orthogonal
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C2 adjective /ɔːrˈθɑːɡənl/

orthogonal

Meaning
at right angles; independent or unrelated
Example
In mathematics, two vectors are orthogonal if their dot product is zero.
C2 verb /ɡɔːk/

gawk

Meaning
To stare openly and rudely.
Example
Tourists gawked at the celebrity walking down the street.
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 noun /tɑːrn/

tarn

Meaning
A small mountain lake or pool.
Example
We camped near a tranquil tarn in the highlands.
C2 noun /ɒmˈnɪʃəns/

omniscience

Meaning
the state of knowing everything
Example
The novel's narrator has an air of omniscience, revealing every character's thoughts.
C2 noun /əˈnɔɪnt.mənt/

anointment

Meaning
The act of anointing, usually with oil, as part of a ritual or ceremony.
Example
The anointment of the new leader was a sacred ritual.
C2 adjective /ˈdɔːrsəl/

dorsal

Meaning
Relating to the back or upper side of an animal or body part.
Example
Sharks have a prominent dorsal fin.
C2 noun ˈhɑːrbərɪdʒ

harborage

Meaning
A place of shelter or refuge for pests or animals.
Example
Pests need a harborage site to survive and breed.
C2 adjective /ˌæm.bɪˈdɛk.strəs/

ambidextrous

Meaning
Able to use both hands equally well, or versatile in abilities.
Example
Being ambidextrous can be beneficial in sports.
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 adjective /ˌnɒnkəˈmɪtl̩/

noncommittal

Meaning
Not expressing or showing a clear opinion, decision, or commitment.
Example
She gave a noncommittal reply when asked about her future plans.
C2 verb /ˈræm.ɪ.faɪ/

ramify

Meaning
to spread or branch out into divisions or subdivisions.
Example
The river ramifies into several smaller streams.
C2 noun /bəˈnæləti/

banality

Meaning
The condition of being unoriginal, boring, or obvious; trite remark or quality.
Example
The speech was criticized for its banality and lack of originality.
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 /sɪlf/

sylph

Meaning
A mythical spirit of the air; also refers to a slender, graceful woman.
Example
She moved across the stage like a sylph, light and graceful.
C2 noun /dʒuːt liːf/

Jute leaf

Meaning
the edible leaves of the jute plant, commonly eaten as a leafy green vegetable
Example
Jute leaf is rich in vitamins and minerals and is often cooked with lentils in Bengali cuisine.
C2 verb ˈɑːb.fə.skeɪt

obfuscate

Meaning
Render obscure, unclear, or unintelligible.
Example
Politicians often obfuscate facts to mislead people.
C2 noun /ˈbɪvuˌæk/

bivouac

Meaning
a temporary camp without tents or cover, usually used by soldiers or mountaineers
Example
The climbers set up a bivouac on the mountainside.
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 noun /maɪˈkrɑː.skə.pi/

microscopy

Meaning
The use of a microscope to observe small objects or organisms.
Example
Microscopy revealed the structure of the cells.
C2 verb /ˈkɒd.l̩/

coddle

Meaning
to treat someone with excessive care or kindness, often in a way that is overprotective
Example
Parents should support their children without coddling them.
C2 adjective /ˈmɪnətɔːri/

minatory

Meaning
Expressing a threat; menacing.
Example
The criminal gave the witness a minatory look.
C2 noun /laʊs/

Louse

Meaning
a small insect that lives on the hair or skin of people or animals
Example
The child had a louse in his hair.
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 adjective /kɔːrˈpɔːriəl/

corporeal

Meaning
relating to the physical body; material or tangible
Example
Ghosts are often described as having no corporeal form.
C2 noun /ˌɑːrbəˈriːtəm/

arboretum

Meaning
a place where trees, shrubs, and plants are grown for scientific study or public display
Example
We visited the city’s arboretum to learn about exotic trees.
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 noun /ˈɡændər/

Gander

Meaning
male goose
Example
The gander protected his family from the approaching dog.
C2 noun /doʊlt/

dolt

Meaning
A stupid or slow-witted person.
Example
Only a dolt would believe such a story.
C2 noun /əˈsɜːrbəti/

acerbity

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

despond

Meaning
to lose confidence or hope; to become dejected
Example
After repeated failures, he began to despond.
C2 noun /tiːˈtoʊtəlɪzəm/

teetotalism

Meaning
the practice or principle of abstaining completely from alcoholic drinks
Example
He practiced teetotalism throughout his life.
C2 verb /dɪˈfreɪ/

defray

Meaning
to provide money to pay the costs of something
Example
The grant will help defray the cost of education.
C2 noun /ˌmæləˈdɪkʃən/

Malediction

Meaning
A magical word used to invoke a curse; an evil spell
Example
The witch uttered a terrible malediction upon her enemies.
C2 adjective /səˈleɪʃəs/

salacious

Meaning
Having or conveying undue or inappropriate sexual interest.
Example
The tabloid published a salacious story about the celebrity.
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 /ˈslæp.dæʃ/

slapdash

Meaning
done too quickly and carelessly; hasty and careless
Example
The report was written in a slapdash manner, full of errors.
C2 adjective /ˈhaɪˌbraʊ/

highbrow

Meaning
intellectually superior or cultured; often describing art, literature, or activities appealing to intellectual tastes
Example
The museum is known for its highbrow exhibitions.
C2 noun /ˈmɒnəɡræm/

monogram

Meaning
A design consisting of two or more letters, typically a person's initials, combined or interwoven.
Example
The towel was embroidered with her monogram.
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 /ˈneɪtl/

natal

Meaning
Relating to birth or the place of birth.
Example
She returned to her natal village after many years.
C2 adjective /ˈdaʊti/

doughty

Meaning
brave, valiant, courageous
Example
The doughty soldier never backed down from a challenge.
C2 verb /ˌoʊvərˈstraɪd/

overstride

Meaning
To stride over something; to step across with long steps.
Example
He managed to overstride the narrow stream with ease.
C2 adjective /ˈfuːlˌhɑːrdi/

foolhardy

Meaning
Recklessly bold or rash; taking foolish risks.
Example
It was foolhardy of him to climb the mountain without proper gear.
C2 adjective /ˌɛnkəˈmiːæstɪk/

encomiastic

Meaning
Expressing praise; laudatory.
Example
The book was filled with encomiastic remarks about the author.
C2 noun /ˈkɒŋ.kɔː.dæt/

concordat

Meaning
An agreement or treaty, especially between the Vatican and a secular government.
Example
The concordat established the rights of the church within the country.
C2 adjective /blɑːˈzeɪ/

blase

Meaning
unimpressed or indifferent to something because it has been experienced so often before
Example
After years of luxury travel, she felt blase about another trip to Paris.
C2 noun /ænˈtɪstrəfi/

antistrophe

Meaning
A rhetorical device in which a word or phrase is repeated at the end of successive clauses; in Greek choral poetry, the part of the ode sung by the chorus in return movement.
Example
The poet used antistrophe to emphasize the repeated phrase.
C2 noun /ˈnjuː.trɪ.mənt/

nutriment

Meaning
Something that nourishes; sustenance or food.
Example
The soil provides nutriment to the plants.
C2 noun /ˈæk.rɪ.moʊ.ni/

acrimony

Meaning
Bitterness and anger, especially in speech or behavior.
Example
The divorce was filled with acrimony and disputes.
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 /aɪˈdɒləˌtraɪz/

idolatrize

Meaning
To worship idols; to regard with excessive devotion or admiration.
Example
They began to idolatrize the statue as a deity.
C2 noun /drʌdʒ/

drudge

Meaning
A person made to do hard, menial, or dull work.
Example
He felt like a drudge, stuck in repetitive tasks all day.
C2 adjective /ˈluːsənt/

lucent

Meaning
shining or glowing with light
Example
The lucent stars brightened the night sky.
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 noun /ˈsɪŋkrəˌnɪzəm/

synchronism

Meaning
The simultaneous occurrence of events or actions.
Example
The synchronism of the dancers' movements amazed the audience.
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 adjective /ˈlæm.ən.tə.bəl/

lamentable

Meaning
deserving to be criticized or regretted; unfortunate
Example
The team’s lamentable performance disappointed their fans.
C2 adjective /ˈhoʊm.spʌn/

homespun

Meaning
Simple and unsophisticated; made at home rather than in a factory.
Example
She wore a homespun dress to the village festival.
C2 noun /ˈbɜːrɡər/

burgher

Meaning
A citizen of a town, typically a member of the wealthy middle class.
Example
The burgher was respected as a prosperous merchant in the city.
C2 verb /rɛnd/

rend

Meaning
to tear something apart violently or forcefully
Example
The explosion rent the air with a deafening noise.
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 adjective /ˈpɜːrviəs/

pervious

Meaning
Allowing water, air, or other substances to pass through; permeable.
Example
The soil here is pervious to rainwater.
C2 noun /ˌɪntərˈrɛɡnəm/

interregnum

Meaning
A period between rulers or governments when normal leadership is suspended.
Example
The country faced instability during the interregnum after the king’s death.
C2 noun /ˈɔː.rɪ.fɪs/

orifice

Meaning
an opening or hole, especially in the body or a device
Example
The medicine was applied through a small orifice in the device.
C2 adjective /ˌsɛm.iˈsɪv.ə.laɪzd/

semicivilized

Meaning
Partially civilized; having some aspects of civilization but not fully developed.
Example
The tribe was described as semicivilized by early explorers.
C2 noun /ˈæntɪˌtʃeɪmbər/

antechamber

Meaning
a small room serving as an entry to a larger one
Example
The guests waited in the antechamber before being admitted to the hall.
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 adjective /fəˈlɪsɪtəs/

felicitous

Meaning
well-chosen, appropriate, or pleasing; marked by good fortune or happiness
Example
She made a felicitous remark that lightened the mood.
C2 noun /ˈtʃaɪ.nə roʊz/

China-rose

Meaning
a tropical flowering plant with large, showy flowers in various colors
Example
The bright red China-rose flowers decorated the entrance of the house.
C2 noun /nɪmf/

Nymph

Meaning
a mythological spirit of nature; a beautiful young woman in classical mythology
Example
The water nymph appeared by the moonlit lake.
C2 noun /ɪˈlɪksər/

elixir

Meaning
A magical or medicinal potion believed to cure illnesses or grant immortality.
Example
The old legend spoke of an elixir that could grant eternal youth.
C2 verb /aɪˈtɪnəˌreɪt/

itinerate

Meaning
To travel from place to place, usually for the purpose of work or preaching.
Example
The missionary itinerated throughout the region to spread the message.
C2 /laɪð/

lithe

Meaning
thin, supple, and graceful in movement
Example
The lithe dancer captivated the audience with her graceful spins.
C2 adjective /ˌɪntərˈniːsaɪn/

internecine

Meaning
Relating to conflict within a group, often causing mutual destruction.
Example
The internecine conflict weakened the organization from within.
C2 noun /məˈlɪŋɡərər/

malingerer

Meaning
a person who pretends to be sick to avoid duty or work
Example
The manager suspected that John was a malingerer.
C2 noun /ɪˈfʌldʒəns/

effulgence

Meaning
Brilliant radiance or shining brightness.
Example
The effulgence of the sunrise lit up the entire valley.
C2 adjective /ˈpʌkɪʃ/

puckish

Meaning
playfully mischievous
Example
The child gave a puckish grin before hiding the toy.
C2 noun /ˈpraɪəri/

priory

Meaning
a small monastery or convent governed by a prior or prioress
Example
The old priory was converted into a museum.
C2 noun /ˈhaɪərlɪŋ/

hireling

Meaning
A person who works for payment only, often with little loyalty or principle.
Example
The mercenary was dismissed as just a hireling with no real loyalty.
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 adjective /ˌpluːˈpɜːrfɪkt/

pluperfect

Meaning
a verb tense expressing an action completed before another past action
Example
By the time she arrived, he had finished his homework, showing the pluperfect tense.
C2 noun /ˌæpəˈleɪʃən/

appellation

Meaning
a name or title
Example
The city has earned the appellation 'The Big Apple'.
C2 noun /ˈskɔːrpiən fɪʃ/

Scorpion fish

Meaning
a type of fish with venomous spines that belongs to the family Scorpaenidae
Example
The scorpion fish has dangerous spines that can inject venom.
C2 verb /bɪˈdaɪzən/

bedizen

Meaning
to dress up or decorate in a showy or tasteless way
Example
She was bedizened with cheap jewelry.
C2 noun /ˈɑːr.bɪ.trɑːʒ/

arbitrage

Meaning
The simultaneous buying and selling of securities in different markets to take advantage of differing prices.
Example
Investors use arbitrage to make profits in global markets.
C2 noun /ˈskʌl.i.ən/

scullion

Meaning
a servant assigned the most menial kitchen tasks
Example
In medieval times, a scullion was responsible for cleaning pots and pans.
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 noun /maɪˈnjuːʃə/

minutia

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

oration

Meaning
A formal speech, especially one given on a ceremonial occasion
Example
The president delivered an inspiring oration.
C2 verb /bɪˈsmɪər/

besmear

Meaning
to smear or cover with a sticky or dirty substance; to soil
Example
His clothes were besmeared with mud.
C2 noun /ˈprɛləsi/

prelacy

Meaning
The office, dignity, or system of church government by prelates.
Example
The medieval church was dominated by prelacy and its traditions.
C2 noun /ˈɛpɪɡræm/

epigram

Meaning
A short, witty saying or poem that expresses an idea in a clever way.
Example
Oscar Wilde was famous for his sharp epigrams.
C2 noun /ˈsoʊbrɪˌkeɪ/

sobriquet

Meaning
a person's nickname or descriptive name
Example
The famous leader was known by the sobriquet 'The Iron Lady'.
C2 noun /ˌɛntəˈmɒlədʒi/

entomology

Meaning
The scientific study of insects.
Example
She studied entomology to understand the behavior of bees.
C2 noun /ˈmɪlɪt/

millet

Meaning
a small-seeded grass cultivated as a cereal crop
Example
Millet is often used as food in rural areas.
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 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 verb /ˈɒsɪfaɪ/

ossify

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

evanescent

Meaning
Quickly fading or disappearing; lasting for only a very short time.
Example
The beauty of the sunset was evanescent, fading within minutes.
C2 adjective /əbˈstrɛpərəs/

obstreperous

Meaning
Noisy and difficult to control.
Example
The obstreperous students disrupted the class.
C2 adjective /ˌsuːpərˈnuːmərɛri/

supernumerary

Meaning
Exceeding the usual number; extra or unnecessary.
Example
The play included several supernumerary actors to fill the background scenes.
C2 adjective /ˈdjuːtiəs/

duteous

Meaning
dutiful; obedient and respectful
Example
The duteous child always followed her parents’ instructions.
C2 verb /θrɛʃ/

thresh

Meaning
to separate grain from the plant by beating or by using a machine
Example
Farmers used machines to thresh the wheat after harvest.
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 /ˈɛmbəˌlɪzəm/

embolism

Meaning
the sudden blockage of a blood vessel by a clot or other foreign matter
Example
The patient suffered a fatal pulmonary embolism.
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 verb /ˈlaɪ.ə.naɪz/

lionize

Meaning
to treat someone as a celebrity or give a lot of public attention
Example
The press began to lionize the young scientist after his discovery.
C2 verb /ˈʌndjʊleɪt/

undulate

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

behoove

Meaning
to be necessary, proper, or appropriate for someone to do
Example
It would behoove you to study before the exam.
C2 verb /dɔːb/

daub

Meaning
to spread a thick or sticky substance carelessly on a surface
Example
The children daubed paint all over the walls.
C2 verb /poʊˈtɛnʃiˌeɪt/

potentiate

Meaning
To increase the power, effect, or likelihood of something.
Example
Caffeine can potentiate the effects of some medicines.
C2 adjective /ˈpʌdʒi/

pudgy

Meaning
slightly fat or chubby in a way that is often cute
Example
The baby had pudgy cheeks that everyone adored.
C2 verb /ɪmˈbɪtər/

embitter

Meaning
To make someone resentful or angry; to cause bitterness.
Example
The unfair treatment embittered the employees.
C2 noun /ˌɡæskəˈneɪd/

gasconade

Meaning
Extravagant boasting or bragging.
Example
His endless gasconade made him unpopular among his peers.
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 /ˈflɪpənsi/

flippancy

Meaning
lack of seriousness; showing a disrespectful or trivial attitude
Example
His flippancy during the meeting offended his colleagues.
C2 noun /priːˈɛmɪnəns/

preeminence

Meaning
The fact of surpassing all others; superiority.
Example
The university has gained preeminence in medical research.
C2 noun /ɪnˈsuːsiəns/

insouciance

Meaning
Casual lack of concern; indifference.
Example
She carried herself with an air of insouciance, unbothered by the challenges ahead.
C2 verb /dɪˈbɔːtʃ/

debauch

Meaning
to corrupt morally; to lead into excessive indulgence in sensual pleasures
Example
The novel shows how wealth can debauch a person's character.