actuate
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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 /ˌlɛksɪˈkɒɡrəfi/

lexicography

Meaning
The art or practice of compiling dictionaries.
Example
Lexicography requires both linguistic and cultural knowledge.
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 noun /ˌɪkθiˈɒlədʒɪst/

ichthyologist

Meaning
A scientist who studies fish.
Example
The ichthyologist discovered a new species of fish in the river.
C2 adjective /ˈɑːrtləs/

artless

Meaning
Without deception or pretentiousness; natural and simple.
Example
Her artless smile made everyone feel at ease.
C2 verb /bɪˈdɔːb/

bedaub

Meaning
to smear or cover with a sticky or dirty substance
Example
The children bedaubed the wall with paint.
C2 verb /ɪˈluːmɪn/

illumine

Meaning
to light up or make clear
Example
The rising sun illumined the mountain peaks.
C2 verb /ˈprætəl/

prattle

Meaning
to talk at length in a foolish or inconsequential way
Example
The children would prattle on about their games.
C2 adjective /ˌhɑːrdˈbɪtn̩/

hard-bitten

Meaning
tough and experienced, not easily affected by emotions or hardship
Example
The hard-bitten detective showed no sign of surprise at the crime scene.
C2 noun /ˈsɒfɪst/

sophist

Meaning
a person who uses clever but misleading arguments
Example
He was dismissed as a sophist who twisted facts to win debates.
C2 noun /ˌpɛntəˈhiːdrən/

pentahedron

Meaning
A solid geometric figure with five faces.
Example
In geometry class, the teacher explained the structure of a pentahedron.
C2 noun /ˈfʌstɪən/

fustian

Meaning
pompous or pretentious speech or writing; originally a type of thick cloth
Example
The politician's speech was filled with fustian and empty promises.
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 noun /ræŋˈɡuːn ˈkriːpər/

Rangoon creeper

Meaning
A climbing vine with fragrant flowers that change color from white to pink to red
Example
The Rangoon creeper covered the entire fence with its sweet-smelling flowers.
C2 adjective /ˌæn.θrə.pəˈdʒen.ɪk/

anthropogenic

Meaning
Originating in human activity; caused by humans.
Example
Climate change is largely due to anthropogenic activities.
C2 noun /dʒeɪp/

jape

Meaning
A practical joke or humorous remark.
Example
He enjoyed a harmless jape with his friends.
C2 verb /ɪnˈsaɪfər/

encipher

Meaning
to convert a message into code or cipher
Example
The agent enciphered the secret message before sending it.
C2 adjective /ɪˈnɪmɪkəl/

inimical

Meaning
tending to obstruct or harm; unfriendly or hostile
Example
The policy was inimical to the country's economic growth.
C2 verb /ˈdʒɪb.ər/

gibber

Meaning
To speak rapidly and unintelligibly, typically through fear or shock.
Example
The frightened man began to gibber when he saw the ghost.
C2 noun ˈɔː.tɑː.ki

autarky

Meaning
Economic independence or self-sufficiency; a policy of establishing a self-sufficient national economy.
Example
Some nations aim for autarky to reduce reliance on imports.
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 noun /əˌkædəˈmɪʃən/

academician

Meaning
a member of an academy; a scholar or expert in a field of study
Example
The academicians gathered to discuss the future of education.
C2 adjective /vaɪˈkɛəriəs/

vicarious

Meaning
experienced through the feelings or actions of another person
Example
She felt vicarious excitement watching her son win the award.
C2 adjective /ˌdɒktrɪˈnɛər/

doctrinaire

Meaning
stubbornly devoted to a theory or doctrine without regard to practical considerations
Example
His doctrinaire approach to politics alienated many supporters.
C2 verb /bɪˈfɪt/

befit

Meaning
to be suitable for; to be appropriate to
Example
Formal attire befits the seriousness of the occasion.
C2 noun /ɪksˈtʃɛkər/

exchequer

Meaning
The treasury of a state or country.
Example
The government announced new measures to improve the exchequer.
C2 noun /ˌæv.oʊˈkeɪ.ʃən/

avocation

Meaning
a hobby or minor occupation pursued in addition to one's main work
Example
Painting is his avocation after office hours.
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 /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 /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 /ɔːrˈθɑːɡrəfi/

orthography

Meaning
The conventional spelling system of a language.
Example
English orthography can be confusing for learners.
C2 noun /ˈvaɪənd/

viand

Meaning
an item of food, especially a delicacy
Example
The banquet was filled with rich viands and wines.
C2 adjective /ˌsuːpərˈæn.ju.eɪ.tɪd/

superannuated

Meaning
old and no longer useful or valid; retired due to age
Example
The factory was filled with superannuated machines that slowed production.
C2 verb /pɔːrˈtɛnd/

portend

Meaning
To be a sign or warning that something, especially something bad, is going to happen.
Example
Dark clouds portend a storm.
C2 noun /lænˈtɑː.nə/

Lantana

Meaning
a tropical flowering plant with clusters of small colorful flowers
Example
The lantana flowers attract butterflies to the garden.
C2 adjective /ˈærənt/

arrant

Meaning
complete or utter (used negatively, e.g., 'arrant nonsense')
Example
His excuse was arrant nonsense.
C2 noun /ˈɡɑːrɡɔɪl/

gargoyle

Meaning
A carved stone figure, often of a grotesque creature, on a building, typically used as a spout to carry water away.
Example
The ancient cathedral had gargoyles on every corner.
C2 adjective /ˌɪnɪˈsɛnʃəl/

inessential

Meaning
not necessary or important; not essential
Example
The report removes all inessential details to stay focused.
C2 noun /ˌprɛsiˈɒsɪti/

preciosity

Meaning
Excessive refinement or affected elegance in language, style, or behavior.
Example
The author's preciosity made the novel difficult to read for some audiences.
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 verb /mʌlkt/

mulct

Meaning
to punish by a fine or to defraud someone of money
Example
The corrupt official was mulcted for his misconduct.
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 /ɪˈmjʊər/

immure

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

doughty

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

half-baked

Meaning
poorly thought out or badly planned
Example
The manager quickly rejected his half-baked proposal.
C2 adjective /ɑːlˈfæktəri/

olfactory

Meaning
Relating to the sense of smell.
Example
The perfume activated her olfactory nerves immediately.
C2 noun /ˈfræŋkɪnsɛns/

frankincense

Meaning
An aromatic gum resin used in incense and perfumes, often in religious ceremonies.
Example
The temple was filled with the sweet smell of burning frankincense.
C2 noun /ˈdɛvɪlri/

devilry

Meaning
Wicked or cruel behavior; mischievous actions.
Example
The children were full of devilry on Halloween night.
C2 noun /sʌnd raɪs/

Sunned rice

Meaning
Rice that has been dried in the sun; parched rice
Example
The farmers spread the sunned rice on mats to dry completely.
C2 verb /ˌdɪskəmˈpoʊz/

discompose

Meaning
To disturb the order or calmness of something or someone.
Example
The unexpected question seemed to discompose her.
C2 noun /vɛkˈseɪʃən/

vexation

Meaning
the state of being annoyed, frustrated, or worried
Example
She could not hide her vexation after the repeated delays.
C2 adjective /ˌoʊpəˈlɛsənt/

opalescent

Meaning
showing or reflecting a milky, iridescent light like an opal
Example
The opalescent sky glowed with shades of pink and blue.
C2 noun /kəˌmɒd.ɪ.fɪˈkeɪ.ʃən/

commodification

Meaning
The transformation of goods, services, ideas, or social relations into market commodities.
Example
The commodification of education has increased tuition costs.
C2 verb /ʌnˈfrɒk/

unfrock

Meaning
To remove a priest from his position or deprive someone of a rank.
Example
The corrupt priest was unfrocked after the investigation.
C2 verb /ˈɡæmbəl/

gambol

Meaning
to run or jump about playfully
Example
The lambs gamboled in the field under the sun.
C2 noun /ˈɔːriˌoʊl/

aureole

Meaning
A halo or radiance surrounding the head or body, often in religious art.
Example
The painting showed the saint with an aureole around his head.
C2 verb /sleɪk/

slake

Meaning
To satisfy thirst or desire.
Example
She drank cold water to slake her thirst.
C2 adjective ɪnˈdɒm.ɪ.tə.bəl

indomitable

Meaning
Impossible to subdue or defeat.
Example
Her indomitable spirit helped her overcome adversity.
C2 noun /aɪˈdɒlətri/

idolatry

Meaning
The worship of idols or extreme admiration for someone or something.
Example
The priest condemned the idolatry practiced in the village.
C2 noun/verb /ˈʌpˌkæst/

upcast

Meaning
Verb: To cast or throw upward. Noun: Something thrown or directed upward.
Example
The fisherman upcast his net into the air.
C2 noun /ˌɔːrdɪˈneɪʃən/

ordination

Meaning
The ceremony of conferring holy orders or official religious authority.
Example
The church held a special service for the ordination of new priests.
C2 verb /ˈvɪʃieɪt/

vitiate

Meaning
to spoil, weaken, or make something less effective
Example
One careless remark can vitiate the entire argument.
C2 noun /ˈslæt.ən/

slattern

Meaning
a woman who is untidy or slovenly in appearance or habits
Example
The house looked as if a slattern lived there.
C2 noun /ɪˈnænɪti/

inanity

Meaning
a nonsensical remark or action; silliness; emptiness
Example
The speech was full of inanities that bored the audience.
C2 verb /ˈmɒlikɒdl/

mollycoddle

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

tonsorial

Meaning
relating to barbers or hairdressing
Example
The town's new barber offered a wide range of tonsorial services.
C2 noun /ˈfriːˌθɪŋkər/

freethinker

Meaning
A person who forms opinions based on reason and independent thought rather than tradition or authority.
Example
Voltaire was considered a great freethinker of his time.
C2 adjective /ɑːrˈbɔːr.i.əl/

arboreal

Meaning
Relating to trees or living in trees; tree-dwelling.
Example
Monkeys are arboreal animals that spend most of their time in trees.
C2 adjective /ˈmæk.jʊˌleɪ.tɪd/

maculated

Meaning
Spotted or stained; marked with blemishes.
Example
The maculated surface of the old mirror gave it a unique charm.
C2 noun /ˈdɛntɪfrɪs/

dentifrice

Meaning
a substance such as powder, paste, or liquid used to clean teeth
Example
He bought a new herbal dentifrice from the pharmacy.
C2 noun /kwɑːˈfjʊr/

coiffure

Meaning
A person's hairstyle, typically an elaborate one.
Example
Her elegant coiffure impressed everyone at the party.
C2 adjective /ɪˈlɪmɪtəbl/

illimitable

Meaning
Without limits or bounds.
Example
The universe is often described as illimitable.
C2 noun /sɑːrˈkɒfəɡəs/

sarcophagus

Meaning
A stone coffin, often decorated, used in ancient times.
Example
The museum displayed a beautifully carved sarcophagus from ancient Egypt.
C2 verb, adjective /ˈstraɪeɪt/

striate

Meaning
to mark with stripes or grooves; striped or streaked in appearance
Example
The rock surface was striated by glacial movement.
C2 verb /kənˈsɪlieɪt/

conciliate

Meaning
to stop someone from being angry; to win over by friendly acts
Example
He tried to conciliate the angry customer with an apology.
C2 noun ˌmæɡnəˈnɪmɪti

magnanimity

Meaning
Generosity in forgiving an insult or injury; forbearance.
Example
His magnanimity towards his competitors was admirable.
C2 adjective /ˌluː.mɪˈnɛs.ənt/

luminescent

Meaning
Emitting light without heat, glowing softly.
Example
The luminescent watch dial was visible in the dark.
C2 noun /ˌbeɪt ˈnwɑːr/

bete noire

Meaning
A person or thing that one particularly dislikes or fears.
Example
Grammar has always been his bete noire.
C2 noun /ˈpɔːrtɛnt/

portent

Meaning
A sign or warning that something, especially something momentous or calamitous, is likely to happen.
Example
The sudden drop in stock prices was seen as a portent of economic trouble.
C2 adjective /ˌɪndɪˈvɜːrtɪbəl/

indivertible

Meaning
Not able to be turned aside or diverted.
Example
The judge's indivertible attention was on the case.
C2 verb /dɪˈsɪmjʊˌleɪt/

dissimulate

Meaning
To disguise or conceal one's true feelings or intentions.
Example
He tried to dissimulate his fear with a smile.
C2 noun /ɪˈfrʌntəri/

effrontery

Meaning
shameless or rude boldness
Example
He had the effrontery to lie even when caught red-handed.
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 ˌhiː.məˈfɪl.i.ə

hemophilia

Meaning
A medical condition in which the ability of the blood to clot is severely reduced, causing the sufferer to bleed severely from even a slight injury.
Example
Hemophilia treatment benefits from genetic editing.
C2 noun /ˌɪn.strəˈmɛn.təl.ɪst/

instrumentalist

Meaning
A person who plays a musical instrument.
Example
The instrumentalist played a beautiful solo on the violin.
C2 adjective /ˈsɜːrkəmskraɪbd/

circumscribed

Meaning
restricted or limited in scope or freedom
Example
Her freedom of choice was circumscribed by social rules.
C2 adjective /ɪkˈsɛpʃənəbl/

exceptionable

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

agronomist

Meaning
A scientist who studies soil management and crop production.
Example
The agronomist suggested new methods to improve rice yields.
C2 verb /ˈtɛmpəˌraɪz/

temporize

Meaning
To delay making a decision or taking action in order to gain time.
Example
The politician temporized when asked about the controversial issue.
C2 adjective /ˈsiːmli/

seemly

Meaning
proper or appropriate in behavior or appearance
Example
It was not seemly to argue loudly during the ceremony.
C2 adjective /ˌɪɡ.nəˈmɪn.i.əs/

ignominious

Meaning
Marked by shame, disgrace, or humiliation.
Example
The team suffered an ignominious defeat in the finals.
C2 noun /ˈdʒɛntaɪl/

gentile

Meaning
A person who is not Jewish
Example
The synagogue welcomed both Jews and Gentiles.
C2 noun /ɑːmz/

alms

Meaning
Money, food, or goods given to the poor as charity.
Example
The monk distributed alms to the needy villagers.
C2 noun ˈbaɪəʊˌsaɪd

biocide

Meaning
A chemical substance or microorganism intended to destroy, deter, render harmless, or exert a controlling effect on any harmful organism.
Example
Biocides help control pests and reduce the spread of diseases.
C2 verb /daʊz/

dowse

Meaning
To search for underground water or minerals using a divining rod; also to drench or extinguish with liquid.
Example
The farmer tried to dowse for water in the dry field.
C2 noun /ˈɛndaɪv/ or /ˈɑːndɪv/

endive

Meaning
A leafy vegetable belonging to the chicory family, often used in salads.
Example
She added fresh endive to the salad for a slightly bitter flavor.
C2 adjective/verb /ɪnˈkɑːrneɪt/

incarnate

Meaning
to embody or represent in human form; in flesh
Example
She is kindness incarnate.
C2 noun /ˈpɜːrtnəs/

pertness

Meaning
boldness or forwardness in speech or behavior; sauciness
Example
Her pertness during the meeting surprised everyone.
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 adjective /ˌɪrɛvəˈrɛnʃəl/

irreverential

Meaning
Showing a lack of respect for things that are generally taken seriously.
Example
His irreverential humor often shocked traditional audiences.
C2 noun ট্রোপোস্ফিয়ার

troposphere

Meaning
The lowest layer of Earth's atmosphere where weather phenomena occur.
Example
The troposphere is where weather phenomena occur.
C2 noun /ˈrɛlɪkwɛri/

reliquary

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

prefigure

Meaning
to represent, show, or foreshadow something in advance
Example
The economic reforms prefigure major social changes.
C2 noun /əˈkwɪtəns/

acquittance

Meaning
a written receipt acknowledging payment or discharge of a debt
Example
He demanded an acquittance after paying the loan.
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 adjective /ɔːˈrɪkjʊlər/

auricular

Meaning
Relating to the ear or hearing.
Example
The doctor used an auricular thermometer to check the patient's temperature.
C2 noun /ˌdaɪələˈtɪʃən/

dialectician

Meaning
A person skilled in dialectic or logical argument.
Example
Socrates is often considered the greatest dialectician in history.
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 /ˈhʌvəl/

hovel

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

parch

Meaning
to make something extremely dry, especially by exposure to heat
Example
The scorching sun began to parch the fields.
C2 noun /ˈmɒdɪkəm/

modicum

Meaning
a small or moderate amount of something, especially something valuable or desirable
Example
She showed a modicum of patience during the long meeting.
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 /ˌdɒmɪˈnɪə/

domineer

Meaning
to assert one's will over another in an arrogant way
Example
He tends to domineer over his younger colleagues.
C2 noun /traɪˈʌmvɪər/

triumvir

Meaning
One of a group of three men holding power in ancient Rome.
Example
Caesar was a triumvir in the first Roman triumvirate.
C2 adjective /njuːˈtoʊniən/

newtonian

Meaning
relating to the laws of motion and gravitation formulated by Sir Isaac Newton
Example
The scientist explained the Newtonian laws of motion.
C2 verb /kənˈvʌls/

convulse

Meaning
to shake violently; to suffer sudden involuntary contractions
Example
The patient convulsed during the seizure.
C2 noun /əˈkriːʃən/

accretion

Meaning
The process of growth or increase, typically by the gradual accumulation of additional layers or matter.
Example
The accretion of wealth allowed him to invest in various projects.
C2 adverb /bɪˈtaɪmz/

betimes

Meaning
early; in good time
Example
She rose betimes to finish her work.
C2 verb /ʌpˈhiːv/

upheave

Meaning
to lift or raise something forcefully; to cause to rise suddenly
Example
The workers had to upheave the heavy stone to clear the path.
C2 noun /ˌɪnkəˈpæsəti/

incapacity

Meaning
the lack of ability, power, or fitness to do something
Example
His mental incapacity prevented him from making important decisions.
C2 noun /haɪˈdrɒmɪtər/

hydrometer

Meaning
An instrument used to measure the density or specific gravity of liquids.
Example
The brewer used a hydrometer to test the sugar content of the solution.