resource-efficient
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C1 adjective /rɪˈsɔːrs ɪˈfɪʃ.ənt/

resource-efficient

Meaning
Using resources in a way that minimizes waste and maximizes productivity.
Example
Resource-efficient farming conserves water and energy.
C1 verb /ˈlʌmbər/

lumber

Meaning
to move in a slow, heavy, awkward way
Example
The bear lumbered through the forest in search of food.
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 verb /daɪˈvɜːrdʒ/

diverge

Meaning
to separate and go in different directions; to differ
Example
The two paths diverge at the fork in the road.
C1 noun /əˈfen.dər/

Offender

Meaning
a person who commits an illegal act; someone who breaks the law
Example
The young offender was sentenced to community service.
C1 verb /ʌnˈmɑːsk/

unmask

Meaning
to remove a mask or covering; to reveal the true identity, nature, or intentions of someone or something
Example
The investigation helped unmask the real culprit behind the crime.
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 noun /ˈhɒrəˌskoʊp/

horoscope

Meaning
A forecast of a person's future based on the positions of the stars and planets at their birth.
Example
She read her horoscope every morning to see what the stars predicted.
C1 noun /strəˈtiː.dʒɪk ˈɪn.saɪts/

strategic insights

Meaning
Deep understanding and wisdom gained through careful analysis for planning purposes.
Example
Strategic insights guide policymaking.
C1 adjective /əˈmiːnəbl/

amenable

Meaning
willing to cooperate or be influenced; open to suggestions
Example
She was amenable to the idea of working longer hours.
C1 verb /riːˈpeɪ.tri.eɪt/

repatriate

Meaning
To return someone to their own country, often after war or imprisonment.
Example
The government worked to repatriate the refugees safely.
C1 noun /ˌpænəˈsiːə/

panacea

Meaning
A solution or remedy for all difficulties or diseases.
Example
Education is often seen as a panacea for social problems.
C1 adjective /ˈplɒd.ɪŋ/

plodding

Meaning
slow-moving and unexciting; showing steady effort
Example
The movie was entertaining but a bit plodding in the middle.
C1 noun /ˈkoʊtʃ.mən/

Coachman

Meaning
a person who drives a horse-drawn carriage or coach
Example
The coachman skillfully guided the horses through the busy streets.
C1 noun /əˈluːʒən/

allusion

Meaning
An indirect reference to something without mentioning it explicitly.
Example
Her story contained an allusion to a famous myth.
C1 adjective /ˈsɔːrdɪd/

sordid

Meaning
involving immoral or dishonorable actions; dirty or unpleasant
Example
The newspaper exposed the politician's sordid past.
C1 verb /ʌnˈroʊl/

unroll

Meaning
to open something that is rolled up; to spread out gradually
Example
She unrolled the map on the table to find the route.
C1 noun ˈredʒ.ɪ.strɑːr

registrar

Meaning
An official responsible for keeping records or registers.
Example
The registrar oversees all administrative tasks.
C1 verb /ʃɪə/

shear

Meaning
to cut the wool off a sheep or to cut something with sharp tools like scissors or shears
Example
The farmer will shear the sheep in the spring.
C1 verb /ˈænɪmeɪt/

animate

Meaning
to bring to life or make lively; to create animation for films or cartoons
Example
The artist will animate the characters for the movie.
C1 noun, verb /spreɪn/

sprain

Meaning
an injury to a joint in which the ligaments are stretched or torn
Example
She sprained her ankle while running in the park.
C1 noun /kəˈθɑːrsɪs/

catharsis

Meaning
The process of releasing strong emotions, providing relief.
Example
Writing in her diary was a form of catharsis for her.
C1 noun /pəˈrɪm.ɪ.tər/

perimeter

Meaning
the continuous line forming the boundary of a closed geometric figure or area
Example
The soldiers guarded the perimeter of the camp.
C1 noun /ɪmˈpjʊərəti/

impurity

Meaning
the state of being unclean or contaminated; a substance that makes something impure
Example
The scientist removed every impurity from the water sample.
C1 adjective vəˈreɪ.ʃəs

voracious

Meaning
Having a very eager approach to an activity; wanting or devouring great quantities of food or having an insatiable appetite.
Example
He has a voracious appetite for knowledge.
C1 noun /fiːnd/

fiend

Meaning
an evil spirit or demon; a wicked or cruel person; someone obsessed with a particular thing
Example
He is a real fiend when it comes to solving puzzles.
C1 verb /wɛt/

whet

Meaning
To sharpen the blade of a tool or to stimulate interest or appetite.
Example
The smell of food whetted my appetite.
C1 adjective /ˈtɪklɪʃ/

ticklish

Meaning
easily made to laugh by being touched lightly; easily upset or sensitive
Example
She is very ticklish and bursts into laughter when touched on her feet.
C1 verb /ˈstriːmlaɪnɪŋ/

streamlining

Meaning
The process of making an organization or system more efficient by simplifying or eliminating unnecessary steps
Example
Streamlining processes can significantly reduce operational costs.
C1 verb /ˈræn.sæk/

ransack

Meaning
to search a place roughly and steal or damage things
Example
Burglars ransacked the house while the family was away.
C1 noun /ˈfʊtˌnoʊt/

foot-note

Meaning
A note of reference, explanation, or comment placed at the bottom of a page.
Example
The author included a foot-note to explain the historical context.
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 verb /ˈviːtoʊ/

veto

Meaning
to reject or forbid a decision, proposal, or law
Example
The president decided to veto the new bill.
C1 adjective /ɪˈnɔːɡjərəl/

Inaugural

Meaning
marking the beginning of something; first; opening
Example
The president delivered his inaugural speech.
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 /ˈnɔːrməlsi/

normalcy

Meaning
The condition of being normal; a return to usual or expected conditions.
Example
After the flood, the town struggled to regain a sense of normalcy.
C1 noun /ˈæmplɪtjuːd/

amplitude

Meaning
the maximum extent of a vibration or oscillation, or the size of something
Example
The amplitude of the earthquake was measured on the Richter scale.
C1 noun/verb /stæmˈpiːd/

stampede

Meaning
A sudden, uncontrolled rush of people or animals; to cause a mass movement.
Example
The loud noise caused a stampede of the crowd.
C1 verb /rɪˈdʒɛnəreɪt/

regenerate

Meaning
to grow or produce again; to renew or restore
Example
The lizard can regenerate its lost tail.
C1 adjective ˈɑː.dʒu.əs

arduous

Meaning
Involving or requiring strenuous effort; difficult and tiring.
Example
The trek through the mountains was an arduous journey.
C1 noun /oʊθ/

Oath

Meaning
a solemn promise or declaration; a sworn statement
Example
The doctor took an oath to help patients.
C1 verb, noun /dɪsˈkrɛdɪt/

discredit

Meaning
To harm the reputation of someone or something; loss of respect or credibility.
Example
The scandal discredited the politician in the eyes of the public.
C1 adjective sɪˈmæn.tɪk

semantic

Meaning
Related to meaning in language; concerning the interpretation of words and sentences.
Example
AI models use semantic analysis to understand context.
C1 adjective ɪnˈtrɪn.zɪk

intrinsic

Meaning
Belonging naturally; essential. Existing as a natural or basic part of something.
Example
Creativity is an intrinsic quality of a great artist.
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 /əˈboʊd/

abode

Meaning
a place of residence; a home
Example
They invited us to their humble abode.
C1 verb /rɪˈfjuːt/

refute

Meaning
To prove a statement, argument, or theory to be false or invalid.
Example
The lawyer refuted the witness's testimony with solid evidence.
C1 noun /kɑːrˈtɒɡrəfər/

cartographer

Meaning
A person who makes maps.
Example
The cartographer carefully drew the map of the new territory.
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 /læʃ/

Lash

Meaning
an eyelash; a sharp blow with a whip or rope; to strike forcefully
Example
She carefully applied mascara to make her lashes look longer and darker.
C1 adjective /ˈraʊzɪŋ/

rousing

Meaning
Exciting, inspiring, or stirring.
Example
The speaker delivered a rousing speech that moved the audience.
C1 noun ˈælərdʒən

allergen

Meaning
A substance that causes an allergic reaction.
Example
Pollen is a common allergen that affects many people.
C1 noun /naɪˈiːvɪti/

naivety

Meaning
The quality of being innocent, simple, and lacking experience or sophistication.
Example
Her naivety made her trust people too easily.
C1 verb /ˈluːbrɪkeɪt/

lubricate

Meaning
to apply oil or grease to reduce friction between surfaces
Example
The mechanic lubricated the car engine parts.
C1 noun /ˈlɔː.meɪ.kər/

Lawmaker

Meaning
a person who writes and passes laws, especially a member of a legislative body
Example
The lawmakers voted on the new education bill.
C1 noun /əˈtrɑːsəti/

atrocity

Meaning
an extremely cruel or violent act, often involving physical violence
Example
The world condemned the atrocity committed against civilians.
C1 verb /ˈɛkˌsaɪz/

excise

Meaning
to cut out or remove completely, often by surgery
Example
The surgeon excised the tumor successfully.
C1 noun /ˈledʒ.ər/

Ledger

Meaning
a book or other collection of financial accounts of a particular type
Example
The accountant updated the company ledger daily.
C1 adjective kəʊˈhiː.sɪv

cohesive

Meaning
Characterized by or causing cohesion; forming a united whole.
Example
The team displayed a cohesive strategy.
C1 verb /ˈkwɪvər/

quiver

Meaning
To tremble or shake with slight but rapid motion.
Example
Her lips began to quiver as she tried not to cry.
C1 adjective ˈriːdʒən spəˈsɪfɪk

region-specific

Meaning
Relating to or characteristic of a particular region or area.
Example
Climate change impacts are region-specific.
C1 noun /rɪˈmɔːrs/

Remorse

Meaning
deep regret or guilt for a wrong committed; bitter regret for something done
Example
He felt deep remorse for his actions.
C1 adverb /ˈmɪdweɪ/

Midway

Meaning
halfway; at or to the middle point
Example
The project is midway through completion.
C1 noun /ˈken.əl/

Kennel

Meaning
a small shelter for a dog; an establishment for the breeding or boarding of dogs
Example
The dog slept comfortably in his wooden kennel in the backyard.
C1 phrase lɪˈdʒɪt.ɪ.mət sɛlf dɪˈfens

legitimate self-defense

Meaning
Lawful protection of oneself from harm or attack.
Example
The country claimed it was legitimate self-defense.
C1 noun/verb /ˈhɛrəld/

herald

Meaning
A person or thing that announces or signals the approach of something; to announce or signal.
Example
The blooming flowers herald the arrival of spring.
C1 noun /ˈkæləs/

callus

Meaning
A thickened and hardened part of the skin or soft tissue, especially in an area subjected to friction.
Example
A callus formed on his palm from using tools every day.
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 /ˈnɑv.ɪs/

Novice

Meaning
a person new to or inexperienced in a field or situation; a beginner
Example
As a novice driver, she was very careful on the road.
C1 verb /ɡrʌnt/

grunt

Meaning
to make a low, rough sound, often when exerting effort or expressing annoyance
Example
He grunted as he lifted the heavy box.
C1 noun /ˈfjʊərɔːr/

furor

Meaning
An outbreak of public anger or excitement.
Example
The politician's remarks created a furor in the media.
C1 noun /fjuːd/

feud

Meaning
a prolonged and bitter quarrel or conflict, often between families or groups
Example
The two families have been in a feud for generations.
C1 adjective /ɪˈleɪtɪd/

elated

Meaning
Extremely happy and excited.
Example
She was elated when she heard the good news.
C1 noun /weɪ/

Whey

Meaning
the watery part of milk that separates from the curds when making cheese
Example
Whey protein is popular among athletes and bodybuilders.
C1 noun /ˈrɛnɪˌɡeɪd/

renegade

Meaning
a person who deserts or betrays an organization, country, or principles
Example
He was labeled a renegade after leaving the party and criticizing its policies.
C1 noun /səˈvænə/

savanna

Meaning
a grassy plain with scattered trees, typical of tropical and subtropical regions
Example
Giraffes browsed on acacia trees across the wide savanna.
C1 adjective /ɪnˈtrɛntʃt/

entrenched

Meaning
Firmly established and unlikely to change.
Example
Corruption is deeply entrenched in the system.
C1 noun /ˈwɒndərlʌst/

wanderlust

Meaning
A strong desire to travel and explore the world.
Example
Her wanderlust took her to every corner of the globe.
C1 noun /ˌfəʊtəʊˈsɪnθɛtɪk ɪˈfɪʃənsi/

photosynthetic efficiency

Meaning
The measure of how effectively plants convert light energy into chemical energy through the process of photosynthesis, directly affecting plant growth and crop yield.
Example
Improving photosynthetic efficiency can increase crop yields.
C1 verb /ˈstaɪfl/

stifle

Meaning
to prevent or restrain an action, idea, or emotion; to suffocate
Example
She tried to stifle a laugh during the serious meeting.
C1 adjective /ɔːˈtɒn.ə.məs/

autonomous

Meaning
Acting independently or having the freedom to do so.
Example
Autonomous systems ensure greater precision.
C1 noun /məˈtɪəriəlɪzəm/

Materialism

Meaning
A tendency to consider material possessions more important than spiritual values
Example
The rise of materialism in modern society concerns many philosophers.
C1 adjective /ɪmˈpjʊər/

Impure

Meaning
contaminated; not clean; mixed with foreign substances
Example
The impure water caused health problems in the village.
C1 adjective /dɪsˈsɪmɪlər/

dissimilar

Meaning
Not alike; different.
Example
Though they are twins, their personalities are dissimilar.
C1 noun ɪˈpɪf.ə.ni

epiphany

Meaning
A moment of sudden revelation or insight.
Example
He had an epiphany about his true purpose in life.
C1 adjective /həˈred.ɪ.ter.i/

Hereditary

Meaning
passed down through family genes; inherited from ancestors
Example
The hereditary disease was passed down through generations.
C1 adjective /ˈdɪn.dʒi/

Dingy

Meaning
dark and dirty; gloomy; dull in color
Example
The old building had dingy walls that needed painting.
C1 adverb /ˈwɪmzɪkli/

Whimsically

Meaning
In a playful, fanciful, or capricious manner; with sudden changes of mind
Example
She decorated her room whimsically with colorful balloons.
C1 noun /ˌɪndɪɡˈneɪʃən/

indignation

Meaning
Strong displeasure or anger caused by something unjust, offensive, or insulting.
Example
Public indignation grew after the unfair verdict.
C1 noun ˈæltruɪzəm

altruism

Meaning
The belief in or practice of disinterested and selfless concern for the well-being of others.
Example
His altruism motivated others to volunteer.
C1 noun /ˈdɪɡnɪˌtɛri/

dignitary

Meaning
a person considered to be important because of high rank or office
Example
Several foreign dignitaries attended the state banquet.
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 /ˌdep.rɪˈveɪ.ʃən/

deprivation

Meaning
The damaging lack of material benefits considered to be basic necessities in a society.
Example
Sleep deprivation affects cognitive function.
C1 verb, noun /ˈɡrɪməs/

grimace

Meaning
to make an ugly, twisted expression on one's face, usually in disgust or pain
Example
He grimaced when he tasted the sour fruit.
C1 noun ˈiː.pɒk

epoch

Meaning
A period of time in history or a person's life, typically one marked by notable events or particular characteristics.
Example
The invention of the internet marked a new epoch in human history.
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 ɪˈluːd

elude

Meaning
Evade or escape from, typically in a skillful or cunning way; avoid being caught.
Example
The thief managed to elude the police.
C1 adjective /ɪmˈpæʃənd/

impassioned

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

quash

Meaning
To reject or void something legally or to put an end to something forcefully.
Example
The court quashed the decision due to lack of evidence.
C1 noun ˌsɪs.təˈmæt.ɪk ˈstræt.ə.dʒi

systematic strategy

Meaning
A methodical and organized plan or approach to achieve specific objectives.
Example
A systematic strategy was employed to achieve objectives.
C1 /skwɒt/

squat

Meaning
to crouch or sit with knees bent and body close to the ground
Example
He squatted down to tie his shoes.
C1 noun /ˈstæl.i.ən/

stallion

Meaning
An adult male horse that is not castrated, often used for breeding.
Example
The farm owns a powerful stallion for breeding purposes.
C1 verb /ˈɡloʊbəlaɪz/

globalize

Meaning
to make something worldwide in scope or application; to integrate into a global system
Example
Many companies globalize their operations to reach international markets.
C1 noun/verb mælˈfʌŋk.ʃən

malfunction

Meaning
A failure to function normally or satisfactorily; a defect or breakdown.
Example
The engine malfunctioned due to overheating.
C1 noun /ˈrɛ.trəʊ.fɪt.ɪŋ/

retrofitting

Meaning
The addition of new technology or features to older systems.
Example
The building underwent retrofitting to meet new safety standards.
C1 noun səˈsteɪnəbəl ænd kəˈlæbərətɪv əˈproʊtʃ

sustainable and collaborative approach

Meaning
A method of working together that can be maintained over time without depleting resources or causing harm.
Example
A sustainable and collaborative approach is crucial for solving environmental problems.
C1 adverb /ˈkrɒswaɪz/

Crosswise

Meaning
in the form of a cross; diagonally across
Example
Place the logs crosswise to build a stable fire.
C1 verb /skɪmp/

skimp

Meaning
to use less of something than is necessary in order to save money or effort
Example
Don’t skimp on quality when buying a new laptop.
C1 adjective /səbˈsɜːviənt/

subservient

Meaning
prepared to obey others unquestioningly; less important than something else
Example
She was too subservient to challenge his decision.
C1 noun /ˈtæpəstri/

tapestry

Meaning
A piece of thick textile fabric with pictures or designs woven into it, often hung on walls.
Example
The museum displayed an ancient tapestry from the 15th century.
C1 noun /ˈsɔːrsəri/

sorcery

Meaning
the use of magical powers, especially through spells and enchantments
Example
The villagers believed the illness was caused by sorcery.
C1 noun /ˈsɪtrɪk ˈæsɪd/

Citric Acid

Meaning
a natural acid found in citrus fruits, used as a food preservative and flavoring agent
Example
Add a pinch of citric acid to preserve the color of the fruit jam.
C1 adjective /ˈɡæst.li/

ghastly

Meaning
Causing great horror or fear; very unpleasant.
Example
The crime scene was a ghastly sight.
C1 adjective /məˈroʊs/

morose

Meaning
sullen, gloomy, or ill-tempered
Example
He became morose after losing his job.
C1 noun /ˈkaʊn.tə.nəns/

countenance

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

fidget

Meaning
to make small movements, especially because of nervousness or impatience
Example
The child began to fidget during the long lecture.
C1 noun /tækˈsɒnəmi/

taxonomy

Meaning
The science or practice of classifying things, especially organisms.
Example
Modern taxonomy helps scientists organize and study biodiversity.
C1 noun /ˌlɛ.seɪ ˈfɛər/

laissez-faire

Meaning
An economic policy where government does not intervene in business affairs.
Example
Laissez-faire policies encourage private enterprise.
C1 verb /ˈplʌm.ɪt/

plummet

Meaning
to fall straight down at high speed
Example
Stock prices plummeted after the sudden market crash.
C1 noun /pɜːrl drɒp/

Pearl drop

Meaning
a single pearl used as jewelry, often in earrings or pendants
Example
The elegant pearl drop earrings complemented her outfit perfectly.
C1 adjective /ˈtraɪflɪŋ/

Trifling

Meaning
of little importance; trivial; insignificant
Example
Don't worry about such trifling matters.