theorize
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C1 verb /ˈθiːəraɪz/

theorize

Meaning
To form a theory or set of ideas to explain something.
Example
Scientists often theorize about the origins of the universe.
C1 adjective /ˌwɛl tə ˈduː/

well-to-do

Meaning
Prosperous, wealthy, or financially comfortable.
Example
They belong to a well-to-do family in the city.
C1 adjective, noun /ɪnˈdɪkətɪv/

indicative

Meaning
Serving as a sign or expression of something; in grammar, a mood used to make factual statements.
Example
His tone was indicative of his frustration.
C1 adjective ɪˈræt.ɪk

erratic

Meaning
Unpredictable and inconsistent; not even or regular in pattern or movement.
Example
His erratic behavior confused his colleagues.
C1 adjective /rɪˈpɛlənt/

repellent

Meaning
Able to drive away something, especially insects or unpleasant things; causing disgust or distaste.
Example
This cream is highly effective as a mosquito repellent.
C1 adjective /pərˈmɪsəbl̩/

permissible

Meaning
allowed or permitted by rules or law
Example
It is permissible to park here after 6 p.m.
C1 noun /ˈpɛnənt/

pennant

Meaning
A tapering flag used for signaling or as an emblem of victory or achievement.
Example
The team raised the championship pennant proudly.
C1 adjective /ɪkˈsiːdɪŋ/

Exceeding

Meaning
going beyond; surpassing; extremely
Example
The project was completed with exceeding excellence.
C1 noun /kæpˈtɪv.ɪ.ti/

Captivity

Meaning
the condition of being imprisoned or confined
Example
After years of captivity, the prisoner was finally released.
C1 verb /ˈɛkstrəˌdaɪt/

extradite

Meaning
to hand over a person accused or convicted of a crime to another country or state
Example
The government agreed to extradite the fugitive to his home country.
C1 verb /ˈlæmɪˌneɪt/

laminate

Meaning
to cover or enclose something with a protective layer, usually plastic
Example
She laminated her important documents to protect them from damage.
C1 verb /ˈsʌkɪŋ/

sucking

Meaning
Drawing in a liquid, air, or other substance through the mouth or a tube by creating a vacuum; also used figuratively for something unpleasant or ineffective
Example
The baby is sucking on a pacifier.
C1 noun /ˈviːəməns/

Vehemence

Meaning
great forcefulness or intensity of feeling or expression; passionate conviction
Example
He argued with such vehemence that everyone was surprised.
C1 adjective /ˈstætʃətɔːri/

statutory

Meaning
Required, permitted, or enacted by law.
Example
The company must comply with all statutory regulations.
C1 adjective /raɪ/

wry

Meaning
twisted or distorted in expression; showing dry, mocking humor
Example
He gave a wry smile after hearing the sarcastic remark.
C1 noun /ˈskaɪ.lɑːrk/

Sky-Lark

Meaning
a small brown bird known for singing while flying high in the sky
Example
The skylark sang beautifully as it soared above the meadow.
C1 noun /ˈmiːnnəs/

Meanness

Meaning
The quality of being unkind, spiteful, or unfair; stinginess
Example
His meanness towards the poor children shocked everyone in the neighborhood.
C1 preposition /əˈtɒp/

atop

Meaning
on the top of something
Example
A flag was placed atop the tower.
C1 verb /dɪˈraɪd/

deride

Meaning
to mock or ridicule someone or something
Example
The critics derided the new movie for its poor script.
C1 adjective /ˈkɒɡ.nɪ.zənt/

cognizant

Meaning
Having knowledge or being aware of something.
Example
He was cognizant of the risks before starting the project.
C1 adjective /ɪˈnɔːɡjərəl/

Inaugural

Meaning
marking the beginning of something; first; opening
Example
The president delivered his inaugural speech.
C1 adjective /ˈræɡ.ɪd/

Ragged

Meaning
torn; tattered; frayed; shabby
Example
The homeless man wore ragged clothes.
C1 noun /hɔːrd/

horde

Meaning
A large group or crowd, especially one that is disorderly or difficult to control.
Example
A horde of fans gathered outside the stadium.
C1 noun /ˈoʊvərˌtʊr/

overture

Meaning
An introduction to something more substantial; a proposal or preliminary action.
Example
The peace overture was welcomed by both nations.
C1 verb/noun /pərˈvɜːrt/

pervert

Meaning
As a verb: to distort the meaning or purpose of something; as a noun: a person with abnormal or immoral sexual behavior.
Example
He tried to pervert the truth to escape punishment.
C1 noun /ˈɪn.tə.lekt/

intellect

Meaning
The ability to think, reason, and understand objectively.
Example
Her intellect is admired by all her colleagues.
C1 noun /ˌtæm.bəˈriːn/

Tambourine

Meaning
a small drum with metal discs around the edge that jingle when shaken or hit
Example
She shook the tambourine to the rhythm of the music.
C1 noun /ˌɪmpɔːrˈteɪʃən/

importation

Meaning
The act of bringing goods or services into a country from abroad
Example
The importation of luxury goods is strictly regulated.
C1 verb /dɪsˈpruːv/

disprove

Meaning
to show that something is false or wrong
Example
The scientist worked hard to disprove the old theory.
C1 noun /rʌsk/

Rusk

Meaning
a hard, dry biscuit or twice-baked bread; a type of crisp, sweet biscuit
Example
The baby enjoyed eating the soft rusk with milk.
C1 verb pɚˈpɛtʃ.u.eɪt

perpetuate

Meaning
To keep something continuously running or maintain it for a long time.
Example
The media can sometimes perpetuate harmful stereotypes.
C1 adjective /ˈlaʊzi/

lousy

Meaning
of very poor quality; bad or unpleasant
Example
He felt lousy after catching the flu.
C1 noun /ˈmɪd.waɪf/

midwife

Meaning
A person, typically a woman, trained to assist women during childbirth.
Example
The midwife stayed with the mother throughout her labor.
C1 adverb /ˈvaɪtəli/

vitally

Meaning
in an extremely important or essential way; in a manner relating to life or vitality
Example
Access to clean water is vitally important for public health.
C1 noun /kəˈres/

Caress

Meaning
a gentle or loving touch
Example
The mother's gentle caress calmed the crying baby.
C1 noun /ɪˈklɪps/

Eclipse

Meaning
an obscuring of light from one celestial body by another; a decline or loss
Example
The total solar eclipse darkened the sky for several minutes.
C1 adjective /æmˈbɪvələnt/

ambivalent

Meaning
Having mixed or contradictory feelings about something or someone.
Example
She was ambivalent about accepting the new job offer.
C1 adjective /ɑːrˈkeɪn/

arcane

Meaning
understood by few; mysterious or secret
Example
The professor’s lecture was full of arcane details that only specialists could follow.
C1 adjective /ˌæbəˈrɪdʒənəl/

aboriginal

Meaning
Relating to the original inhabitants of a region.
Example
The museum has a large collection of aboriginal art.
C1 noun /ˈpleɪn.tɪf/

Plaintiff

Meaning
a person who brings a case against another in a court of law; the person who initiates a lawsuit
Example
The plaintiff filed a lawsuit against the company.
C1 verb /ɪˈloʊp/

elope

Meaning
to run away secretly in order to get married, especially without parental consent
Example
The young couple decided to elope to another city.
C1 adjective /vəˈluː.mə.nəs/

voluminous

Meaning
Occupying or containing much space; large in volume, in particular.
Example
The library contained a voluminous collection of books.
C1 noun /ʃəˈreɪd/

charade

Meaning
an absurd pretense or act intended to deceive; also a word-guessing game
Example
The trial was nothing more than a political charade.
C1 noun /ˈpɛdlər/

peddler

Meaning
a person who sells goods, often traveling from place to place
Example
The peddler walked through the village selling fresh fruits.
C1 adjective /ˈtrɛtʃərəs/

treacherous

Meaning
Dangerously unstable or deceptive; likely to betray trust.
Example
The treacherous road made driving difficult.
C1 noun /ˈɔr.ə.tər/

Orator

Meaning
a public speaker, especially one who is eloquent or skilled in speaking
Example
The famous orator delivered an inspiring speech.
C1 adjective /ˈstɪndʒi/

stingy

Meaning
unwilling to spend or give; miserly
Example
He is too stingy to buy a gift for his friend.
C1 verb /ˈpɛdəl/

peddle

Meaning
To sell goods, often by going from place to place; sometimes used negatively to mean promoting an idea or product in a pushy way.
Example
Street vendors peddle handmade jewelry to tourists.
C1 noun /njʊəˈrəʊ.sɪs/

neurosis

Meaning
A relatively mild mental illness that is not caused by organic disease, involving symptoms of stress.
Example
His neurosis made social interactions difficult.
C1 adjective /ˈdrɪəri/

dreary

Meaning
dull, bleak, and lifeless; depressing
Example
The long, dreary winter made everyone feel gloomy.
C1 noun /ˈænərkɪst/

anarchist

Meaning
a person who believes in or promotes the absence of government or authority
Example
The anarchist group protested against state control.
C1 verb /ˈɡɑː.nɪʃ/

garnish

Meaning
To decorate food with small items for added flavor or visual appeal.
Example
She garnished the dish with fresh coriander leaves.
C1 noun /ˈlʊkaʊt/

lookout

Meaning
A place for watching; a person keeping watch.
Example
The guard kept a lookout for suspicious activity.
C1 verb /ˌʌn.dəˈtʃɑːrdʒ/

undercharge

Meaning
To charge less than the correct or fair amount.
Example
The shopkeeper accidentally undercharged me for the groceries.
C1 adjective, noun /ˈpæstərəl/

pastoral

Meaning
relating to the countryside, shepherds, or rural life; also relating to spiritual guidance by a pastor
Example
The painting had a calm pastoral scene with sheep grazing.
C1 noun /ˌklɔːstrəˈfəʊbiə/

claustrophobia

Meaning
an extreme or irrational fear of being in confined spaces
Example
He avoids elevators because of his claustrophobia.
C1 verb /skʌf/

scuff

Meaning
to mark or scratch the surface of something by rubbing
Example
He scuffed his shoes on the pavement.
C1 phrasal verb /ɡlɒs ˈoʊ.vər/

gloss over

Meaning
to avoid discussing something unpleasant or make it seem less important
Example
The report glossed over the company's financial problems.
C1 noun /mɪkst ɪˈkɒn.ə.mi/

mixed economy

Meaning
An economic system where both government and private sector operate together.
Example
Most countries today follow a mixed economy model.
C1 verb /ˌmɪsˈkaʊnt/

miscount

Meaning
To count wrongly or inaccurately.
Example
He miscounted the number of chairs in the hall.
C1 noun /ˌvəʊ.kəl.aɪˈzeɪ.ʃən/

vocalization

Meaning
The action of producing sounds with the voice; the expression of thoughts or feelings in spoken words.
Example
The vocalization of the singer captivated the audience.
C1 noun /ˈbɜːrθraɪt/

birthright

Meaning
A privilege or possession that a person has from birth.
Example
Freedom is considered a birthright of every individual.
C1 adjective /klænˈdɛstaɪn/

clandestine

Meaning
kept secret or done secretly, especially for illicit purposes
Example
They held a clandestine meeting late at night.
C1 noun /kənˈfɔːrmɪst/

conformist

Meaning
A person who uncritically conforms to established practices or standards.
Example
She was labeled a conformist for always following the crowd.
C1 noun /fruːˈɡæl.ə.ti/

frugality

Meaning
The quality of being economical in use or expenditure; not wasteful.
Example
Frugality is essential for saving money effectively.
C1 noun /ˌɑːrtʃˈbɪʃəp/

archbishop

Meaning
A senior bishop in charge of an archdiocese in the Christian Church.
Example
The archbishop delivered a sermon to thousands of people.
C1 adjective /ɪnˈɡreɪnd/

engrained

Meaning
Firmly fixed or established; difficult to change.
Example
Cultural practices are often deeply engrained in the fabric of society.
C1 noun /lʌmp/

Lump

Meaning
a compact mass of a substance, especially one without a definite or regular shape
Example
She found a lump of sugar in the bowl.
C1 verb /bɔːl/

bawl

Meaning
to shout or cry loudly
Example
The baby bawled all night, keeping everyone awake.
C1 adjective /fɪkˈtɪʃəs/

fictitious

Meaning
not real or true; imaginary or fabricated
Example
The story he told was entirely fictitious.
C1 adjective /ˈsɪlkən/

Silken

Meaning
made of silk; smooth and soft like silk
Example
She wore a beautiful silken dress to the party.
C1 adverb /ɪnˈdɛfɪnətli/

indefinitely

Meaning
for an unlimited or unspecified period of time
Example
The project has been postponed indefinitely.
C1 verb /ɪˈlɪsɪt/

elicit

Meaning
To draw out a response, answer, or reaction from someone.
Example
The teacher’s question elicited thoughtful answers from the students.
C1 adverb /əˈraɪ/

awry

Meaning
away from the expected or proper direction; wrong or amiss
Example
The plan went awry when the weather suddenly changed.
C1 verb /ˈɒs.ɪ.leɪt/

oscillate

Meaning
To swing or move back and forth between two points or states
Example
The stock market tends to oscillate during uncertain times.
C1 verb /ˌʌndərˈvæljuː/

undervalue

Meaning
To assign too low a value or importance to something or someone.
Example
She felt that her boss consistently undervalued her contributions.
C1 verb /ˌmɪsˌrɛprɪˈzɛnt/

misrepresent

Meaning
to give a false or misleading account of something
Example
The lawyer accused the witness of trying to misrepresent the facts.
C1 verb /ɪkˈstɔːrt/

extort

Meaning
to obtain something, especially money, by force, threats, or unfair means
Example
The gang attempted to extort money from local shopkeepers.
C1 noun /ˈhɪntərlænd/

hinterland

Meaning
The remote or less developed areas away from the coast or a city.
Example
The farmers came from the rural hinterland to sell their produce in the city.
C1 noun /speɪt/

spate

Meaning
a large number of things occurring in quick succession
Example
There has been a spate of robberies in the city.
C1 noun, verb /ˈfɜːrloʊ/

furlough

Meaning
temporary leave of absence from work, especially that granted to an employee or soldier
Example
Many workers were placed on furlough during the crisis.
C1 adjective/adverb /əˈmɪs/

amiss

Meaning
Not quite right; inappropriate or out of place.
Example
Something seems amiss with the car's engine.
C1 noun /rɪˌsɛptɪˈvɪti/

receptivity

Meaning
The ability or willingness to receive something, especially signals or stimuli.
Example
Her receptivity to new ideas helped improve the project.
C1 noun /əˈsɛndənsi/

ascendancy

Meaning
A position of power, influence, or control over others.
Example
The company gained ascendancy in the market through innovation.
C1 noun /ˈpɛdəstəl/

pedestal

Meaning
the base or support on which a statue or object stands
Example
The statue was placed on a marble pedestal.
C1 noun /ˈdɪs.ə.nəns/

dissonance

Meaning
Disagreement, lack of harmony, conflict between ideas or beliefs.
Example
The cultural dissonance created misunderstandings.
C1 adjective /ɪnˈlaɪ.tənd/

Enlightened

Meaning
having or showing a rational, modern outlook; having spiritual knowledge or understanding
Example
The enlightened teacher shared wisdom with all her students.
C1 noun /rɪˈfaɪnəri/

refinery

Meaning
an industrial facility where raw materials are processed and purified
Example
The oil refinery processes thousands of barrels daily.
C1 adjective /ɪmˈpæʃənd/

impassioned

Meaning
Filled with or showing great emotion.
Example
She gave an impassioned speech about human rights.
C1 noun /ˈdaɪhɑːrd/

diehard

Meaning
A person who strongly resists change and remains loyal to a belief or cause.
Example
He is a diehard fan of classic rock music.
C1 noun /ˈredʒ.ɪ.mən/

regimen

Meaning
A prescribed course of medical treatment, way of life, or diet for the promotion or restoration of health.
Example
A strict exercise regimen improves overall fitness.
C1 noun /ˌbaɪˈlæt.ər.əl nɪˌɡəʊ.ʃiˈeɪ.ʃənz/

bilateral negotiations

Meaning
Negotiations or discussions between two parties, typically countries or organizations.
Example
Bilateral negotiations resolve disputes.
C1 noun /ˈdʒɛntri/

gentry

Meaning
People of good social position, usually of high birth or wealthy landowners
Example
The gentry of the town gathered for the annual ball.
C1 verb /əˈfɪks/

affix

Meaning
to attach or stick something firmly to another thing
Example
Please affix the stamp to the envelope.
C1 noun /ˈveɪpəraɪzər/

vaporizer

Meaning
a device that turns a liquid into vapor, often for inhalation
Example
She used a vaporizer to ease her cough.
C1 adjective /dɪˈspɪkəbl/

despicable

Meaning
Deserving hatred and contempt; vile or shameful.
Example
His despicable actions shocked the entire community.
C1 verb /ˈhɪpnətaɪz/

hypnotize

Meaning
to put someone into a state of hypnosis; to influence someone's mind deeply
Example
The magician tried to hypnotize the audience.
C1 noun /ˈɪŋklɪŋ/

inkling

Meaning
A slight idea, hint, or suspicion about something.
Example
She had an inkling that he was planning a surprise.
C1 adjective /ˈtɛmpərd/

tempered

Meaning
having a specified temper or disposition; strengthened or moderated.
Example
She gave a tempered response to the criticism.
C1 adjective /ˈɪnfəməs/

infamous

Meaning
well known for some bad quality or deed
Example
The dictator was infamous for his cruelty.
C1 noun /ˈmʌs.tərd siːdz/

Mustard seeds

Meaning
small round seeds from the mustard plant, used as a spice and for making mustard condiment
Example
Mustard seeds are often tempered in hot oil to release their nutty flavor before adding to dishes.
C1 adjective ˌɜː.ɡəˈnɒm.ɪk

ergonomic

Meaning
Designed for efficiency and comfort in the working environment; user-friendly and reducing strain.
Example
The chair has an ergonomic design for better posture.
C1 noun ˈɛf.lu.ənt

effluent

Meaning
Liquid waste or sewage discharged into a river or the sea.
Example
Factory effluent contaminates nearby rivers and lakes.
C1 noun /ˌmɒd.jʊˈleɪ.ʃən/

modulation

Meaning
The process of varying or controlling something.
Example
Proper modulation of voice enhances communication skills.
C1 verb /vɪə(r)/

veer

Meaning
to change direction suddenly
Example
The car veered off the road to avoid the accident.
C1 noun /ˌɪntəkəˈnɛktɪvɪti/

interconnectivity

Meaning
The state of being interconnected or the degree of connectivity between components
Example
The rise of interconnectivity has transformed global communication.
C1 adjective /æmˈfɪb.i.əs/

Amphibious

Meaning
able to live both on land and in water; suitable for both land and water operations
Example
The amphibious vehicle can travel on both land and water.
C1 verb /ˈsætʃəˌreɪt/

saturate

Meaning
to fill completely with something until no more can be absorbed
Example
The heavy rain saturated the ground within minutes.
C1 verb /ˌriːˈtʌtʃ/

retouch

Meaning
To improve or repair a picture, photograph, or image by making small changes.
Example
The photographer retouched the image to remove blemishes.
C1 adjective pərˈnɪʃəs

pernicious

Meaning
Having a harmful effect, especially in a gradual or subtle way.
Example
The pernicious effects of smoking are well-documented.
C1 noun /ˈtʌrɪt/

turret

Meaning
A small tower on top of a larger tower or building, often used in castles or fortifications.
Example
The castle was guarded by soldiers stationed in the turret.
C1 adjective /ˌmʌltɪˈfæsɪtɪd/

multifaceted

Meaning
Having many different aspects or features
Example
The multifaceted approach to the problem resulted in innovative solutions.
C1 noun /ˈhɪpnətɪzəm/

hypnotism

Meaning
The practice or act of inducing hypnosis.
Example
He studied hypnotism as part of his psychology degree.
C1 noun ˌæp.əˈreɪ.təs

apparatus

Meaning
The technical equipment or machinery needed for a particular activity or purpose.
Example
The apparatus was designed to be eco-friendly.
C1 adjective /ɪnˈfleɪtɪd/

inflated

Meaning
excessively increased in size, value, or importance; filled with air or gas
Example
The company faced criticism for its inflated prices.
C1 noun /ˈplɛθərə/

plethora

Meaning
an excessive amount of something
Example
She has a plethora of books on her shelf.
C1 verb, noun /miˈændər/

meander

Meaning
to wander aimlessly or follow a winding course
Example
We meandered through the old streets of the city.
C1 adjective /moʊv/

mauve

Meaning
a pale purple color with a grayish or bluish tinge
Example
She wore a beautiful mauve dress to the party.
C1 noun /əˈbændənmənt/

abandonment

Meaning
the act of leaving someone or something behind completely; the state of being deserted
Example
The child suffered deep emotional pain because of abandonment.
C1 noun /ˈfɪʃ.ər/

fissure

Meaning
a long, narrow opening or crack in a surface or object
Example
The earthquake caused a deep fissure in the road.
C1 adjective, noun /ˈɪnvəlɪd/ (adjective), /ɪnˈvælɪd/ (noun)

invalid

Meaning
Not valid; having no force or effect. Also refers to a person too weak or ill to care for themselves.
Example
The court declared the contract invalid.