carbon sequestration
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C1 noun ˈkɑːr.bən ˌsiː.kwəˈstreɪ.ʃən

carbon sequestration

Meaning
The process of capture and long-term storage of atmospheric carbon dioxide to mitigate or defer global warming.
Example
Forests play a key role in carbon sequestration.
C1 adjective /ˈstɛriəˌtaɪpt/

stereotyped

Meaning
Conforming to a fixed or oversimplified idea of what someone or something is like.
Example
His stereotyped jokes failed to impress the audience.
C1 noun /ˈiːɡoʊˌtɪzəm/

egotism

Meaning
The practice of talking and thinking about oneself excessively because of an inflated sense of self-importance.
Example
His constant boasting revealed his egotism.
C1 noun /prəˈpoʊnənt/

proponent

Meaning
a person who advocates for or supports a particular idea, cause, or plan
Example
She is a strong proponent of renewable energy.
C1 noun /ɪmˌpɜː.sənˈeɪ.ʃən/

impersonation

Meaning
The action of pretending to be another person for the purpose of entertainment or fraud.
Example
Online impersonation is a serious cybercrime.
C1 adjective /ˈskrɔːni/

scrawny

Meaning
very thin and bony, often looking unhealthy
Example
The scrawny boy could barely lift the heavy bag.
C1 noun /ɪkˌsperɪˈmɛnteɪʃən/

experimentation

Meaning
The process of performing a scientific procedure to make a discovery, test a hypothesis, or demonstrate a known fact.
Example
Experimentation leads to groundbreaking products.
C1 adjective /ˈbɒt.əl ɡriːn/

Bottle-green

Meaning
a dark green color similar to that of a green glass bottle
Example
She wore a beautiful bottle-green dress to the evening party.
C1 noun /ˌmɪsˈdiːd/

Misdeed

Meaning
A wicked or illegal act; wrongdoing
Example
He regretted his past misdeeds and tried to make amends.
C1 adverb /ˈɒp.tɪ.məl.i/

optimally

Meaning
In the most effective or efficient way possible.
Example
Tasks should be allocated optimally for maximum output.
C1 noun /ˌtɛknɪˈkæləti/

technicality

Meaning
A small detail of law, rule, or procedure; a minor point that affects an outcome.
Example
The case was dismissed on a technicality.
C1 noun /ˈnɛkˌlaɪn/

neckline

Meaning
the edge of a garment around the neck, especially as cut to form a particular shape
Example
The dress has a beautiful V-shaped neckline.
C1 adjective /ˌɪn.səbˈstæn.ʃəl/

insubstantial

Meaning
Lacking strength, substance, or solidity.
Example
The evidence provided was insubstantial and unconvincing.
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 verb /rɪˈdʒɛnəreɪt/

regenerate

Meaning
to grow or produce again; to renew or restore
Example
The lizard can regenerate its lost tail.
C1 noun /ˈkɒnsəl/

consul

Meaning
an official appointed by a government to live in a foreign city and protect its citizens and interests there
Example
The consul assisted travelers who lost their passports.
C1 adjective /əˈbliːk/

Oblique

Meaning
slanting; diagonal; indirect or evasive
Example
The artist drew an oblique line across the canvas.
C1 verb /ˈɪtəreɪt/

iterate

Meaning
To repeat a process or statement, often to improve or refine.
Example
The software team will iterate the design until it meets user needs.
C1 noun /ˌɪn.dʒəˈnjuː.ɪ.ti/

ingenuity

Meaning
The quality of being clever, original, and inventive.
Example
His ingenuity led to groundbreaking innovations.
C1 noun ˈæ.sɛt ˌæl.əˈkeɪ.ʃən

asset allocation

Meaning
An investment strategy that aims to balance risk and reward by apportioning a portfolio's assets according to an individual's goals, risk tolerance, and investment horizon.
Example
Proper asset allocation is key to financial growth.
C1 verb /əbˈzɒlv/

absolve

Meaning
to free someone from blame, guilt, or responsibility; to pardon
Example
The priest absolved him of his sins.
C1 noun /əˌsæsɪˈneɪʃən/

assassination

Meaning
The act of killing someone important, often for political or ideological reasons.
Example
The assassination of the president shocked the nation.
C1 adjective /ˈhɪd.i.əs/

Hideous

Meaning
extremely ugly or unpleasant; causing shock or disgust
Example
The monster in the movie had a hideous appearance.
C1 noun /ˌɪntərˌɒpərəˈbɪləti/

interoperability

Meaning
The ability of computer systems or software to exchange and make use of information.
Example
The interoperability of different software systems ensures seamless workflow.
C1 noun /ɔːˈtɒkrəsi/

autocracy

Meaning
A system of government in which one person has absolute power.
Example
The country suffered under decades of autocracy.
C1 verb /ˈbrændɪʃ/

brandish

Meaning
to wave or flourish something, especially a weapon, in a threatening or showy way
Example
He brandished a sword to scare off the intruders.
C1 adjective /ʌnˈmɒdɪfaɪd/

unmodified

Meaning
not changed from its original form or state
Example
The data was used in its unmodified form for analysis.
C1 noun /ˌkɒŋɡrɪˈɡeɪʃən/

congregation

Meaning
a group of people assembled for religious worship or a common purpose
Example
The congregation gathered to hear the sermon.
C1 verb /əˈseɪl/

assail

Meaning
to attack violently, either physically or with words
Example
The politician was assailed with difficult questions.
C1 noun /mælˈpræktɪs/

Malpractice

Meaning
Improper, illegal, or negligent professional behavior
Example
The surgeon was sued for malpractice after the failed operation.
C1 noun /ˈtɛnəmənt/

tenement

Meaning
a large building divided into separate apartments, often in poor condition
Example
The family lived in a crowded tenement in the city.
C1 noun /ˈplæn.teɪn ˈflaʊ.ər/

Plantain flower

Meaning
The flower bud of a banana plant, used as a vegetable in cooking
Example
We cooked plantain flower curry for dinner.
C1 noun /ˈniːdəlwɜːrk/

needlework

Meaning
The craft of sewing, embroidery, or knitting done with a needle.
Example
Her grandmother taught her the art of needlework.
C1 noun /kwɪnˈtɛsəns/

quintessence

Meaning
The purest or most perfect example of something.
Example
She is the quintessence of elegance.
C1 verb /rɪˈbʌf/

rebuff

Meaning
to reject or refuse in a sharp or abrupt way
Example
She rebuffed his invitation to dinner.
C1 verb /ˈdæb.əl/

dabble

Meaning
To take part in an activity in a casual or superficial way.
Example
He dabbled in painting during his college days.
C1 noun /ˌæmplɪfɪˈkeɪʃən/

amplification

Meaning
the act or process of making something stronger, louder, or more intense; an expansion or elaboration of details
Example
The microphone provides amplification of the speaker’s voice.
C1 verb /daɪˈɡrɛs/

digress

Meaning
To leave the main subject temporarily in speech or writing.
Example
The professor began to digress from the main topic of the lecture.
C1 verb /fɔːˈbɛər/

forbear

Meaning
To refrain from doing something; to show patience or self-control.
Example
She forbore from commenting on his mistake.
C1 noun /əˈkuːstɪks/

acoustics

Meaning
the science of sound, or the properties of a space that affect how sound is heard
Example
The hall’s excellent acoustics made the orchestra sound rich and clear.
C1 noun, adjective /ˈrɛvərənd/

reverend

Meaning
A title of respect used for members of the clergy; deserving deep respect.
Example
The Reverend gave an inspiring sermon at the church.
C1 noun /ˌmʌltɪˈplɪsɪti/

multiplicity

Meaning
A large number or variety of something.
Example
The project faced a multiplicity of challenges.
C1 noun /ˈpærəˌlɛlɪzəm/

parallelism

Meaning
The state of being parallel or similar; in literature, the use of components in a sentence that are grammatically the same or similar in construction.
Example
The writer used parallelism to give rhythm to his prose.
C1 noun ˈsɪnədʒi

synergy

Meaning
The interaction or cooperation of two or more organizations, substances, or other agents to produce a combined effect greater than the sum of their separate effects.
Example
The synergy between the two companies led to a successful partnership.
C1 verb /kəˈrəʊd/

corrode

Meaning
to gradually destroy or wear away metal or other materials through chemical action
Example
The iron pipes corroded over time due to exposure to water.
C1 adjective /ɒmˈnɪv.ər.əs/

Omnivorous

Meaning
eating both plants and animals; feeding on various kinds of food
Example
Bears are omnivorous animals that eat both plants and meat.
C1 noun /ˈsɛntrɪˌfjuːdʒ/

centrifuge

Meaning
A machine that spins substances at high speed to separate different components.
Example
The lab technician used a centrifuge to separate the blood cells from the plasma.
C1 verb /ɪnˈɡroʊs/

engross

Meaning
to absorb all the attention or interest of someone
Example
She was so engrossed in the book that she forgot the time.
C1 noun /ˈsaɪ.ən/

scion

Meaning
a descendant of a wealthy, aristocratic, or influential family
Example
He is the scion of a wealthy industrialist family.
C1 noun /pəˈrɪfəri/

periphery

Meaning
The outer edge or boundary of an area or object.
Example
The soldiers were stationed at the periphery of the camp.
C1 noun /ˈəʊ.nəs/

onus

Meaning
A duty or responsibility, especially a heavy one.
Example
The onus is on the government to provide relief to the victims.
C1 noun /ˈlaɪtʃi/

Litchi

Meaning
a small oval pink-red tropical fruit with white translucent flesh and sweet taste
Example
The litchi has a rough pink shell that you peel to eat the sweet white fruit inside.
C1 noun /ˌdiː.kɒmpəˈzɪʃən/

decomposition

Meaning
the process of decaying or breaking down into simpler parts
Example
The decomposition of leaves enriches the soil.
C1 noun /krʌtʃ/

crutch

Meaning
a support used by someone injured to walk; also something relied upon for support or help
Example
He had to use crutches after breaking his leg.
C1 verb ɪˈluː.sɪ.deɪt

elucidate

Meaning
make (something) clear; explain.
Example
The professor elucidated the theory with simple examples.
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 verb /səbˈvɜːrt/

subvert

Meaning
to undermine or overthrow an established system, authority, or institution
Example
The rebels tried to subvert the government.
C1 adjective /ˌtɒpsi ˈtɜːvi/

topsy-turvy

Meaning
in a state of confusion, disorder, or upside down
Example
The sudden announcement left the office in a topsy-turvy state.
C1 verb /ɪkˈskriːt/

excrete

Meaning
to eliminate waste matter from the body
Example
Humans excrete carbon dioxide through breathing.
C1 noun /səˈlɛmnɪti/

solemnity

Meaning
the state or quality of being serious and dignified
Example
The ceremony was conducted with great solemnity.
C1 noun /ˈpær.ət biːk/

Parrot Beak

Meaning
a climbing plant with curved red and orange flowers resembling a parrot's beak
Example
The parrot beak flower's unique curved shape makes it a fascinating addition to any garden.
C1 adjective /ɪˈstiːmd/

Esteemed

Meaning
respected and admired; held in high regard
Example
He is an esteemed professor at the university.
C1 adjective /ʌnˈduː/

Undue

Meaning
excessive; inappropriate; more than is necessary or proper
Example
The teacher complained about undue pressure from parents.
C1 noun /fɔːn/

Fawn

Meaning
a young deer; a light yellowish-brown color
Example
The mother deer protects her fawn from predators.
C1 adjective /ɪnˈsɪdiəs/

insidious

Meaning
Proceeding in a gradual, subtle way but with harmful effects.
Example
The insidious spread of misinformation can damage trust.
C1 adjective /skəˈlæstɪk/

scholastic

Meaning
Relating to schools, education, or academic learning.
Example
The school organizes scholastic competitions every year.
C1 adjective /ɪmˈpɜːrsənl/

impersonal

Meaning
not influenced by, showing, or involving personal feelings; lacking human warmth or emotion
Example
The letter was written in a very impersonal style.
C1 noun /ˈdɛsɪˌbɛl/

decibel

Meaning
a unit used to measure the intensity of sound
Example
The noise level in the factory exceeded 90 decibels.
C1 adjective /ˈraʊ.di/

Rowdy

Meaning
disorderly; unruly; noisy and disruptive
Example
The rowdy children were making too much noise.
C1 adjective /ˈtʃɪə.ləs/

Cheerless

Meaning
lacking happiness or comfort; gloomy; depressing; without cheer
Example
The old house looked cheerless and abandoned in the winter rain.
C1 noun əˈtrɒs.ɪ.tiz

atrocities

Meaning
Extremely wicked or cruel acts, typically involving physical violence or injury.
Example
The atrocities shocked the international community.
C1 verb /ˈdʒɒsl/

jostle

Meaning
to push, elbow, or bump against someone roughly, typically in a crowd
Example
The fans jostled each other to get closer to the stage.
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 adjective /sliːk/

sleek

Meaning
smooth, shiny, and stylish
Example
She drove a sleek black sports car.
C1 adjective /ʌnˈweɪ.vər.ɪŋ/

unwavering

Meaning
Steady or resolute; not wavering.
Example
He showed unwavering dedication to his goal.
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 noun /ˈstɪmjʊlənt/

stimulant

Meaning
A substance that raises levels of physiological or nervous activity in the body.
Example
Coffee is a common stimulant that helps people stay awake.
C1 adverb /ˈhɒtli/

hotly

Meaning
in an intense, angry, or passionate way
Example
She hotly denied the accusations.
C1 noun /ˈlʌɡ.ɪdʒ væn/

Luggage van

Meaning
a vehicle designed for carrying luggage and cargo
Example
The luggage van carried all the passengers' suitcases.
C1 noun /ˈɪn.tə.mə.si/

Intimacy

Meaning
close familiarity or friendship; closeness; a private cozy atmosphere
Example
The couple valued the emotional intimacy they shared more than material possessions.
C1 noun /ˈpɛndənt/

pendant

Meaning
a piece of jewelry that hangs from a chain worn around the neck
Example
She wore a silver pendant around her neck.
C1 noun /ˌoʊvərprəˈdʌkʃən/

overproduction

Meaning
The act of producing more of something than is needed or can be consumed.
Example
The economic crisis was caused by the overproduction of goods.
C1 verb /ˈbæfəl/

baffle

Meaning
to confuse; to be too difficult to understand
Example
The math problem baffles me completely.
C1 noun ɪnˈsɒl.vən.si

insolvency

Meaning
The state of being unable to pay debts owed; bankruptcy.
Example
The company declared insolvency after years of losses.
C1 noun /prɪˈrɒɡətɪv/

prerogative

Meaning
a special right or privilege exclusive to a particular person or group
Example
It is the manager’s prerogative to make the final decision.
C1 noun /ˈzɪn.i.ə/

Zinnia

Meaning
A colorful garden flower with daisy-like blooms, popular for its vibrant colors and long-lasting nature
Example
The garden was filled with bright zinnias in various colors.
C1 noun /ˈnɔː.zi.ə/

Nausea

Meaning
a feeling of sickness with an inclination to vomit
Example
The motion of the boat caused severe nausea.
C1 adjective /kwɪər/

Queer

Meaning
strange; unusual; peculiar; odd
Example
The old house had a queer atmosphere that made visitors uncomfortable.
C1 verb /blɜːrt/

blurt

Meaning
to say something suddenly without thinking
Example
He blurts out the secret accidentally.
C1 adjective /ɪmˈpɛtʃ.u.əs/

impetuous

Meaning
Acting or done quickly and without thought or care; impulsive.
Example
His impetuous decision led to unexpected consequences.
C1 noun /rɪˈkluːs/

recluse

Meaning
A person who lives alone and avoids other people; someone who lives a solitary life.
Example
The old man lived as a recluse in the mountains.
C1 adjective /ɪˈlɪptɪkl/

elliptical

Meaning
Having the shape of an ellipse; also, a style of speech that is concise and sometimes obscure.
Example
The planet follows an elliptical orbit around the sun.
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 /ˈnep.ə.tɪz.əm/

Nepotism

Meaning
the practice of favoring relatives or friends in business or politics
Example
The company was accused of nepotism in its hiring practices.
C1 noun /tɪnt/

tint

Meaning
a slight shade or variation of a color
Example
The walls were painted white with a slight blue tint.
C1 noun /sɪˈdʌk.ʃən/

Seduction

Meaning
the action of seducing someone; temptation to do something wrong
Example
He fell victim to the seduction of easy money.
C1 noun /ˈpɔːr.kjə.paɪn/

Porcupine

Meaning
a large rodent with defensive spines or quills on its body
Example
The porcupine raised its quills when threatened.
C1 noun /təˈbuː/

taboo

Meaning
a social or cultural prohibition against certain practices or discussions
Example
Talking about money is considered a taboo in some cultures.
C1 noun /ˈskep.tɪ.sɪ.zəm/

skepticism

Meaning
A skeptical attitude; doubt as to the truth of something.
Example
His skepticism about new technology often makes him resistant to change.
C1 adjective /ˈpjuː.nɪ.tɪv/

punitive

Meaning
Inflicting or intended as punishment.
Example
The company faced punitive measures for violating the law.
C1 adjective /ˈsɛm.ɪ.nəl/

seminal

Meaning
Strongly influencing later developments; highly original and influential.
Example
His seminal book changed the course of modern philosophy.
C1 adjective /ɪnˈæk.tɪv/

Inactive

Meaning
not active; not working; dormant; idle
Example
The volcano has been inactive for over a century.
C1 adjective /ˈpælpəbl̩/

palpable

Meaning
easily perceived or felt; so intense as to seem almost tangible
Example
There was a palpable sense of excitement in the room.
C1 adjective /ˌɔːrnəˈmɛntl/

ornamental

Meaning
Serving as decoration; decorative rather than functional.
Example
The garden was filled with ornamental plants.
C1 adjective /ɪɡˈzæspəˌreɪtɪd/

exasperated

Meaning
greatly annoyed or irritated
Example
She gave him an exasperated look after his repeated mistakes.
C1 noun /dɪˈfjuːʒən/

diffusion

Meaning
the spreading of something more widely or the movement of particles from high to low concentration
Example
The diffusion of information on social media is rapid.
C1 adjective /ʌnˈkʌltʃəd/

Uncultured

Meaning
lacking good manners, refinement, or education; uncivilized
Example
His uncultured behavior embarrassed everyone at the dinner party.
C1 adjective /ˈtʌtʃi/

Touchy

Meaning
easily upset or offended; overly sensitive
Example
He's very touchy about his height.
C1 noun /joʊk/

Yoke

Meaning
a wooden crosspiece that is fastened over the necks of two animals and attached to a plow or cart; a burden or oppressive situation
Example
The oxen were joined by a wooden yoke.
C1 adjective /ˈviːnəs/

venous

Meaning
relating to the veins that carry blood to the heart
Example
The doctor examined the patient’s venous circulation.
C1 noun /ˈmedoʊ/

Meadow

Meaning
A piece of grassland, especially one used for hay
Example
The cows grazed peacefully in the green meadow.
C1 adjective /ˈblʌdləs/

bloodless

Meaning
without bloodshed; lacking violence or vitality
Example
The revolution was surprisingly bloodless.
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 /nʌdʒ/

nudge

Meaning
To push someone gently, usually with your elbow, in order to attract attention.
Example
She nudged him to be quiet during the meeting.
C1 noun /ɡəˈrɪlə/

guerrilla

Meaning
a member of a small independent group taking part in irregular fighting, typically against larger forces
Example
The guerrilla fighters used ambushes to attack enemy positions.
C1 adjective, noun /ˈmɑːrʃən/

martian

Meaning
Related to the planet Mars; or an imaginary being from Mars.
Example
The movie showed a Martian visiting Earth.
C1 noun /dɪn/

din

Meaning
a loud, unpleasant, and prolonged noise
Example
The din of traffic outside made it hard to concentrate.
C1 verb /ɪnˈfleɪm/

inflame

Meaning
to arouse strong feelings or provoke anger; to cause inflammation in the body
Example
The politician's remarks served to inflame public opinion.
C1 noun /ˈtɛmptər/

tempter

Meaning
a person or thing that entices someone into doing something wrong
Example
The tempter whispered false promises into his ear.
C1 noun /ˌævɒ̃ˈɡɑːrd/

avantgarde

Meaning
people or works that are innovative, experimental, and ahead of their time
Example
The avantgarde of the 20th century reshaped modern art.
C1 adjective /vɜːrˈboʊs/

verbose

Meaning
Using or expressed in more words than are needed; wordy.
Example
His verbose explanation confused the audience instead of clarifying the issue.