derivative
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C1 noun, adjective /dɪˈrɪvətɪv/

derivative

Meaning
Something that is based on another source; in math, a measure of how a function changes.
Example
The film was criticized for being too derivative of earlier works.
C1 noun /ˈdaɪnəˌmoʊ/

dynamo

Meaning
A machine that generates electricity; a person with great energy and enthusiasm.
Example
She is the real dynamo behind the success of the company.
C1 noun /liˈeɪzɒn/

liaison

Meaning
communication or cooperation between people or groups for a smooth working relationship
Example
She works as a liaison between the company and its clients.
C1 verb /wɑːft/

waft

Meaning
to move gently through the air, carried by a breeze
Example
The smell of fresh bread wafted through the kitchen.
C1 adjective /səˈdʒɛstɪv/

suggestive

Meaning
tending to suggest ideas or images; sometimes implies something sexual or provocative
Example
The painting was highly suggestive and sparked much debate.
C1 adverb /ˈduːli/

Duly

Meaning
in accordance with what is required or appropriate; at the proper time
Example
The documents were duly signed and submitted.
C1 noun /ˈtrɪkəri/

trickery

Meaning
The use of dishonest methods to deceive or cheat someone.
Example
The politician was accused of winning the election through trickery.
C1 noun /ˌtes.tɪˈmoʊ.ni.əl/

Testimonial

Meaning
a formal statement testifying to someone's character and qualifications
Example
The professor wrote a glowing testimonial for her former student.
C1 verb /ˈskwɒndər/

squander

Meaning
to waste money, time, or opportunities in a careless way
Example
He squandered his inheritance on gambling.
C1 noun /ˈstætʃuːt/

statute

Meaning
A written law passed by a legislative body.
Example
The new statute protects workers' rights.
C1 verb /əˈpɛnd/

append

Meaning
to add something as an attachment or supplement, usually at the end of a document or list
Example
She decided to append a note to the end of the report.
C1 verb /rɪˈprɛs/

repress

Meaning
To restrain, suppress, or keep under control, especially emotions or desires.
Example
He tried to repress his anger during the meeting.
C1 noun /ˈblæs.fə.mi/

blasphemy

Meaning
the act of speaking disrespectfully about God or sacred things
Example
In some countries, blasphemy is a punishable offense.
C1 adjective /dɪsˈɪntrəstɪd/

disinterested

Meaning
not influenced by personal interest; impartial or neutral
Example
The judge remained disinterested in the case.
C1 noun /ˌkɒnfɪˈdɑːnt/

confidante

Meaning
A woman with whom one shares a secret or private matter, trusting her not to repeat it.
Example
The queen’s maid became her most trusted confidante.
C1 noun /juːnəˈnɪməti/

Unanimity

Meaning
complete agreement among all members of a group
Example
The committee reached unanimity on the new policy.
C1 noun /ˈspiːʃiː/

specie

Meaning
money in the form of coins rather than notes or credit
Example
The transaction was made in specie.
C1 noun prəˈtɛk.ʃə.nɪ.zəm

protectionism

Meaning
The theory or practice of shielding a country's domestic industries from foreign competition by taxing imports.
Example
The government's protectionism helped local businesses grow.
C1 adjective /ɪˈmeʒərəbəl/

Immeasurable

Meaning
too large or extensive to measure; boundless
Example
The immeasurable love of a mother knows no bounds.
C1 verb /ˈkɒnsɪkreɪt/

consecrate

Meaning
to make something sacred, usually through a religious ceremony
Example
The church was consecrated by the bishop.
C1 noun /ˈkaʊn.tə.nəns/

countenance

Meaning
a person's face or expression; support or approval
Example
Her cheerful countenance brightened the room.
C1 noun /əˌtɜːni ˈdʒɛnərəl/

attorney-general

Meaning
The chief legal officer of a state or country.
Example
The attorney-general announced new reforms to strengthen justice.
C1 noun/verb /rɪˈproʊtʃ/

reproach

Meaning
An expression of disapproval or disappointment; to criticize someone for doing wrong.
Example
She reproached him for arriving late to the meeting.
C1 noun /ˈnoʊ.və/

Nova

Meaning
a star that suddenly increases greatly in brightness
Example
Astronomers discovered a new nova in the constellation.
C1 noun /ˈlæt.ɪ.tuːd/

Latitude

Meaning
the angular distance of a place north or south of the earth's equator; freedom to act or think
Example
The GPS device showed our exact latitude and longitude coordinates on the map.
C1 noun ˈsɛlfləsnɪs

selflessness

Meaning
The quality of being concerned more with the needs of others than with one's own.
Example
Selflessness is a key value for community building.
C1 noun /ˈdʒiː.nəs/

genus

Meaning
a category in biological classification ranking above species and below family
Example
The tiger belongs to the genus Panthera.
C1 noun /ˈvaɪəˌleɪtər/

violator

Meaning
A person who breaks or disregards a law, rule, or agreement.
Example
The police caught the traffic violator at the intersection.
C1 noun /rɪft/

rift

Meaning
a serious break in a relationship; a split or crack
Example
A rift developed between the two friends after the argument.
C1 verb /ˈpɪlɪdʒ/

pillage

Meaning
to rob or plunder a place, especially during war
Example
The invading army pillaged the village and took all valuables.
C1 noun /ˈpæs.ɪ.fɪst/

pacifist

Meaning
a person who believes in peace and opposes war or violence
Example
She is a committed pacifist who campaigns against armed conflict.
C1 noun /ˈbʊzəm/

bosom

Meaning
the human chest, especially a woman’s breast; also used metaphorically to refer to closeness or intimacy
Example
She kept the secret close to her bosom.
C1 verb /kəˈpɪtjʊˌleɪt/

capitulate

Meaning
to surrender or give in after resisting
Example
The army had no choice but to capitulate to the enemy.
C1 noun /kənˈdəʊləns/

condolence

Meaning
An expression of sympathy, especially on the occasion of death.
Example
She offered her sincere condolence to the grieving family.
C1 verb, noun /mʊər/

moor

Meaning
As a verb: to tie a ship so that it stays in place. As a noun: open, uncultivated land.
Example
The sailors moored the ship at the dock.
C1 verb /əˈkrɛdɪt/

accredit

Meaning
to officially recognize, authorize, or approve someone or something
Example
The university is accredited by the national education board.
C1 adjective /ˌæpəˈθɛtɪk/

apathetic

Meaning
showing or feeling little or no interest, enthusiasm, or concern
Example
He was apathetic about the outcome of the match.
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 adverb /ˈleŋθ.waɪz/

Lengthwise

Meaning
in the direction of the length; along the longest dimension
Example
Fold the paper lengthwise to make it easier to carry.
C1 noun ˈʌp.raɪ.zɪŋ

uprising

Meaning
An act of resistance or rebellion; a revolt against an authority or government.
Example
The uprising marked the beginning of the revolution.
C1 adjective /ˈvɪʒ.ən.er.i/

Visionary

Meaning
having original ideas about what the future will bring; innovative; imaginative
Example
Steve Jobs was a visionary leader who revolutionized technology.
C1 adjective /ɪˈlɪsɪt/

illicit

Meaning
Forbidden by law, rules, or custom.
Example
The police shut down the illicit drug operation.
C1 verb /ɪnˈdʌkt/

induct

Meaning
to formally admit someone into a position, organization, or office
Example
She was inducted into the university's honor society.
C1 verb /əˈflɪkt/

afflict

Meaning
to cause pain, suffering, or distress to someone or something
Example
Many people are afflicted by seasonal allergies.
C1 noun /ˈsʌtlti/

subtlety

Meaning
The quality or state of being subtle.
Example
She understood the subtlety of the situation.
C1 noun /ˈhɪr.seɪ/

Hearsay

Meaning
information received from other people that one cannot adequately substantiate; rumor
Example
The accusations were based on hearsay rather than concrete evidence or eyewitness testimony.
C1 adjective /pəˈrɪʒən/

parisian

Meaning
relating to Paris or its people
Example
She wore a Parisian style dress at the party.
C1 noun /ˌmælnuːˈtrɪʃən/

Malnutrition

Meaning
Lack of proper nutrition; poor nourishment
Example
Malnutrition among children is a serious public health concern.
C1 adjective /ˈreɪ.si/

racy

Meaning
Lively, entertaining, or slightly shocking (especially in a sexual way).
Example
The novel was full of racy dialogues.
C1 adjective /ˌʌnəbˈtruːsɪv/

unobtrusive

Meaning
not attracting attention; blending in without causing notice
Example
The security cameras are designed to be unobtrusive.
C1 noun /stents/

stents

Meaning
Small mesh tubes used to treat narrow or blocked arteries.
Example
Stents were successfully placed using robotic techniques.
C1 adjective /ˈmjuːtɪd/

muted

Meaning
softened in sound, color, or effect; subdued
Example
The room was painted in muted shades of blue and grey.
C1 noun /ˌɪn.trəˈspek.ʃən/

introspection

Meaning
The examination or observation of one's own mental and emotional processes; self-reflection.
Example
Through introspection, she gained insight into her emotions.
C1 adjective /ˈkɑːr.di.æk/

cardiac

Meaning
Relating to the heart.
Example
The patient was admitted with a cardiac condition.
C1 noun /ˈʌndərdɒɡ/

underdog

Meaning
a competitor thought to have little chance of winning; a weaker party in a contest
Example
The underdog team surprised everyone by winning the championship.
C1 adjective /taɪˈtænɪk/

titanic

Meaning
Of exceptional strength, size, or power.
Example
The company made titanic efforts to expand into new markets.
C1 verb /sɪˈkriːt/

secrete

Meaning
to produce and release a substance from a cell, gland, or organ
Example
The pancreas secretes insulin to regulate blood sugar levels.
C1 noun /ˌmɪdˈsʌm.ər/

midsummer

Meaning
The middle of summer, often around the summer solstice in June.
Example
We had a festival to celebrate midsummer.
C1 noun əˈpreɪ.zəl

appraisal

Meaning
An assessment or evaluation of performance or quality.
Example
The annual appraisal determines salary increments.
C1 adjective ɪnˈkʌm.bənt

incumbent

Meaning
necessary for (someone) as a duty or responsibility.
Example
It is incumbent upon all citizens to obey the law.
C1 adjective /ˈɑp.ər.ə.tɪv/

Operative

Meaning
Functioning; in effect; working; active;
Example
The new safety protocols became operative immediately after the accident.
C1 adjective /ˈboʊɡəs/

bogus

Meaning
false, fake, or not genuine
Example
The police arrested him for using a bogus ID card.
C1 adjective /dɪˈmɪnjətɪv/

diminutive

Meaning
extremely or unusually small
Example
Despite his diminutive size, he was a powerful leader.
C1 verb /ˈnɛsəl/

nestle

Meaning
to settle or lie comfortably within or against something
Example
The child nestled into her mother's arms.
C1 noun /ˌluː.mɪˈnɒs.ɪ.ti/

luminosity

Meaning
The intrinsic brightness of a celestial object; the quality of emitting light.
Example
The luminosity of the star was measured with advanced instruments.
C1 noun /sɪlt/

silt

Meaning
Fine sand, clay, or other material carried by running water and deposited as a sediment.
Example
The river deposited layers of silt along its banks.
C1 adjective /ˈspeɪʃəl/

spatial

Meaning
relating to space or the position, area, and size of things
Example
The scientist studied the spatial arrangement of stars.
C1 verb /ˈrʌf.l̩/

ruffle

Meaning
to disturb the smoothness of something; to annoy or upset someone
Example
The wind ruffled her hair.
C1 noun /əˈlɜːrtnəs/

alertness

Meaning
the state of being mentally aware and quick to notice or respond; vigilance
Example
The driver maintained a high level of alertness during the long journey.
C1 adjective /ˌɪndɪˈsaɪsɪv/

Indecisive

Meaning
unable to make decisions quickly; hesitant; wavering
Example
She was indecisive about which university to attend.
C1 adjective /ˈmæn.əd/

mannered

Meaning
Having or showing a particular manner, especially an artificial or affected one.
Example
The actor’s performance was too mannered to feel natural.
C1 noun /ˌænəsˈθetɪk/

anesthetic

Meaning
A substance that causes loss of sensation or consciousness, especially used during surgery.
Example
The doctor administered a local anesthetic before stitching the wound.
C1 noun /ˌʌl.tɪˈmeɪ.təm/

Ultimatum

Meaning
a final demand or statement of terms, the rejection of which will result in retaliation
Example
The boss gave him an ultimatum: improve or be fired.
C1 noun /dɪˈmiːnər/

demeanour

Meaning
a person's outward behavior or appearance
Example
Her calm demeanour impressed everyone during the meeting.
C1 noun /ˌɪm.pəˈzɪʃ.ən/

Imposition

Meaning
the action or process of imposing something or of being imposed; an unfair burden or demand
Example
The imposition of new taxes without consultation angered the citizens greatly.
C1 adjective /ˌaɪ.di.əˈlɒdʒ.ɪ.kəl/

ideological

Meaning
Relating to or based on a system of ideas or beliefs.
Example
The two parties are divided by deep ideological differences.
C1 noun /ˈvɜːrtɪˌɡoʊ/

vertigo

Meaning
A sensation of spinning or dizziness, often caused by problems in the inner ear or brain.
Example
She felt a sudden vertigo when she looked down from the tall building.
C1 phrase ˌdɪp.ləˈmæt.ɪk rɛz.əˈluː.ʃən

diplomatic resolution

Meaning
A peaceful solution to conflicts through negotiation and diplomatic channels.
Example
A diplomatic resolution is necessary for peace.
C1 adjective /ɪmˈpɜːrtɪnənt/

impertinent

Meaning
rude and showing a lack of respect
Example
It was impertinent of him to question the manager's decision.
C1 verb /ˈbɛkən/

beckon

Meaning
to signal or call someone to come closer, often with a gesture; to attract or invite
Example
She beckoned him to come closer with a wave of her hand.
C1 noun /ˈpælɪt/

pallet

Meaning
a flat wooden platform used for moving or storing goods; also a makeshift bed
Example
The boxes were stacked on a wooden pallet for easy transport.
C1 noun ˈpɜː.mə.kʌl.tʃər

permaculture

Meaning
The development of agricultural ecosystems intended to be sustainable and self-sufficient.
Example
Permaculture promotes self-sufficient farming systems.
C1 noun ˈoʊʃən əˌsɪdɪfɪˈkeɪʃən

ocean acidification

Meaning
The ongoing decrease in the pH of the Earth's oceans, caused by the absorption of carbon dioxide from the atmosphere.
Example
Ocean acidification is caused by atmospheric CO2 absorption.
C1 adjective /ˈmaʊntɪnəs/

Mountainous

Meaning
having many mountains; characterized by mountains
Example
The mountainous region was difficult to travel through.
C1 adjective /ˌnjʊə.rəˈlɒdʒ.ɪ.kəl/

neurological

Meaning
Relating to the anatomy, functions, and organic disorders of nerves and the nervous system.
Example
Meditation has positive neurological effects on mental health.
C1 noun /ˈbæs.ti.ən/

bastion

Meaning
a stronghold or fortification; a place or institution strongly defending particular principles
Example
The castle stood as a bastion against enemy attacks.
C1 adverb /ˈhɛdˌlɔŋ/

headlong

Meaning
With the head leading; in a rush or without thinking.
Example
She rushed headlong into the new project.
C1 noun /heɪz/

Haze

Meaning
a slight obscuration of the lower atmosphere, typically caused by fine suspended particles; confusion
Example
The morning haze lifted gradually as the sun rose higher in the sky.
C1 verb /ˈkʌl.mɪ.neɪt/

culminate

Meaning
To reach the final or climactic stage of a process or activity.
Example
Years of hard work culminated in his success.
C1 adjective /bəˈzɜːrk/

berserk

Meaning
Out of control with anger or excitement; wild or frenzied.
Example
The fans went berserk when their team won the championship.
C1 verb /ɪɡˈzuːd/

exude

Meaning
to display a quality strongly and openly; to release a liquid or smell slowly
Example
He exudes confidence whenever he speaks in public.
C1 noun kəˈmɛns.mənt

commencement

Meaning
The beginning of something; a ceremony at which degrees or diplomas are conferred on graduating students.
Example
The commencement ceremony marked the start of a new journey.
C1 noun /kənˈtʃɛrtoʊ/

concerto

Meaning
a musical composition for one or more solo instruments accompanied by an orchestra
Example
She played a Mozart concerto with the orchestra.
C1 noun /ˈproʊbeɪt/

probate

Meaning
the official proving of a will in a court of law
Example
The family had to go through probate after his death.
C1 noun/adjective/verb /bʌf/

buff

Meaning
A fan or enthusiast; also to polish or shine something.
Example
He is a movie buff who watches films every weekend.
C1 noun ˈiː.θɒs

ethos

Meaning
The characteristic spirit of a culture, era, or community as manifested in its beliefs and aspirations.
Example
The company's ethos is built on innovation and integrity.
C1 verb /ɪnˈtruːd/

intrude

Meaning
To enter a place or situation where one is not wanted or not invited.
Example
He felt embarrassed to intrude on their private conversation.
C1 adjective ˈkʌm.bə.səm

cumbersome

Meaning
Heavy, unwieldy, difficult to handle or carry.
Example
The cumbersome luggage slowed him down.
C1 noun /ˌæktʃuˈæləti/

actuality

Meaning
The state of existing in reality rather than in appearance or imagination.
Example
The movie was based on historical actuality.
C1 noun /səˈnɑːtə/

sonata

Meaning
A musical composition for one or more instruments, typically in several movements.
Example
She performed a beautiful Beethoven sonata on the piano.
C1 noun /fɪˈnɛs/

finesse

Meaning
Subtlety and skill; refinement and delicacy in performance or artistry.
Example
The artist painted with great finesse.
C1 noun /ˈʃoʊ.vəˌnɪz.əm/

chauvinism

Meaning
Excessive or prejudiced support for one's own cause, group, or gender, often with contempt for others.
Example
The company's culture was criticized for promoting male chauvinism.
C1 verb /fɔːrˈʃædoʊ/

foreshadow

Meaning
To indicate or suggest something that will happen in the future
Example
Dark clouds foreshadowed an approaching storm.
C1 adjective ˌbjʊə.rəˈkræt.ɪk

bureaucratic

Meaning
Involving or characterized by complex rules and procedures that can delay the achievement of goals.
Example
Bureaucratic red tape often delays project approvals.
C1 adjective /lʌʃ/

lush

Meaning
rich, abundant, and luxurious, especially referring to vegetation
Example
The valley was filled with lush green fields.
C1 noun /ɪˈnɪɡ.mə/

enigma

Meaning
A person or thing that is mysterious, puzzling, or difficult to understand.
Example
Life remains an enigma to many.
C1 adjective /ˈsɛn.sər.i/

sensory

Meaning
Related to the five human senses (sight, hearing, taste, touch, smell).
Example
Sensory feedback enhances the VR experience.
C1 noun /ˈdiːviəns/

deviance

Meaning
Behavior that differs from accepted social or moral standards.
Example
The book studies deviance in urban youth culture.
C1 verb sɪˈkwɛstər

sequester

Meaning
To isolate or hide away.
Example
The carbon captured by trees can be sequestered for years.
C1 adjective /ˈkɔːrdiəl/

Cordial

Meaning
warmly friendly; sincere; heartfelt
Example
She gave us a cordial welcome at the front door.
C1 noun /ˈkæpɪˌlɛri/

capillary

Meaning
a very thin blood vessel that connects arteries and veins
Example
Oxygen passes from the blood into tissues through capillaries.
C1 noun /ˈkrɛvɪs/

crevice

Meaning
a narrow crack or opening, especially in a rock or wall
Example
The lizard hid in a crevice between the stones.
C1 verb /mɔːrf/

morph

Meaning
to change smoothly from one form, shape, or character into another
Example
The caterpillar will morph into a butterfly.
C1 noun /təˈnæs.ə.ti/

tenacity

Meaning
Determination, persistence, and the quality of not giving up
Example
His tenacity in solving problems led to his success.
C1 adjective /prəˈfɛtɪk/

prophetic

Meaning
accurately predicting or describing what will happen in the future
Example
His prophetic words came true after many years.
C1 noun /ˈprɒvɪdəns/

providence

Meaning
the protective care of God or nature as a spiritual power; foresight or prudence
Example
They believed their survival was due to divine providence.
C1 noun /ˈʃʊɡ.ər ˈkæn.di/

Sugar candy

Meaning
crystallized sugar formed into small pieces; rock candy made from sugar syrup
Example
The children enjoyed eating colorful sugar candy at the festival.
C1 adjective /ˌmɛtəˈfɔːrɪkəl/

metaphorical

Meaning
Characteristic of or relating to metaphor; figurative rather than literal.
Example
He used metaphorical language to describe his emotions.
C1 noun/adjective /ˈmɪstɪk/

mystic

Meaning
relating to mysteries, spirituality, or hidden truths; a person who seeks spiritual insight
Example
The mystic devoted his life to meditation and spiritual discovery.
C1 adjective /ʌnˈwɪtɪŋ/

unwitting

Meaning
Not aware of what is happening; done without realizing.
Example
She became an unwitting participant in the scam.
C1 noun /baɪl/

Bile

Meaning
a bitter greenish-brown alkaline fluid that aids digestion and is secreted by the liver and stored in the gallbladder
Example
The liver produces bile to help digest fats.