Meaning
to withdraw or renounce a statement or belief formally
Example
He recanted his previous statement in court.
C2 adjective /suːˈpɜːrnəl/

supernal

Meaning
Relating to the heavens; celestial or divine.
Example
The painting captured a supernal beauty that felt otherworldly.
C2 noun /ˈmætrɪˌsaɪd/

matricide

Meaning
The act of killing one's own mother.
Example
The crime of matricide shocked the entire town.
C2 noun /ˈlev.ɪ.ti/

Levity

Meaning
humor or frivolity, especially the treatment of a serious matter with humor or in a manner lacking due respect
Example
The levity in the courtroom was inappropriate.
C2 noun /ˌɪmprɪˈkeɪʃən/

imprecation

Meaning
A spoken curse or expression of strong condemnation.
Example
The angry crowd hurled imprecations at the corrupt official.
C2 adjective /ˈpaɪbɔːld/

piebald

Meaning
having irregular patches of two colors, especially black and white
Example
The farmer owns a piebald horse with black and white spots.
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 /ˈdɔːrmər/

dormer

Meaning
A window that projects vertically from a sloping roof.
Example
The old house had a dormer overlooking the garden.
C2 adjective /ˈnɪɡərdli/

niggardly

Meaning
unwilling to spend or give; stingy or miserly
Example
He was too niggardly to leave a decent tip.
C2 noun /əˈkʌmpənɪst/

accompanist

Meaning
A person who plays a musical instrument to support a singer or another musician.
Example
The pianist served as the accompanist for the singer during the concert.
C2 adjective ˌɪn.ɪ.fɪˈkeɪ.ʃəs

inefficacious

Meaning
Not producing any or the desired effect; ineffective.
Example
The treatment was inefficacious in curing the disease.
C2 noun /ˈθɝː.moʊ.klaɪn/

thermocline

Meaning
A layer in a body of water in which temperature changes rapidly with depth.
Example
The thermocline separates warm surface water from cold deep water.
C2 noun /ˌɪnkænˈdɛsəns/

incandescence

Meaning
the emission of light from a hot object; brilliance
Example
The incandescence of the candle filled the dark room.
C2 adjective /ˈhʌmdrʌm/

humdrum

Meaning
Lacking excitement or variety; dull and monotonous.
Example
She grew tired of the humdrum routine of office life.
C2 verb /ˈmɒlikɒdl/

mollycoddle

Meaning
To treat someone in an overprotective and indulgent way.
Example
Parents should avoid mollycoddling their children too much.
C2 noun /bjuːt/

butte

Meaning
an isolated hill with steep sides and a flat top, common in arid regions
Example
The travelers could see a tall butte rising in the desert.
C2 noun /ˌɪmpəˈtjuːəsəti/

impetuosity

Meaning
The quality of being rash or impulsive.
Example
His impetuosity often got him into trouble.
C2 noun /bleɪn/

Blain

Meaning
an inflammatory swelling or sore on the skin; a blister or pustule
Example
The doctor examined the blain on his arm.
C2 noun /ˌɡlæd.iˈoʊ.ləs/

Gladiolus

Meaning
A tall flowering plant with sword-shaped leaves and colorful spike-like flower clusters, popular in gardens and floral arrangements
Example
The gladiolus stood tall and elegant in the flower bed.
C2 adjective /ˌɪndɪˈsɜːrnəbl/

indiscernible

Meaning
Impossible or difficult to see, notice, or distinguish.
Example
The difference between the two shades was almost indiscernible.
C2 noun /ˌbækəˈneɪliə/

bacchanalia

Meaning
A Roman festival of Bacchus celebrated with dancing, drinking, and revelry; any occasion of wild and drunken revelry.
Example
The novel describes the party as a bacchanalia of excess and joy.
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 verb /fɪˈlɒs.ə.faɪz/

philosophize

Meaning
to think or talk about the fundamental nature of knowledge, reality, and existence
Example
He likes to philosophize about life and its meaning.
C2 noun /spʌndʒ ɡɔːrd/

Sponse gourd

Meaning
a fibrous gourd that becomes sponge-like when dried, used for cleaning and in cooking when young
Example
The sponge gourd can be eaten when young or dried to make natural scrubbers.