tremulous
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C2 adjective /ˈtrɛmjələs/

tremulous

Meaning
shaking or quivering slightly, often from nervousness or weakness
Example
Her voice was tremulous as she gave her speech.
C2 adjective /ˌævəˈrɪʃəs/

avaricious

Meaning
having or showing extreme greed for wealth or material gain
Example
The avaricious landlord increased the rent unfairly.
C2 adjective /ˈtjuːtɪlɑːr/

tutelar

Meaning
Serving as a guardian or protector.
Example
The tutelar spirit of the forest was believed to protect travelers.
C2 noun /ˈdɛrɪk/

derrick

Meaning
A framework or tower used for supporting a crane, especially for oil drilling or lifting heavy loads.
Example
The workers assembled a derrick at the oil drilling site.
C2 verb /kruːn/

croon

Meaning
to sing or hum in a soft, low, and gentle voice
Example
She crooned a lullaby to help the baby fall asleep.
C2 noun /tʃæf/

Chaff

Meaning
the husks of corn or other seed separated by winnowing; worthless things; light-hearted joking
Example
The farmer separated the wheat from the chaff using traditional methods.
C2 adjective /ˌɛkstrəˌdʒuːˈdɪʃəl/

extrajudicial

Meaning
done outside the authority of the legal system or judicial process
Example
The activists condemned the extrajudicial killings.
C2 noun /ˌdiːlɛkˈteɪʃən/

delectation

Meaning
great pleasure or delight
Example
She read the story aloud for the delectation of her friends.
C2 noun /ˈflæt.ər.ər/

Flatterer

Meaning
a person who lavishes praise, often insincerely and in order to gain advantage
Example
The king was surrounded by flatterers who only told him what he wanted to hear.
C2 noun /ɛnˈkoʊmiəm/

encomium

Meaning
A speech or piece of writing that praises someone or something highly.
Example
He delivered an encomium to his retiring teacher.
C2 noun /rʌmp/

Rump

Meaning
the hindquarters or buttocks; the lower back area
Example
The horse injured its rump during the fall.
C2 noun /proʊˈskrɪp.ʃən/

proscription

Meaning
the act of forbidding something, especially by law
Example
The proscription of child labor is an important human rights achievement.
C2 noun /ˈlɪmərɪk/

limerick

Meaning
a humorous five-line poem with a specific rhythm and rhyme scheme (AABBA).
Example
She recited a funny limerick at the party.
C2 noun/adjective /prɪˈsɪpɪtənt/

precipitant

Meaning
As a noun: a substance that causes a substance to be deposited from a solution; as an adjective: acting hastily or impulsively.
Example
The chemist added a precipitant to the solution to observe the reaction.
C2 adjective /ˈnaɪt.li/

Knightly

Meaning
having the characteristics of a knight; chivalrous; noble and brave
Example
He showed knightly courage in defending the innocent.
C2 noun /ɒkˈteɪvoʊ/

octavo

Meaning
A size of book page resulting from folding a sheet of paper into eight leaves (sixteen pages).
Example
The old library contained rare octavo editions of Shakespeare.
C2 noun /ˈrɛtɪnjuː/

retinue

Meaning
A group of attendants or followers accompanying an important person.
Example
The king entered the hall followed by his retinue.
C2 noun /ˌnɒvəˈlɛt/

novellette

Meaning
A short novel or long short story.
Example
The author published a novellette as a preview of her upcoming series.
C2 adjective /hɜːrˈbeɪʃəs/

herbaceous

Meaning
Relating to or resembling herbs; plants with soft, non-woody stems.
Example
The garden was filled with herbaceous plants that thrived in the summer.
C2 noun /weɪf/

Waif

Meaning
a homeless or abandoned child; a stray person or animal
Example
The charity helps waifs and strays find homes and families.
C2 verb /ˌɡeɪnˈseɪ/

gainsay

Meaning
To deny, contradict, or speak against.
Example
No one could gainsay the evidence presented in court.
C2 adjective /ˈɪl bred/

Ill-bred

Meaning
lacking good manners; rude; showing poor upbringing
Example
His ill-bred behavior shocked everyone at the dinner party.
C2 noun /rɪˈkɒɡnɪzəns/

recognizance

Meaning
A legal obligation or bond entered into before a court, especially to ensure future appearance.
Example
He was released on his own recognizance.
C2 adjective /dʒɪˈdʒuːn/

jejune

Meaning
Naive, simplistic, and superficial; also dull or uninteresting.
Example
The professor dismissed the essay as jejune and lacking depth.
C2 adjective /ɪˈmɒdɪst/

immodest

Meaning
lacking humility or decency; excessively proud or improper
Example
His immodest remarks offended the audience.
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 /sɪˈkweɪʃəs/

sequacious

Meaning
Lacking independence of thought; blindly following.
Example
The sequacious students never questioned their teacher's opinions.
C2 noun /ɛθˈnɒlədʒi/

ethnology

Meaning
the study of the characteristics of different peoples and the differences and relationships between them
Example
She specialized in ethnology to better understand cultural diversity.
C2 adjective /ˌɛkspəˈdɪʃəs/

expeditious

Meaning
Done with speed and efficiency.
Example
The expeditious delivery of the package was appreciated.
C2 noun /ˈkɒkskoʊm/

Cockscomb

Meaning
a tropical plant with bright, velvety flowers that resemble a rooster's comb
Example
The bright red cockscomb flowers added vibrant color to the garden bed.
C2 adjective /ˈæn.ə.daɪn/

anodyne

Meaning
Not likely to cause offense; bland or harmless. Also refers to something that relieves pain.
Example
The speaker’s anodyne remarks avoided controversy.
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 /ˈθiːɪzəm/

theism

Meaning
Belief in the existence of a god or gods, especially a creator who intervenes in the universe.
Example
Theism is central to many world religions.
C2 adjective /ɪmˈprɛɡnəbl̩/

impregnable

Meaning
Unable to be captured, broken into, or defeated.
Example
The fortress was considered impregnable by the enemy.
C2 verb /ˈbækˌslaɪd/

backslide

Meaning
To relapse into bad habits, undesirable practices, or moral decline.
Example
After months of progress, he began to backslide into old habits.
C2 adjective /bruːsk/ or /brʌsk/

brusque

Meaning
abrupt or blunt in manner or speech, often seen as rude
Example
His brusque reply ended the conversation.
C2 adjective /spɪk/

Spick

Meaning
extremely clean and neat; immaculate
Example
The house was spick and span after the cleaning.
C2 noun /ˈmeɪsə/

mesa

Meaning
An isolated flat-topped hill with steep sides, found in arid regions.
Example
The hikers stopped to admire the mesa rising above the desert floor.
C2 noun/verb /dɪsˈfeɪvər/

disfavor

Meaning
disapproval or dislike; to regard with disapproval
Example
The new policy fell into disfavor with the public.
C2 noun /ˈbreɪziər/

Brazier

Meaning
a worker in brass; a portable container for burning charcoal or coal
Example
The brazier crafted beautiful brass ornaments.
C2 noun /ˌɛpɪzəʊˈɒtɪk/

epizootic

Meaning
An outbreak of disease affecting many animals of one kind at the same time.
Example
The farmer feared an epizootic might wipe out his cattle.
C2 noun /ˌpɜː.spɪˈkæs.ɪ.ti/

perspicacity

Meaning
Sharp insight, keen understanding and discernment.
Example
Her perspicacity in business decisions led to success.
C2 adjective /ˌækrəˈmætɪk/

achromatic

Meaning
without color; free from color
Example
The designer chose an achromatic palette of black, white, and gray.
C2 adjective /ˌɛf.ɪˈkeɪ.ʃəs/

efficacious

Meaning
Successful in producing a desired or intended result; effective.
Example
The vaccine proved highly efficacious in preventing infections.
C2 verb /ˈrɔɪstər/

roister

Meaning
to revel noisily; to engage in loud, boisterous celebration
Example
The fans roistered in the streets after the victory.
C2 verb /dɪsˈmɛmbər/

dismember

Meaning
to cut or tear the limbs from a body; to divide into separate parts
Example
The king ordered his enemies to be dismembered.
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 /ˈɡælvəˌnɪzəm/

galvanism

Meaning
Electricity produced by chemical action, especially in a battery; the therapeutic use of electricity in medicine.
Example
Galvanism played a key role in early experiments with electricity.
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 adjective /ˌæntɪˈθɛtɪkəl/

antithetical

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

breezeway

Meaning
A roofed outdoor passage, often connecting two buildings.
Example
The breezeway connected the house to the garage.
C2 noun /ˌɪnədˈvɜːrtəns/

inadvertence

Meaning
Failure to pay attention; carelessness.
Example
The error happened through sheer inadvertence.
C2 verb /ɛmˈbleɪzən/

emblazon

Meaning
To decorate or display something in a noticeable or impressive way.
Example
The team's logo was emblazoned on their uniforms.
C2 verb /dɪsˈpɔːrt/

disport

Meaning
To amuse oneself in a lively or playful way.
Example
The children disported themselves in the garden.
C2 adjective/noun /ɪnˈkɑːrnədiːn/

incarnadine

Meaning
a bright crimson or pinkish-red color
Example
The sky turned incarnadine at sunset.
C2 adjective /ˌpjuːsɪˈlænɪməs/

pusillanimous

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

floe

Meaning
a large sheet of floating ice
Example
The polar bears rested on the ice floe.
C2 noun /ˈkæbəˌlɪzəm/

cabalism

Meaning
The doctrines, practices, or secretive dealings of a cabal.
Example
The historian wrote extensively about cabalism in the royal court.
C2 adjective /voʊˈsɪfərəs/

vociferous

Meaning
expressing feelings or opinions in a loud and forceful way
Example
The vociferous crowd demanded justice.
C2 noun /ˈplɔːdɪts/

plaudits

Meaning
expressions of praise or approval
Example
The scientist received plaudits from the international community.
C2 noun/verb /ˈsʌkər/

succor

Meaning
Assistance and support in times of hardship or distress.
Example
The charity provided succor to the flood victims.
C2 adjective /ˈkʌvətəs/

covetous

Meaning
having or showing a strong desire for someone else's possessions
Example
She gave him a covetous look when he showed his new watch.
C2 noun /troʊp/

trope

Meaning
A common or overused theme, idea, or device in literature, film, or speech.
Example
The film avoided the usual superhero tropes.
C2 adjective /ˌser.ɪˈməʊ.ni.əs/

ceremonious

Meaning
marked by formality, politeness, or strict observance of customs
Example
He gave her a ceremonious bow before entering the hall.
C2 verb /ɪnˈdɒktrɪˌneɪt/

indoctrinate

Meaning
To teach someone to fully accept a set of beliefs or ideas without question.
Example
The regime tried to indoctrinate the youth with propaganda.
C2 noun /ˈɔːrdʒi/

orgy

Meaning
A wild party involving excessive indulgence, especially of a sexual nature.
Example
The novel described a scandalous orgy in a wealthy mansion.
C2 verb /ˈmæk.jʊˌleɪt/

maculate

Meaning
To stain, spot, or pollute something.
Example
The white cloth was maculated by ink stains.
C2 verb /dɪˈræsɪˌneɪt/

deracinate

Meaning
To uproot something completely; to displace people from their native environment or culture.
Example
The conflict deracinated many families from their homeland.
C2 adjective /kwəʊˈtɪdiən/

quotidian

Meaning
Ordinary or everyday, especially when mundane.
Example
He focused on the quotidian details of family life.
C2 noun /əˈsɜːrbəti/

acerbity

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

defoliate

Meaning
to strip leaves from a tree, plant, or area, often using chemicals
Example
The farmers defoliated the fields before harvest.
C2 adjective /ˈluːpi/

loopy

Meaning
crazy, silly, or eccentric
Example
After working all night, he felt a little loopy.
C2 noun /ˈbeɪleɪ/

Bele

Meaning
a type of freshwater fish found in South Asian rivers, known for its distinctive appearance
Example
The bele fish is commonly caught in the rivers of Bangladesh.
C2 adjective /ɪmˈprɒvɪdənt/

improvident

Meaning
Not having or showing foresight; spending wastefully or without thought for the future.
Example
His improvident habits left him with no savings.
C2 noun /ˈpɒsi/

posse

Meaning
A group of people, often friends or a group organized to support or enforce the law.
Example
He arrived at the party with his posse of friends.
C2 noun /oʊd/

ode

Meaning
a lyrical poem, often expressing praise or strong emotions
Example
The poet wrote an ode to the beauty of nature.
C2 verb /ˈhɑːrkən/

hearken

Meaning
To listen attentively; to give heed.
Example
He would hearken to his mentor’s advice before making decisions.
C2 noun /ˈdɛswɪˌtuːd/

desuetude

Meaning
a state of disuse or inactivity
Example
The old law has fallen into desuetude.
C2 noun /tækˈsɒnəmɪst/

taxonomist

Meaning
A scientist who classifies organisms into groups based on their characteristics.
Example
The taxonomist discovered a new species of insect.
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 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 adjective əˈdrɔɪt

adroit

Meaning
clever or skillful in using the hands or mind.
Example
She is adroit at solving complex problems.
C2 noun /ˌbaɪ.oʊ.rɪˌmiː.diˈeɪ.ʃən/

bioremediation

Meaning
The use of living organisms to neutralize or remove environmental contaminants.
Example
Bioremediation helps remove toxins from polluted soil.
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 adjective ˈkoʊ.dʒənt

cogent

Meaning
Clear, logical, and convincing.
Example
His cogent argument convinced the jury.
C2 adjective /ˈkæloʊ/

callow

Meaning
Inexperienced and immature.
Example
The callow intern made several mistakes on his first day.
C2 adjective /ˈwɜːkmənˌlaɪk/

workmanlike

Meaning
Showing efficient, competent, and practical skill, but without flair or creativity.
Example
The carpenter delivered a workmanlike performance on the project.
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 adjective /ˈæfərənt/

afferent

Meaning
carrying impulses toward a central organ or part, especially toward the brain or spinal cord
Example
Afferent nerves carry signals from the body to the brain.
C2 adverb /ˈbruːskli/ or /ˈbrʌskli/

brusquely

Meaning
in a blunt, abrupt, or rude manner
Example
She brusquely dismissed the suggestion.
C2 noun /ˈmɛzməˌrɪzəm/

mesmerism

Meaning
A state of fascination or hypnotism.
Example
The magician held the audience in a state of mesmerism.
C2 adjective /ˈɪnmoʊst/

inmost

Meaning
Situated at the very heart or deepest part; most private or secret.
Example
She revealed her inmost thoughts to her closest friend.
C2 noun /ˈlɪtəni/

litany

Meaning
a long, repetitive, or tedious account or list; originally a form of prayer
Example
The politician gave a litany of promises during the campaign.
C2 verb /ˈdʒɛsteɪt/

gestate

Meaning
to carry and develop in the womb during pregnancy; to develop an idea over a period of time
Example
The mother whale gestates her calf for over a year.
C2 noun /ˈɡændər/

Gander

Meaning
male goose
Example
The gander protected his family from the approaching dog.
C2 verb /ˈstɪp.əl/

stipple

Meaning
to cover a surface with numerous small dots or specks, often in drawing or painting
Example
The artist stippled the canvas to create a textured effect.
C2 adjective /ʌnˈɡeɪnli/

ungainly

Meaning
Awkward, clumsy, or lacking grace in movement or appearance.
Example
The tall boy moved in an ungainly manner.
C2 noun /ˌdʒiː.niˈæl.ə.ti/

geniality

Meaning
the quality of being friendly and cheerful
Example
His geniality made him popular among his colleagues.
C2 noun /ˈvaɪsrɔɪ/

viceroy

Meaning
a ruler exercising authority on behalf of a sovereign in a colony or province
Example
The viceroy governed the colony in the king's name.
C2 noun /ˈpriːskrɪpt/

prescript

Meaning
An authoritative rule or direction; something laid down as a command.
Example
The prescript of the organization required strict punctuality.
C2 adjective /saɪˈdɪəriəl/

sidereal

Meaning
Relating to the stars or constellations; measured relative to the stars.
Example
Astronomers use sidereal time to track the positions of stars.
C2 noun /ˈʌm.brə/

Umbra

Meaning
the fully shaded inner region of a shadow cast by an opaque object; the dark center of a sunspot
Example
During the eclipse, we stood in the moon's umbra.
C2 adjective /ˈʌndjʊləs/

undulous

Meaning
Having a wavy surface or form.
Example
The artist painted the undulous sea at sunset.
C2 noun ˈɛn.ɡræm

Engram

Meaning
Physical signs or patterns in the brain for memory storage and retrieval
Example
Scientists study engrams to understand how memories are stored.
C2 noun /klaɪm/

clime

Meaning
A region defined by its climate.
Example
He traveled to warmer climes during the winter.
C2 noun /ˈæmɪti/

amity

Meaning
A friendly relationship between people or countries.
Example
The treaty helped maintain amity between the neighboring nations.
C2 adjective /ˌhɪstriˈɒnɪk/

histrionic

Meaning
Overly dramatic or theatrical in behavior or style.
Example
Her histrionic reaction to the small problem surprised everyone.
C2 adjective /sɛnˈtrɪpɪtəl/

centripetal

Meaning
Moving or directed toward a center.
Example
Centripetal force keeps the planets in orbit around the sun.
C2 adjective /ˌɪlˈneɪ.tʃəd/

ill-natured

Meaning
Having a bad or unpleasant character; unkind or malicious.
Example
He made an ill-natured remark about his colleague.
C2 adjective /ˈhiːðənɪʃ/

heathenish

Meaning
Lacking culture or religion; barbaric or uncivilized.
Example
They considered the ancient tribe’s rituals heathenish.
C2 noun /ˈkeɪsiːn/

Casein

Meaning
the main protein found in milk and cheese, used in food production and supplements
Example
Casein protein powder is popular among athletes for muscle recovery.
C2 adjective /ɪmˈpæsɪbəl/

impassible

Meaning
Incapable of suffering or feeling pain (used mainly in theological or philosophical contexts).
Example
Some philosophers argue that God is impassible and cannot experience human emotions.
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 noun /ˈʃɑːrlətən/

charlatan

Meaning
a person who pretends to have knowledge or skills that they do not really possess; a fraud
Example
The so-called healer was exposed as a charlatan.
C2 adjective /prɪˈskrɪptɪbəl/

prescriptible

Meaning
Capable of being prescribed or laid down as a rule or directive.
Example
Certain regulations are prescriptible under the law.
C2 verb /ˈvɪvɪfaɪ/

vivify

Meaning
to give life or energy to something; to animate or enliven
Example
The teacher’s enthusiasm helped vivify the boring lecture.
C2 noun /ˌsuː.pɚˈfluː.ə.t̬i/

superfluity

Meaning
An excessive amount of something; more than what is needed.
Example
The room was filled with a superfluity of decorations.
C2 verb /ɪˈluːmɪn/

illumine

Meaning
to light up or make clear
Example
The rising sun illumined the mountain peaks.
C2 noun /ˌkæt ə ˈnaɪn ˌteɪlz/

cat-o-nine-tails

Meaning
A whip with nine knotted cords, historically used for punishment.
Example
The sailor feared the cat-o-nine-tails more than the storm at sea.
C2 noun /ˌɪkθiˈɒlədʒi/

ichthyology

Meaning
The branch of zoology that deals with fish.
Example
He pursued a degree in ichthyology at the university.
C2 adjective /kwɪkˈsɑː.t̬ɪk/

quixotic

Meaning
Extremely idealistic, unrealistic, and impractical.
Example
His quixotic dreams often led to disappointment.