tranquilize
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C1 verb /ˈtræŋ.kwɪ.laɪz/

tranquilize

Meaning
to make someone or something calm or less anxious, often by using drugs
Example
The veterinarian had to tranquilize the tiger before moving it.
B2 noun /ˈhaɪəˌrɑːrki/

hierarchy

Meaning
A system in which people or things are arranged in levels of importance or authority.
Example
The corporate hierarchy determines who makes the final decision.
B2 noun /kɜːrv/

Curve

Meaning
a line or outline that gradually deviates from being straight; a bend or turn in a road or path
Example
The driver slowed down as he approached the sharp curve in the mountain road.
B2 noun /ˈɒs.trɪtʃ/

Ostrich

Meaning
a large flightless bird native to Africa with long legs and neck
Example
The ostrich is the world's largest bird.
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.
B1 verb /ˈwɪsəl/

whistle

Meaning
to make a high-pitched sound by blowing air through lips or teeth
Example
He likes to whistle while working.
C1 noun dɪˌzɝː.t̬ə.fɪˈkeɪ.ʃən

desertification

Meaning
The process by which fertile land becomes desert, typically as a result of drought, deforestation, or inappropriate agriculture.
Example
Deforestation accelerates desertification.
B1 adjective ˈsen.sɪ.tɪv

sensitive

Meaning
Quick to detect or respond to slight changes, signals, or influences.
Example
Sensitive systems require precise handling.
C2 noun /ˈsɛm.ɪ.nɛr.i/

seminary

Meaning
A school or college for training priests, ministers, or rabbis.
Example
He decided to enroll in a seminary to study theology.
A1 verb /klɪr/

clear

Meaning
to remove obstructions; to make clean or transparent
Example
Please clear the table after dinner.
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.
B2 noun ˈbaɪ.əʊˌfjuː.əl

biofuel

Meaning
A fuel derived immediately from living matter, as opposed to fossil fuels derived from long-dead biological matter.
Example
Biofuels reduce dependence on conventional energy sources.
B2 adjective /ʌnˈɡreɪt.fəl/

Ungrateful

Meaning
not feeling or showing thanks for something done or given; not appreciating kindness
Example
She felt he was ungrateful for all the help she had given him.
C1 noun /ˈɛstjʊəri/

estuary

Meaning
the tidal mouth of a large river, where the tide meets the stream
Example
The city is located near the estuary of the river.
B1 adjective /ˈtʃaɪl.dɪʃ/

Childish

Meaning
immature and silly; behaving in a way that is typical of a child but inappropriate for an adult
Example
His childish behavior during the meeting was quite embarrassing.
C1 adjective/noun nɪˈmɒn.ɪk

mnemonic

Meaning
Assisting or intended to assist memory; a device or technique to aid memory.
Example
A mnemonic device helps students remember complex concepts.
C2 noun/verb /ˈsoʊdʒɜrn/

sojourn

Meaning
A temporary stay at a place; to stay temporarily
Example
She enjoyed a brief sojourn in Paris during the summer.
B2 adjective /ˈnoʊ.ɪŋ/

Knowing

Meaning
showing awareness or understanding; perceptive; shrewd
Example
She gave him a knowing smile when he mentioned the secret.
B2 noun /ˈdræɡ.ən.flaɪ/

Dragon-fly

Meaning
a large insect with four transparent wings that lives near water
Example
The dragonfly hovered over the pond.
B1 noun /ˈdaɪ.ə.lɑːɡ/

Dialogue

Meaning
a conversation between two or more people; discussion aimed at exploration of a subject
Example
The political leaders engaged in meaningful dialogue to resolve the conflict.
A2 noun /ˈpɑːswɜːd/

password

Meaning
a secret word or phrase used to gain access to something
Example
Make sure your password is strong and unique.
C2 noun /ˈhɛptəˌɡɒn/

heptagon

Meaning
A polygon with seven sides and seven angles.
Example
The math teacher drew a heptagon on the board.
A1 adjective /ɡʊd/

Good

Meaning
satisfactory; pleasant; beneficial; of high quality
Example
She is a good student.
C1 noun /əˈkɔːrdiən/

accordion

Meaning
a musical instrument played by squeezing and expanding with keys and buttons
Example
The musician played a cheerful tune on the accordion.
C1 noun ɪˌməʊ.ʃəˈnæl.ɪ.ti

emotionality

Meaning
The quality of being driven by emotions rather than reason; emotional responsiveness.
Example
His emotionality often influenced his decisions.
C1 adjective /ˈɪntrɪkət/

intricate

Meaning
very detailed, complex, and difficult to understand
Example
The artist created an intricate pattern on the wall.
C2 adjective /ˌlækəˈdeɪzɪkəl/

lackadaisical

Meaning
lacking enthusiasm, energy, or determination; careless or lazy
Example
His lackadaisical attitude toward work annoyed his boss.
B2 noun /ˈboʊld.nəs/

Boldness

Meaning
willingness to take risks; confidence and courage in behavior
Example
Her boldness in confronting the problem impressed everyone.
C1 noun /krɛst/

crest

Meaning
the top of a hill, wave, or mountain; a symbol of identity
Example
The hikers reached the crest of the mountain at sunrise.
B2 noun /ˈsɪmptəm/

symptom

Meaning
a sign or indication of something, especially of an illness
Example
Fever is a common symptom of the flu.
B2 adjective /dɛns/

dense

Meaning
Closely compacted in substance; having parts crowded together.
Example
The forest was so dense that little sunlight reached the ground.
B1 verb /ˈwɪspər/

whisper

Meaning
to speak very softly using one's breath without vocal cords
Example
She whispered a secret in my ear.
C1 verb /ˈsɛvər/

sever

Meaning
to cut off or separate, especially by cutting; to end a connection or relationship
Example
He had to sever ties with the company after the dispute.
C2 noun /ˌoʊpəˈlɛsəns/

opalescence

Meaning
a milky or pearly appearance of a surface like that of an opal
Example
The pearl had a gentle opalescence under the light.
B1 noun /skriːn/

Screen

Meaning
a flat surface on which pictures or words are shown; a movable partition used to divide a room
Example
The movie was displayed on a large screen in the theater.
B2 noun, verb /slænt/

slant

Meaning
A particular point of view; to slope or lean in a particular direction.
Example
The article had a political slant.
C2 noun /ɪnˈtɜːrmənt/

interment

Meaning
The act of burying a dead body in a grave or tomb.
Example
The interment took place at the family cemetery.
A2 noun ˈprɒdʒekt

project

Meaning
An individual or collaborative enterprise that is carefully planned to achieve a particular aim
Example
Working on two projects simultaneously is difficult.
C1 noun /noʊˈteɪʃən/

notation

Meaning
A system of symbols or signs used to represent information, especially in mathematics or music.
Example
The teacher explained the notation used in the algebra equations.
C1 adjective ləˈθɑːrdʒɪk

lethargic

Meaning
Being inactive due to lack of physical or mental energy
Example
After a heavy meal, he felt lethargic and sleepy.
C1 noun /kwɪnˈtɛt/

quintet

Meaning
A group of five people or things, especially musicians.
Example
The jazz quintet performed beautifully.
B2 noun /biːt/

Beet

Meaning
a plant with a round dark red root that is eaten as a vegetable
Example
Roasted beet with goat cheese makes a delicious salad.
A1 noun /ˈbɪldɪŋ/

building

Meaning
A structure with a roof and walls, such as a house, school, or office.
Example
The old building was renovated into a museum.
C1 verb bɪˈkwiːð

bequeath

Meaning
Leave something to someone in a will; pass down or hand down to the next generation.
Example
The scientist bequeathed his research papers to the university.
C1 adjective /dɪˈraɪsɪv/

derisive

Meaning
Expressing contempt or ridicule.
Example
She gave a derisive laugh at his attempt to sing.
C1 noun /ˈprɒk.tər/

proctor

Meaning
a person who supervises students during an examination
Example
The proctor reminded students to keep their phones switched off.
C1 adjective /ɪnˈveə.ri.ə.bəl/

Invariable

Meaning
never changing; constant; always the same
Example
His invariable routine includes morning exercise and coffee.
C1 noun /ˈræʃən/

ration

Meaning
a fixed amount of something, especially food, officially allowed to each person
Example
During the war, each family received a weekly ration of rice.
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.
C1 noun /ˌdiːˈmer.ɪt/

Demerit

Meaning
a fault or disadvantage; a mark given for a fault or offense
Example
The student received a demerit for arriving late to class repeatedly.
B2 verb /trænzˈmɪt/

transmit

Meaning
to send or pass something from one place or person to another
Example
The antenna can transmit signals over a long distance.
C2 noun /ˈkɪldʒɔɪ/

killjoy

Meaning
a person who spoils the fun or enjoyment of others
Example
Don’t be a killjoy at the party.
C2 noun /ˈpɛrɪstaɪl/

peristyle

Meaning
A continuous porch formed by a row of columns surrounding the perimeter of a building or courtyard.
Example
The Roman villa featured a beautiful peristyle garden.
B2 noun /sərˈvaɪvər/

Survivor

Meaning
a person who survives, especially a person remaining alive after an event in which others have died
Example
She is a cancer survivor who now helps other patients.
B1 noun /kəmˈpɛtɪtər/

competitor

Meaning
a person, team, or company that competes with others
Example
The company lowered its prices to beat its main competitor.
B2 adverb /ˈbəʊld.li/

Boldly

Meaning
in a confident and brave way; without fear
Example
She boldly stepped forward to face the challenge.
C2 verb /ˈmiːliəˌreɪt/

meliorate

Meaning
To make something better or improve a condition.
Example
The new policies aim to meliorate the living conditions of the poor.
B2 noun /ˈfluː.ən.si/

fluency

Meaning
The ability to speak or write a language smoothly and effortlessly.
Example
She speaks English with remarkable fluency.
C2 verb /ˈɡrʌvəl/

grovel

Meaning
To act in an excessively humble or submissive way to gain favor.
Example
He groveled before his boss to avoid punishment.
C1 noun /ˈɡʌnˌpaʊdər/

Gunpowder

Meaning
explosive powder used in guns and fireworks
Example
Gunpowder was invented in ancient China.
C2 noun /ˈdəʊ.lər/

dolor

Meaning
A state of great sorrow or distress.
Example
The nation was in deep dolor after the tragedy.
B2 adjective + noun æmˈbɪʃəs ɪnˈdevər

ambitious endeavor

Meaning
A bold and determined attempt to achieve something challenging.
Example
Artemis is an ambitious endeavor in space exploration.
C1 adjective /ˌʌnˈpɑr.də.nə.bəl/

Unpardonable

Meaning
too bad to be forgiven; inexcusable
Example
His betrayal of trust was an unpardonable offense.
C2 noun /niːˈɒlədʒɪzəm/

neologism

Meaning
A newly coined word or expression.
Example
The internet has given rise to many neologisms like 'selfie' and 'hashtag'.
C2 adjective /ˌstætʃuˈɛsk/

statuesque

Meaning
Having the grace, beauty, or dignity of a statue; tall and attractively proportioned.
Example
She had a statuesque figure that turned heads wherever she went.
C2 noun /məˈlæsɪz/

Molasses

Meaning
thick, dark, sweet syrup made from sugar cane
Example
The recipe calls for molasses to give the bread a rich flavor.
C1 noun /ˈmɒnəˌθiːɪzəm/

monotheism

Meaning
The belief in the existence of only one God.
Example
Islam and Christianity are religions based on monotheism.
B1 verb /dɪˈfaɪn/

define

Meaning
to explain the meaning of a word, phrase, or concept clearly
Example
The teacher asked the student to define the word 'democracy'.
C2 verb /ˈwɔːbəl/

warble

Meaning
To sing or whistle with a quavering voice or with trills.
Example
The bird warbled a sweet tune in the morning.
B2 noun, verb /dɪˈfɔːlt/

default

Meaning
failure to fulfill an obligation, especially to repay a loan
Example
The company defaulted on its loan payments.
B2 noun/verb /ɡʌt/

gut

Meaning
The stomach or belly; also used for courage, instinct, or to remove the inside of something.
Example
He had the guts to stand up for his beliefs.
A1 noun, verb /baɪk/

bike

Meaning
a bicycle or motorcycle; to ride a bicycle
Example
He biked to school every day.
B2 adverb /ˈʌt.ə.li/

Utterly

Meaning
completely; absolutely; totally
Example
The movie was utterly boring and I fell asleep.
B2 noun /ˈbɒmər/

Bomber

Meaning
military aircraft designed to drop bombs on targets
Example
The bomber squadron flew over the city at dawn.
B2 noun /ˌɛvəˈluːʃən/

evolution

Meaning
the gradual development of something, especially from a simple to a more complex form
Example
The theory of evolution explains how species change over time.
B1 verb /kəˈmænd/

command

Meaning
to give an order authoritatively; to control or direct
Example
The general commanded the soldiers to move forward.
B2 noun /ˈsɪr.i.əs.nəs/

Seriousness

Meaning
the quality of being serious; gravity; importance
Example
The seriousness of the situation became clear when the doctor spoke.
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.
C2 adjective /ˈlaɪðsəm/

lithesome

Meaning
gracefully flexible and supple
Example
Her lithesome figure allowed her to move like a ballerina.
B2 noun /ɡʌlf/

Gulf

Meaning
a deep inlet of the sea almost surrounded by land; a wide gap or difference between people or groups
Example
The Persian Gulf is an important waterway for international shipping and oil transport.
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.
A2 noun /fiːld/

field

Meaning
an area of open land, often used for farming, sports, or scientific study
Example
The children played football in the field.
A1 noun /suːp/

Soup

Meaning
a liquid food made by boiling meat, vegetables, or other ingredients in water
Example
I had a bowl of chicken soup for lunch.
C2 noun /ˈbuː.jɒ̃/

bouillon

Meaning
A clear, seasoned broth made by simmering meat, fish, or vegetables in water.
Example
She added vegetables to the bouillon for extra flavor.
B1 noun /kənˌsɪdəˈreɪʃən/

consideration

Meaning
careful thought or attention to something before making a decision
Example
After much consideration, she accepted the job offer.
A2 adjective /kənˈsɜːnd/

concerned

Meaning
worried or anxious about something; involved or interested in something
Example
She was concerned about her mother's health.
B1 noun /səˈlɛbrɪti/

celebrity

Meaning
a famous person, especially in entertainment or sports
Example
The celebrity was surrounded by fans at the airport.
B2 noun /ˈhɔːrmoʊn/

hormone

Meaning
a chemical substance produced in the body that influences how the body grows or functions
Example
Insulin is a hormone that controls blood sugar levels.
B2 adjective /boʊld/

Bold

Meaning
brave; confident; daring
Example
He made a bold decision to start his own business.
B2 noun /æmˈbæsədər/

Ambassador

Meaning
an accredited diplomat sent by a country as its official representative to a foreign country
Example
The ambassador met with government officials to discuss trade agreements.
C2 noun /ˌhjuː.mɪ.fɪˈkeɪ.ʃən/

humification

Meaning
The process of organic matter decomposition to form humus in soil.
Example
Humification enhances soil structure and fertility.
C2 adjective /juːˈnɪsənənt/

unisonant

Meaning
Sounding together or in harmony.
Example
The unisonant voices created a powerful effect.
B1 noun /hel/

Hell

Meaning
a place regarded in various religions as a spiritual realm of evil and suffering; an extremely unpleasant experience
Example
Working in the factory during summer was absolute hell due to the extreme heat.
B2 noun /ˈbjʊəroʊ/

bureau

Meaning
An office or agency that provides services or manages specific duties.
Example
The travel bureau helped them plan their vacation.
C1 noun /trænsˈɡrɛʃən/

transgression

Meaning
an act that goes against a law, rule, or code of conduct; a violation or sin
Example
The court forgave his first transgression but warned him not to repeat it.
B2 noun /rɪˈsɛs/

recess

Meaning
A short break from work or school; also a small space set back in a wall.
Example
The children played outside during recess.
C1 noun ˈfɜːr.vɚ

fervor

Meaning
Strong passion or enthusiasm for something.
Example
He spoke with great fervor about his vision for the company.
C2 adjective /ˈsæpɪd/

sapid

Meaning
Having a pleasant taste; flavorful.
Example
The chef prepared a sapid dish that delighted everyone at the table.
B1 noun /ˈnɜːrsɪŋ/

nursing

Meaning
the profession or practice of caring for the sick or injured
Example
She is studying nursing to become a healthcare professional.
C1 adjective /ˌæprɪˈhɛnsɪv/

apprehensive

Meaning
feeling anxious or fearful that something bad will happen
Example
He was apprehensive about starting a new job in a foreign country.
B2 adjective /ˈtɒlərənt/

tolerant

Meaning
Showing willingness to allow the existence of opinions or behaviors that one dislikes or disagrees with.
Example
He is very tolerant of other people's beliefs.
C2 adjective /ʌnˈflæpəbəl/

unflappable

Meaning
calm and composed, especially in difficult situations
Example
Despite the crisis, he remained unflappable and confident.
C2 noun /ˌdʒerənˈtɑːkrəsi/

gerontocracy

Meaning
A system of government or control by old people.
Example
The country was seen as a gerontocracy, dominated by elderly leaders.
C2 adjective /ɪkˈskɜːsɪv/

excursive

Meaning
Tending to digress or wander; moving away from the main subject.
Example
His excursive lecture left the students confused about the main topic.
C1 noun /ˌɪntərˈdʒɛkʃən/

interjection

Meaning
a word or phrase used to express sudden emotion or reaction, often standing alone
Example
Words like 'wow' and 'ouch' are common interjections in English.
C1 noun/adjective ˈflɛdʒ.lɪŋ

fledgling

Meaning
New, inexperienced, newly established.
Example
The fledgling startup needs investment.
C2 noun /ɪɡˈzækʃən/

exaction

Meaning
the act of demanding or obtaining something, especially unfairly
Example
The peasants suffered under the king's heavy exactions.
B1 verb /ˈɡɑːsɪp/

gossip

Meaning
to talk about other people's private lives, often in an unkind way
Example
They love to gossip about their neighbors.
B1 adjective /ˈtrʌbəld/

troubled

Meaning
experiencing or showing distress, anxiety, or worry
Example
He looked deeply troubled after hearing the bad news.
C1 noun /ˈkærət/

karat

Meaning
A unit for measuring the purity of gold, with 24 karats being pure gold.
Example
The ring was made of 18-karat gold.
C1 adjective ˈeɪlɪəneɪtɪd

alienated

Meaning
Feeling isolated or estranged; disconnected from others or society.
Example
Alienated students are more prone to delinquency.
C2 noun /ˌɪn.ʌnˈdeɪ.ʃən/

inundation

Meaning
The act of flooding or overwhelming with water or things.
Example
The town suffered from a severe inundation after the heavy rains.
C2 noun /ˈpɪnjən/

pinion

Meaning
a small gear or the outer part of a bird's wing; to restrain or immobilize
Example
The bird's pinion was injured, preventing it from flying.
C2 noun /ˈmæsəkɪst/

masochist

Meaning
a person who derives pleasure from their own pain or humiliation
Example
He was called a masochist for enjoying tough challenges.
A2 noun /dɪˈziːz/

disease

Meaning
An illness or medical condition that affects the body or mind.
Example
The doctor is researching a cure for the disease.
B2 adjective /slaɪ/

sly

Meaning
Clever in a deceitful or cunning way.
Example
She gave him a sly smile.
C1 adjective /ˈmæn.li/

Manly

Meaning
having qualities traditionally associated with men; brave; courageous
Example
He showed manly courage during the crisis.
A1 adjective /taɪəd/

Tired

Meaning
feeling exhausted; in need of sleep or rest
Example
I am too tired to continue working.
B1 noun /tʃuˈɪʃ.ən/

tuition

Meaning
the fee for instruction or teaching, typically at a school or university
Example
The tuition for the college has increased this year.
C1 noun /ˈkɑːrtrɪdʒ/

cartridge

Meaning
A container holding a substance or device, such as ink for printers or bullets for firearms.
Example
The printer stopped working because the ink cartridge was empty.
B1 noun/verb /ˈhʌntɪŋ/

hunting

Meaning
the activity of chasing and killing wild animals
Example
Hunting is strictly regulated in many countries.