penumbra
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C2 noun /pəˈnʌmbrə/

penumbra

Meaning
a partially shaded area around the shadow of an object, especially during an eclipse
Example
The moon’s penumbra created a dim shadow over the Earth.
C2 noun /səˈnɛs.əns/

senescence

Meaning
The process of growing old or the condition of aging.
Example
The biologist studied senescence in plants to understand aging.
C2 noun /rɪˈpoʊst/

riposte

Meaning
a quick and clever reply to criticism or an insult
Example
Her sharp riposte left everyone in silence.
C2 verb /ˈstʌltɪfaɪ/

stultify

Meaning
to make someone or something appear foolish, or to hinder effectiveness and enthusiasm
Example
The repetitive tasks seemed to stultify the workers' creativity.
C2 noun /ˈproʊbɪti/

probity

Meaning
The quality of having strong moral principles; honesty and decency.
Example
The judge was admired for his integrity and probity.
C2 noun /laɪər/

lyre

Meaning
a stringed musical instrument of ancient Greece
Example
The musician played a melody on the lyre.
C2 noun /ɪnˈvɛstɪtʃər/

investiture

Meaning
the formal ceremony of conferring authority, rank, or office
Example
The king held an investiture ceremony for the new knight.
C2 noun /kwaɪˈiːtəs/

Quietus

Meaning
death or something that causes death; a final settlement
Example
The hero received his quietus from the villain's sword.
C2 adjective /djuːˈplɪsɪtəs/

duplicitous

Meaning
Deceitful; deliberately deceptive or dishonest.
Example
The politician was criticized for his duplicitous statements.
C2 verb /ˈfrɪzəl/

frizzle

Meaning
to fry something until it becomes crisp and curled, or to make a sizzling noise
Example
The bacon began to frizzle in the pan.
C2 adjective /dɪˈtɜːrmɪnət/

determinate

Meaning
having exact and definite limits or form
Example
The contract is for a determinate period of two years.
C2 adjective /ˈpɔːrtli/

portly

Meaning
Having a stout or somewhat fat body, often implying dignity or authority.
Example
The portly man entered the room with confidence.
C2 verb /ˈpɜː.fə.reɪt/

perforate

Meaning
to make a hole or holes through something
Example
The machine can perforate sheets of paper for easy tearing.
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 adjective /ˈwæɡ.ɪʃ/

waggish

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

brigand

Meaning
A member of a gang that ambushes and robs people in forests or mountains; a bandit.
Example
The travelers were attacked by brigands in the mountains.
C2 noun /ˈlæŋɡər/

languor

Meaning
A state of tiredness, inertia, or dreamy relaxation.
Example
The hot afternoon filled her with languor.
C2 noun /ˈæpəˌlɔːɡ/

apologue

Meaning
a short moral story or fable intended to teach a lesson
Example
The teacher used an old apologue to explain honesty to the children.
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 /ˈklɪpər/

clipper

Meaning
a tool used for cutting, or a fast sailing ship of the 19th century
Example
The barber used clippers to trim his hair.
C2 adjective /ˈstraɪ.eɪ.tɪd/

striated

Meaning
marked with thin lines, grooves, or stripes
Example
The muscle fibers appeared striated under the microscope.
C2 verb /ˈrævəl/

ravel

Meaning
to tangle or complicate; to untangle or unravel depending on context
Example
She began to ravel the loose threads of the sweater.
C2 verb /bɪˈθɪŋk/

bethink

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

undergird

Meaning
to provide support or foundation for; to strengthen
Example
Strong values undergird a healthy society.
C2 noun /ˈfrɛʃɪt/

freshet

Meaning
A sudden overflow of a stream or river caused by heavy rain or melting snow.
Example
After the storm, the river turned into a raging freshet.
C2 noun /ˌkɒnsæŋˈɡwɪnɪti/

consanguinity

Meaning
The fact of being descended from the same ancestor; blood relationship.
Example
The degree of consanguinity was important in inheritance laws.
C2 adjective /ˈɡɑːrbəld/

garbled

Meaning
Describes speech or text that is distorted or unclear.
Example
The radio broadcast was full of garbled messages.
C2 noun /ˌdiːnəʊˈteɪʃən/

denotation

Meaning
The literal or primary meaning of a word, in contrast to the feelings or ideas that the word suggests.
Example
The denotation of the word 'rose' is a type of flower.
C2 noun /əˈreɪ.bi.ən ˈdʒæz.mɪn/

Arabian Jasmine

Meaning
A fragrant white flower native to South and Southeast Asia, commonly used in perfumes and religious ceremonies
Example
The Arabian jasmine filled the garden with its sweet fragrance.
C2 verb /ɪˈmɛnd/

emend

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

hostelry

Meaning
An inn or lodging place, especially one for travelers.
Example
They stayed at a small hostelry near the mountains.
C2 verb /ˈvɛəriəˌɡeɪt/

variegate

Meaning
To diversify or mark with different colors or patterns.
Example
The artist used different shades to variegate the design.
C2 verb /əˈɡlɒməˌreɪt/

agglomerate

Meaning
To collect or form into a mass or group.
Example
The dust particles began to agglomerate into larger clusters.
C2 noun /ˈkriːdoʊ/

credo

Meaning
A statement of the beliefs or aims that guide someone's actions.
Example
Honesty has always been the central credo of his life.
C2 verb /ˈʌndjʊleɪt/

undulate

Meaning
To move with a smooth, wave-like motion.
Example
The snake undulated across the sand.
C2 adjective ɪˈnɛfəbl

ineffable

Meaning
Too great or extreme to be expressed or described in words.
Example
The beauty of the landscape was ineffable.
C2 adjective /ˈbiːstiəl/

bestial

Meaning
Relating to beasts; showing savagery, brutality, or lacking human sensibility.
Example
The prisoners were treated in a bestial manner.
C2 adjective /əˈprəʊ.bri.əs/

opprobrious

Meaning
Expressing strong criticism or scorn.
Example
He made opprobrious remarks about his opponent.
C2 noun /ɛˌspriː də ˈkɔːr/

esprit de corps

Meaning
A feeling of pride, fellowship, and loyalty shared by members of a group.
Example
The team's esprit de corps was evident in their cooperative effort.
C2 verb /ˈdʒæbər/

jabber

Meaning
To talk quickly and excitedly but with little sense.
Example
The children jabbered happily after the show.
C2 adjective /ˈɡlɑːbjələr/

globular

Meaning
Having the shape of a globe; spherical.
Example
The scientist studied the globular cluster of stars.
C2 verb /dɪsˈpɔːrt/

disport

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

vestigial

Meaning
Relating to a small, undeveloped remnant of something that was once much larger or more functional.
Example
Humans have a vestigial tailbone that no longer serves its original purpose.
C2 noun /ˈɪnroʊd/

inroad

Meaning
An advance or significant progress, often at the expense of something else.
Example
The company made significant inroads into the mobile market.
C2 noun /niːˈɒlədʒɪzəm/

neologism

Meaning
A newly coined word or expression.
Example
The internet has given rise to many neologisms like 'selfie' and 'hashtag'.
C2 noun /dɪˈkæmɪtər/

decameter

Meaning
A metric unit of length equal to ten meters.
Example
The field was measured in decameters for accuracy.
C2 noun /ɪnˈtɜːrstɪs/

interstice

Meaning
a small space that lies between things
Example
Light filtered through the narrow interstices of the wall.
C2 adjective /svelt/

svelte

Meaning
Attractively thin, graceful, and elegant in appearance or movement.
Example
She looked svelte in the elegant black dress.
C2 adjective /ˈdæpər/

dapper

Meaning
Neat, stylish, and well-dressed in appearance.
Example
He looked very dapper in his new suit.
C2 noun, verb /ˈpɑːrli/

parley

Meaning
a discussion between opposing sides, especially to negotiate terms
Example
The generals met to parley over the terms of surrender.
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 /kənˈdʒiːl/

congeal

Meaning
to become thick or solid, especially from cooling
Example
The soup began to congeal after being left on the table.
C2 adjective /ˈkɑːrpɪŋ/

carping

Meaning
continually complaining or finding fault in a petty way
Example
His carping attitude makes teamwork difficult.
C2 noun /ɪkˌspɒstjʊˈleɪʃən/

expostulation

Meaning
the act of expressing protest or disagreement
Example
His expostulation against the unfair rules was ignored.
C2 verb /ɪˈfeɪs/

efface

Meaning
To erase or wipe out something; to make oneself inconspicuous.
Example
Time had effaced the letters on the old gravestone.
C2 noun /wɪt/

whit

Meaning
a very small part or amount
Example
He doesn't care a whit about the outcome.
C2 noun ˈoʊʃən ˌstrætɪfɪˈkeɪʃən

ocean stratification

Meaning
The formation of layers in ocean water due to differences in density.
Example
Ocean stratification affects marine biodiversity.
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 noun /ˈlæki/

lackey

Meaning
a person who is overly willing to serve or obey someone else
Example
He treated his assistant like a mere lackey.
C2 adjective /ˌhɜːrkjʊˈliːən/

herculean

Meaning
Requiring great strength or effort; very difficult to perform.
Example
It was a herculean task to rebuild the city after the disaster.
C2 adjective /ɡrænˈdɪləkwənt/

grandiloquent

Meaning
Using lofty, pompous, or extravagant language to impress others.
Example
The politician’s grandiloquent speech failed to connect with ordinary people.
C2 adjective /bɪˈfɒɡd/

befogged

Meaning
Confused or clouded in mind; made unclear like being surrounded by fog.
Example
His mind felt befogged after the long and exhausting meeting.
C2 noun /ˈɡʌp.i fɪʃ/

Guppy fish

Meaning
a small colorful freshwater fish popular in aquariums, known for its vibrant colors and easy breeding
Example
The guppy fish is perfect for beginners who want to start an aquarium.
C2 noun /ˌrɛtroʊˈɡrɛʃən/

retrogression

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

paunchy

Meaning
Having a large or protruding belly.
Example
The paunchy man struggled to button his shirt.
C2 noun /ˈpɪnəs/

pinnace

Meaning
a small boat, often carried by a larger ship
Example
The sailors used a pinnace to reach the shore.
C2 verb /ˈvɛdʒɪteɪt/

vegetate

Meaning
to live in a dull, inactive, or unchallenging way, often with little physical or mental effort
Example
He spent his vacation vegetating on the couch in front of the TV.
C2 noun /ˌmɛtəmˌsaɪˈkoʊsɪs/

metempsychosis

Meaning
The supposed transmigration of the soul, especially its reincarnation after death.
Example
Ancient philosophers often debated the idea of metempsychosis.
C2 noun /ˌkɒntrəpəˈzɪʃən/

contraposition

Meaning
the act of placing two things in opposition for contrast or comparison
Example
The contraposition of the two theories highlighted their differences.
C2 adjective /ɪnˈɛksərəbl/

inexorable

Meaning
Impossible to stop or prevent; relentless.
Example
The inexorable rise of technology is changing every aspect of life.
C2 noun /ʃiːf/

sheaf

Meaning
a bundle of grain stalks laid lengthwise and tied together after reaping; a bundle of objects tied together
Example
The farmer carried a sheaf of wheat on his shoulder.
C2 noun /ˈhʌvəl/

hovel

Meaning
a small, poorly built, and dirty house
Example
The refugees lived in a makeshift hovel.
C2 adjective /ˌpɑːrsɪˈmoʊniəs/

parsimonious

Meaning
unwilling to spend money or use resources; stingy
Example
The company was too parsimonious to invest in better equipment.
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 noun /ˈmɪsəl/

missal

Meaning
a book containing the texts used in the Catholic Mass throughout the year
Example
The priest read from the missal during the ceremony.
C2 noun /ˈsɪlədʒɪzəm/

syllogism

Meaning
A form of reasoning in which a conclusion is drawn from two given or assumed premises.
Example
The philosopher explained the concept of syllogism using simple examples.
C2 noun /ˈmʌs.tərd liːf/

Mustard leaf

Meaning
green leafy vegetable from the mustard plant; edible leaves used in cooking
Example
We cooked mustard leaf with fish in a traditional Bengali curry.
C2 noun /ˈrɛkwiəm/

requiem

Meaning
A mass, music, or ceremony for the repose of the souls of the dead.
Example
The choir performed a requiem in memory of the late leader.
C2 noun /ˈvɪntnər/

vintner

Meaning
A person who makes or sells wine.
Example
The vintner explained the process of making red wine.
C2 verb /ˈæktʃueɪt/

actuate

Meaning
to put into action or motion; to motivate or activate
Example
The engineer actuated the machine with a simple switch.
C2 noun /ˈbɪbliəfaɪl/

bibliophile

Meaning
A person who loves or collects books.
Example
She is a true bibliophile who spends weekends at old bookstores.
C2 noun /ˈkɔːrnɪs/

cornice

Meaning
an ornamental molding around the wall of a room just below the ceiling
Example
The elegant cornice added a classical touch to the living room.
C2 noun /hɜːrs/

Hearse

Meaning
a vehicle for conveying the coffin at a funeral; a funeral car
Example
The black hearse slowly made its way to the cemetery, followed by a procession of mourners.
C2 adjective /ʌnˈtʃeɪst/

Unchaste

Meaning
not celibate; having engaged in sexual relations; lacking moral purity
Example
The conservative society considered her behavior unchaste and improper.
C2 adjective /ˈrɪz.ə.bəl/

risible

Meaning
so absurd or ridiculous that it deserves to be laughed at
Example
The idea of flying pigs is completely risible.
C2 noun /ˌɪndɛnˈteɪʃən/

indentation

Meaning
A space left at the beginning of a line of text; a notch or deep recess on a surface.
Example
The teacher asked the students to use proper indentation in their essays.
C2 noun /ˌkʌl.pəˈbɪl.ɪ.ti/

culpability

Meaning
responsibility for a fault or wrong; blameworthiness
Example
The jury considered his level of culpability in the crime.
C2 verb /ˈɒsɪfaɪ/

ossify

Meaning
to turn into bone or become rigid and inflexible
Example
With age, some tissues tend to ossify.
C2 adjective /dʒɛnˈtiːl/

genteel

Meaning
Polite, refined, or respectable, often in an affected or exaggerated way
Example
She spoke in a genteel manner that impressed the guests.
C2 noun /dʒɛˌstɪkjʊˈleɪʃən/

gesticulation

Meaning
a gesture, especially a dramatic one, used instead of speaking or to emphasize speech
Example
His speech was full of passionate gesticulations.
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 /ˌpænəˈdʒɪrɪk/

panegyric

Meaning
a formal speech or piece of writing in praise of someone or something
Example
The author wrote a panegyric on the bravery of the soldiers.
C2 noun /ˈɪəri/

eyry

Meaning
an alternative spelling of eyrie; a nest of a bird of prey
Example
The falcon guarded its eyry fiercely.
C2 noun /ˈnaɪəlɪst/

nihilist

Meaning
A person who rejects all religious and moral principles, often believing that life is meaningless.
Example
He was called a nihilist for rejecting all social norms.
C2 adjective /ɪnˈsuːpərəbl/

insuperable

Meaning
Impossible to overcome or surpass.
Example
The team faced insuperable challenges during the expedition.
C2 verb /ˈhɜːrtl/

hurtle

Meaning
To move or cause to move at great speed, often in a dangerous way.
Example
The car hurtled down the mountain road.
C2 adjective /ɪˈpɪstələri/

epistolary

Meaning
Related to the writing of letters; expressed in or through letters.
Example
The novel is written in an epistolary style, consisting of letters between characters.
C2 noun /ˈhækəlz/

hackles

Meaning
the hairs on the back of an animal’s neck that rise when it is angry or alarmed; figuratively, feelings of anger or resentment
Example
His rude comment raised my hackles.
C2 noun /hʌsk/

husk

Meaning
the dry outer covering of some fruits or seeds
Example
The corn husk was peeled away before cooking.
C2 adjective /ˈfædɪʃ/

faddish

Meaning
Following a temporary trend or fashion
Example
Wearing neon clothes was a faddish style in the 1980s.
C2 noun /ˌfəʊ.təʊ.sen.sɪˈtɪv.ɪ.ti/

photosensitivity

Meaning
Sensitivity to light, especially abnormal sensitivity that may cause discomfort or damage.
Example
Overrubbing can increase photosensitivity.
C2 noun /ˈkʌvən/

coven

Meaning
a group or gathering of witches
Example
The witches met secretly in a coven in the forest.
C2 adjective /ˌækwiˈɛsənt/

acquiescent

Meaning
ready to accept something without protest, or to do what someone else wants
Example
He gave an acquiescent smile and agreed to the plan.
C2 noun /prɪˈfɜːrmənt/

preferment

Meaning
promotion or advancement in rank, position, or office
Example
He hoped for preferment in the government office.
C2 noun /ˈkʌvi/

covey

Meaning
a small group of birds, especially partridges or quails
Example
A covey of quails flew across the field.
C2 noun /ˈpɜːrsənɪdʒ/

personage

Meaning
an important or famous person
Example
He is considered a great personage in the world of literature.
C2 noun /ˌpæliˈeɪʃən/

palliation

Meaning
relief of symptoms without curing the underlying disease or problem
Example
Palliation is often the focus of care for terminally ill patients.
C2 verb /ˈdɪðər/

dither

Meaning
to be indecisive or unable to make a decision
Example
He dithered for hours before choosing a restaurant.
C2 verb /ɛmˈbɔs/

emboss

Meaning
to decorate a surface with a raised design or pattern
Example
The invitation card was embossed with golden letters.
C2 noun /ˈɡɒz.lɪŋ/

gosling

Meaning
a young goose
Example
The mother goose carefully protected her goslings.
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 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 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 /ˌɔːrnɪˈθɑːlədʒi/

ornithology

Meaning
the scientific study of birds
Example
She pursued ornithology to understand the migration patterns of birds.
C2 noun /ˈʌŋkʃən/

unction

Meaning
The act of anointing as part of a religious or ceremonial ritual; excessive or insincere flattery.
Example
The priest performed the holy unction with solemnity.
C2 adjective /ˈkreɪvən/

craven

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

orate

Meaning
To speak in a formal, often pompous manner
Example
He began to orate at the ceremony.
C2 adjective /ˈmjuːtəbl/

mutable

Meaning
Capable of change or alteration.
Example
Human emotions are mutable and can shift rapidly.
C2 noun /ˈhjuːməs/

humus

Meaning
The dark, organic material in soil formed from decayed plants and animals.
Example
The gardener enriched the soil with humus to improve plant growth.
C2 adjective /ˈdʌktaɪl/

ductile

Meaning
capable of being stretched into a thin wire without breaking; easily influenced
Example
Gold is a very ductile metal.
C2 noun /ˈræʃənəlɪzəm/

rationalism

Meaning
a belief or theory that opinions and actions should be based on reason and knowledge rather than religious belief or emotion
Example
Rationalism emphasizes logic and reasoning over faith.