unspeakable
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C1 adjective /ʌnˈspiːkəbl/

unspeakable

Meaning
too bad or shocking to be expressed in words
Example
The survivors endured unspeakable horrors during the war.
C1 verb /ˈɛm.ə.neɪt/

emanate

Meaning
To come out or spread from a source.
Example
A sweet fragrance emanated from the garden.
C1 noun /ˈloʊ.kəst/

Locust

Meaning
a large insect that flies in groups and eats crops
Example
The locusts destroyed the entire wheat field.
C1 noun ˌsæn.ɪ.taɪˈzeɪ.ʃən

sanitization

Meaning
The process of cleaning and disinfecting to eliminate germs and bacteria.
Example
Regular sanitization keeps appliances germ-free.
C1 adjective /əˈdɒptɪv/

adoptive

Meaning
relating to the adoption of a child or the act of taking something as one’s own
Example
She grew up in a loving adoptive family.
C1 noun /əˈsɛnʃən/

ascension

Meaning
The act of rising or going up, often to an important position or a higher place.
Example
His rapid ascension in the company surprised everyone.
C1 adjective /rɪˈsɜːrdʒənt/

resurgent

Meaning
Becoming strong, active, or popular again.
Example
The resurgent economy gave hope to many businesses.
C1 verb /ˈmʌtər/

mutter

Meaning
to speak in a low or barely audible voice, often in dissatisfaction or irritation
Example
He muttered something under his breath as he walked away.
C1 noun /dɪsˈɪntrəst/

disinterest

Meaning
lack of interest or concern
Example
His disinterest in the project was obvious.
C1 noun /ˈɪnkwest/

inquest

Meaning
A legal or official inquiry, especially into the cause of a death.
Example
The inquest revealed the cause of the accident.
C1 adjective /ˌɪnkənˈkluːsɪv/

inconclusive

Meaning
Not leading to a definite result or decision.
Example
The investigation remained inconclusive due to a lack of evidence.
C1 noun /ˈsiːskeɪp/

seascape

Meaning
A view or painting of the sea.
Example
The artist painted a beautiful seascape at sunset.
C1 noun /ˈrɛzɪn/

resin

Meaning
a sticky organic substance, usually secreted by plants, often used in varnishes or plastics
Example
The craftsman used natural resin to make the sculpture shine.
C1 adjective /ɛsˈθɛtɪk/

esthetic

Meaning
Concerned with beauty or the appreciation of beauty.
Example
The building’s esthetic design attracted many visitors.
C1 noun /ˈkɒz.moʊs/

Cosmos

Meaning
a colorful annual flower with daisy-like blooms and feathery foliage
Example
The cosmos flowers swayed gently in the summer breeze across the meadow.
C1 noun /ˈwiː.vər bɜːd/

Weaver bird

Meaning
a small bird that builds elaborate woven nests from grass and twigs
Example
The weaver bird skillfully constructs its intricate nest.
C1 noun/verb /skɜːrdʒ/

scourge

Meaning
A source of great pain or punishment; to whip or inflict suffering on someone.
Example
Disease and poverty remain a scourge in many regions.
C1 noun /ˌʌnriˈælɪti/

unreality

Meaning
the state or quality of being unreal; lack of reality or truth
Example
The dreamlike setting gave the story a sense of unreality.
C1 adverb spɒnˈteɪnɪəsli

spontaneously

Meaning
In a spontaneous way; naturally and without planning or external cause.
Example
Children learn spontaneously through peer interactions.
C1 noun /jiːld ˌɒptɪmaɪˈzeɪʃən/

yield optimization

Meaning
The process of maximizing the productivity or efficiency of crop production through various agricultural techniques and practices.
Example
Yield optimization techniques can significantly improve crop production.
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 noun /kənˈtɛnʃən/

contention

Meaning
heated disagreement or argument; a point asserted in debate
Example
The main contention between the two parties was over tax reform.
C1 noun /ˌpɜːrsɪˈkjuːʃn/

persecution

Meaning
the act of treating someone cruelly or unfairly because of their religion, race, or beliefs
Example
The persecution of minorities has been condemned worldwide.
C1 adjective /ˈspel.baʊnd/

Spellbound

Meaning
completely fascinated and unable to move or think about anything else; enchanted
Example
The children sat spellbound as the magician performed his tricks.
C1 verb /ɪˈnɔːɡjʊreɪt/

inaugurate

Meaning
To formally begin or introduce something, especially with a ceremony.
Example
The mayor will inaugurate the new bridge tomorrow.
C1 adjective /miːk/

Meek

Meaning
gentle and submissive; humble; patient
Example
Despite his power, he remained meek and humble.
C1 verb /ˈfɛdərət/

federate

Meaning
to unite in a league or federation; to form an alliance
Example
Several states federated to create a stronger union.
C1 noun /məˈmɛn.toʊ/

memento

Meaning
An object kept as a reminder of a person, place, or event.
Example
She kept the ticket as a memento of their first concert together.
C1 noun /beɪn/

bane

Meaning
A cause of great distress, harm, or annoyance.
Example
Traffic jams are the bane of city life.
C1 noun /mɔːs/

Moss

Meaning
a small flowerless plant that grows in clumps in moist places
Example
Green moss covered the old stone wall.
C1 noun /ˈkwɪk.sænd/

Quick-sand

Meaning
loose wet sand that yields easily to pressure and sucks in anything on its surface
Example
The explorer got trapped in quicksand while crossing the desert.
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 noun /ænˈtɪθəsɪs/

antithesis

Meaning
A person, thing, or idea that is the direct opposite of another; a rhetorical device contrasting opposing ideas in parallel structure.
Example
Love is the antithesis of hate.
C1 noun /ˈkæn.ɪ.bəl/

Cannibal

Meaning
a person who eats the flesh of other human beings
Example
The explorer's journal described rumors of cannibals living on the remote island.
C1 noun rɪˌdʒɛnəˈreɪʃən

regeneration

Meaning
Renewal, growth and development of cells, tissues or energy
Example
Proper rest allows muscle regeneration after exercise.
C1 noun /kæsˈkeɪd/

Cascade

Meaning
a waterfall; a succession of stages or operations
Example
The mountain cascade created a beautiful natural swimming pool below.
C1 verb /ˈskwɒndər/

squander

Meaning
to waste money, time, or opportunities in a careless way
Example
He squandered his inheritance on gambling.
C1 verb ˌsɝː.kəmˈvent

circumvent

Meaning
To cleverly avoid or find a way around obstacles or rules.
Example
He tried to circumvent the security system.
C1 adjective /ˈheɪ.zi/

Hazy

Meaning
covered with haze; unclear or vague; lacking clarity
Example
The mountain tops were hazy in the morning mist.
C1 noun /ˈpoʊdiətrɪst/

podiatrist

Meaning
a doctor specializing in foot care
Example
I have an appointment with the podiatrist for my ankle pain.
C1 noun /ˈpæd.ək/

paddock

Meaning
a small enclosed field where horses or other animals are kept
Example
The horses were grazing in the paddock.
C1 verb /ˈstaɪmi/

stymie

Meaning
to prevent or hinder the progress of something
Example
The new regulations could stymie small businesses.
C1 verb /ɪnˈtʃænt/

enchant

Meaning
to delight or charm greatly; to cast a spell over
Example
The storyteller enchanted the children with his tales.
C1 verb /ʌnˈrævəl/

unravel

Meaning
To undo twisted or knitted threads; to solve or explain something complicated.
Example
The detective worked hard to unravel the mystery.
C1 adjective /ˈrʌɡ.ɪd/

Rugged

Meaning
rough and uneven; having a rough irregular surface; tough and strong
Example
The hikers crossed the rugged mountain terrain.
C1 adjective /ˈbaʊn.tɪ.fəl/

bountiful

Meaning
Large in quantity; abundant; generous in giving.
Example
The farmer was grateful for the bountiful harvest.
C1 verb /ˈbæbəl/

babble

Meaning
to talk rapidly and continuously in a foolish way
Example
The baby babbles all day long.
C1 verb /ˈheɪsən/

hasten

Meaning
To move or act quickly; to cause something to happen sooner.
Example
He hastened to finish his work before the deadline.
C1 adjective /hɪpˈnɒtɪk/

hypnotic

Meaning
Producing sleep or a trance-like state; mesmerizing.
Example
The music had a hypnotic effect on the audience.
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 noun /ˈfɔːrwɜːrd/

foreword

Meaning
a short introduction at the beginning of a book, typically written by someone other than the author
Example
The foreword of the book was written by a famous historian.
C1 noun /fɔːrˈkloʊʒər/

foreclosure

Meaning
The legal process by which a lender takes control of a property from a borrower who has failed to make payments.
Example
The family lost their home due to foreclosure after missing several mortgage payments.
C1 noun /ˈɒn.slɔːt/

onslaught

Meaning
A fierce or destructive attack.
Example
The village faced an onslaught of enemy forces.
C1 adjective /ˌhɑːrdˈhɑːrtɪd/

hard-hearted

Meaning
showing no kindness or sympathy; cruel
Example
The landlord was hard-hearted and refused to help the poor family.
C1 adjective /dɪˈsɪd.ju.əs/

deciduous

Meaning
Referring to trees that shed their leaves seasonally, typically in autumn.
Example
Oak and maple trees are deciduous, shedding leaves in autumn.
C1 noun /bəˈnɛv.ə.ləns/

benevolence

Meaning
The quality of being well meaning and kindly; the disposition to do good.
Example
His benevolence towards the poor earned him respect.
C1 verb /ˌdɪsəˈsɛmbəl/

disassemble

Meaning
To take apart something into its separate pieces.
Example
He had to disassemble the computer to repair it.
C1 adjective /ɪˈneɪn/

inane

Meaning
lacking sense, meaning, or significance; silly or pointless
Example
The movie was criticized for its inane dialogue.
C1 adjective ˌæd.vɚˈser.i.əl

adversarial

Meaning
Involving or characterized by conflict or opposition.
Example
The two companies have an adversarial relationship in the market.
C1 noun ˌkæl.ɪˈbreɪ.ʃən

calibration

Meaning
The action or process of adjusting or determining the accuracy of measuring instruments.
Example
The accuracy of a scale depends on regular calibration.
C1 verb /dɪˈfɔːrm/

deform

Meaning
to change the shape or form of something, especially in a way that makes it ugly or damaged; to distort
Example
The intense heat began to deform the plastic container.
C1 adjective /ˈkɒn.keɪv/

concave

Meaning
curved inward like the inside of a bowl
Example
The mirror had a concave surface that magnified her reflection.
C1 verb /ˈhaɪbərˌneɪt/

hibernate

Meaning
To spend the winter in a dormant state, as some animals do.
Example
Bears hibernate in caves during the winter.
C1 verb /əˈbeɪt/

abate

Meaning
to become less intense or widespread
Example
The storm began to abate after midnight.
C1 noun /ˌdiː.viˈeɪ.ʃən/

Deviation

Meaning
the action of departing from an established course; a departure from usual standards
Example
Any deviation from the established procedure must be reported immediately.
C1 noun /ˌkɒnfləˈɡreɪʃən/

conflagration

Meaning
A large, destructive fire that destroys a great deal of land or property.
Example
The forest was devastated by a massive conflagration that lasted for days.
C1 verb /ɪˈroʊd/

erode

Meaning
to gradually wear away or destroy by natural forces such as water, wind, or chemical action
Example
The coastline has begun to erode due to constant waves.
C1 verb /ˈstæmər/

stammer

Meaning
To speak with sudden involuntary pauses and a tendency to repeat the initial letters of words.
Example
The nervous student began to stammer during his speech.
C1 noun ˌnɒn.kəʊˌɒp.ərˈeɪ.ʃən

non-cooperation

Meaning
The practice of refusing to cooperate, especially as a form of protest.
Example
The non-cooperation movement gained momentum.
C1 adjective /tɛk ˈdrɪv.ən/

tech-driven

Meaning
Powered or guided by technology; dependent on technological advancement for operation.
Example
The agricultural sector is becoming more tech-driven for higher efficiency.
C1 noun kəˈrəʊ.ʒən

corrosion

Meaning
The gradual destruction of materials by chemical or electrochemical reaction, especially of metals by oxidation.
Example
Corrosion in pipes leads to leakage.
C1 noun ˌdjʊə.rəˈbɪl.ə.ti

durability

Meaning
The ability to withstand wear, pressure, or damage; hard-wearing.
Example
The durability of materials affects performance.
C1 adjective /fəˈnɛtɪk/

phonetic

Meaning
relating to the sounds of speech or pronunciation
Example
The teacher taught the students the phonetic spelling of difficult words.
C1 noun /ˈkɒb.lər/

Cobbler

Meaning
a person who repairs shoes and other leather goods
Example
The cobbler fixed my broken shoes perfectly.
C1 adjective /ɪnˈvɑːlənˌtɛri/

involuntary

Meaning
done without will or conscious control
Example
He gave an involuntary shiver when he heard the loud noise.
C1 noun /ˈɔr.ə.kəl/

Oracle

Meaning
a person regarded as a source of wise counsel; in ancient times, a priest or priestess acting as a medium
Example
The ancient Greeks consulted the oracle at Delphi.
C1 noun /vəˈnɪər/

veneer

Meaning
A thin decorative covering of fine wood applied to a coarser wood or other material; a superficially attractive appearance.
Example
The table was covered with a thin veneer of mahogany.
C1 noun ˈmɑːrdʒɪnəlaɪzd ˌɪndɪˈvɪdʒuəlz

marginalized individuals

Meaning
People who are treated as insignificant or peripheral to society, often excluded from mainstream social, economic, or political activities.
Example
Marginalized individuals often face severe challenges.
C1 adjective /ˌɪndɪˈstrʌktəbl/

indestructible

Meaning
Impossible to destroy or break.
Example
The superhero's shield was said to be indestructible.
C1 adverb /ˈmɪdweɪ/

Midway

Meaning
halfway; at or to the middle point
Example
The project is midway through completion.
C1 adjective ˌsɪn.əˈdʒɪs.tɪk

synergistic

Meaning
Relating to the interaction of elements that when combined produce a greater effect than the sum of their individual effects.
Example
A synergistic effect occurs when nutrients work together.
C1 noun, verb /raʊt/

rout

Meaning
A decisive defeat; to defeat completely.
Example
The army routed the enemy forces in the battle.
C1 noun /ɪnˈsæn.ə.ti/

Insanity

Meaning
the state of being seriously mentally ill; extreme foolishness or irrationality
Example
The defense lawyer argued that his client was not guilty by reason of insanity.
C1 adjective /ˈɪnfəməs/

infamous

Meaning
well known for some bad quality or deed
Example
The dictator was infamous for his cruelty.
C1 verb /pərˈplɛks/

perplex

Meaning
To confuse or puzzle someone.
Example
The complex instructions perplexed the students.
C1 adjective /nəʊˈmæd.ɪk/

nomadic

Meaning
Living the life of a nomad; wandering from place to place without a fixed home.
Example
The tribe led a nomadic lifestyle.
C1 noun /ræˈpɔːr/

rapport

Meaning
A close and harmonious relationship in which the people or groups concerned understand each other's feelings or ideas.
Example
The teacher built a strong rapport with her students.
C1 adjective /ɪˈmɜːrdʒənt/

emergent

Meaning
just coming into existence or becoming prominent
Example
The emergent startup quickly attracted investors.
C1 adjective /ˈtɛsti/

testy

Meaning
Easily irritated or annoyed.
Example
He became testy when asked the same question repeatedly.
C1 adjective /ˌɪntərˈtʃeɪndʒəbl/

interchangeable

Meaning
able to be exchanged with each other without difference or loss of function
Example
These machine parts are interchangeable, so they can be replaced easily.
C1 noun /ˌpriːməˈnɪʃən/ or /ˌprɛm-/

premonition

Meaning
a strong feeling that something is about to happen, often something negative
Example
She had a premonition of danger before the trip.
C1 adjective /ˈwɪlfəl/

willful

Meaning
Deliberate, intentional, or stubbornly determined to do as one wants.
Example
Her willful disregard for the rules got her into trouble.
C1 noun /ˈlɪŋɡwɪst/

linguist

Meaning
A person skilled in foreign languages or in the scientific study of language.
Example
She is a linguist who speaks six languages fluently.
C1 noun /ˈmæntl̩/

mantle

Meaning
A cloak or covering; also the layer of the earth between the crust and the core.
Example
The leader assumed the mantle of responsibility.
C1 verb /ˌkɒm.pɑːtˈmen.təl.aɪz/

compartmentalize

Meaning
To divide into sections or categories; to separate things into compartments.
Example
To increase efficiency, he compartmentalized his work tasks.
C1 noun /ˈmɔː.tər ænd ˈpes.əl/

Mortar and Pestle

Meaning
a bowl and grinding tool used to crush and grind spices, herbs, and other substances
Example
She ground the spices using a mortar and pestle.
C1 noun /ɪmˈbɑː.ɡoʊ/

embargo

Meaning
A trade ban, restriction, or prohibition imposed by a government or international organization on a country.
Example
The UN imposed an embargo on arms exports.
C1 adjective /ˌʌnˈpɑr.də.nə.bəl/

Unpardonable

Meaning
too bad to be forgiven; inexcusable
Example
His betrayal of trust was an unpardonable offense.
C1 noun /ˈdɪsɪdənt/

dissident

Meaning
A person who opposes official policy, especially that of an authoritarian state.
Example
The dissident was arrested for speaking against the government.
C1 adverb /əˈlɒft/

aloft

Meaning
Up in or into the air; overhead.
Example
The kite was flying aloft in the clear sky.
C1 noun /ˈsɪləbəl/

syllable

Meaning
A unit of pronunciation having one vowel sound, with or without surrounding consonants, forming the whole or part of a word.
Example
The word 'computer' has three syllables.
C1 noun /moʊl/

Mole

Meaning
a small burrowing mammal with tiny eyes and soft fur
Example
The mole dug tunnels under the garden.
C1 verb /rɪˈkuːpəreɪt/

recuperate

Meaning
to recover from illness or regain strength
Example
She went to the countryside to recuperate after surgery.
C1 adjective /ɪnˈdetɪd/

Indebted

Meaning
owing money or gratitude to someone; obligated; grateful
Example
I am deeply indebted to my teacher for all her guidance.
C1 noun /ˈpɑːrlər/

parlor

Meaning
A sitting room in a private house, or a shop providing specified services.
Example
They welcomed the guests into the front parlor.
C1 adjective /ˈpoʊləraɪzd/

polarized

Meaning
divided into two sharply contrasting groups or opinions
Example
The debate polarized the community on the issue of climate change.
C1 verb /dɪsˈmæntəl/

dismantle

Meaning
to take apart; to remove or destroy the parts of
Example
Workers will dismantle the old bridge next month.
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 noun /prəˈpraɪəti/

propriety

Meaning
Conformity to accepted standards of behavior or morality.
Example
He always behaved with the utmost propriety in public.
C1 verb /uːz/

ooze

Meaning
to slowly flow or leak out through small openings or pores
Example
Blood began to ooze from the small cut.
C1 noun ˈsɒv.rɪn.ti

sovereignty

Meaning
The authority of a state to govern itself or another state; supreme power or authority.
Example
Sovereignty is essential for a nation's identity.
C1 adjective /ˈlʌʃəs/

luscious

Meaning
deliciously sweet or rich; highly appealing to the senses
Example
She served a luscious chocolate cake.
C1 noun /ˈpraɪməsi/

primacy

Meaning
the state of being first in importance or authority
Example
The primacy of education cannot be denied.
C1 verb /ˈswɪndl/

swindle

Meaning
to cheat someone out of money or possessions by deceit
Example
The con artist tried to swindle the old man out of his savings.
C1 verb /ˈwɪtl/

whittle

Meaning
to carve or shape something by cutting off small pieces; to gradually reduce
Example
He spent the afternoon whittling a piece of wood into a toy.
C1 adjective /ˌdɪktəˈtɔːriəl/

dictatorial

Meaning
Having or showing a tendency to tell people what to do in an autocratic way.
Example
His dictatorial style made him unpopular among colleagues.
C1 adjective /ˈfɜːrtɪv/

furtive

Meaning
Attempting to avoid notice or attention, typically because of guilt or a belief that discovery would lead to trouble.
Example
He cast a furtive glance at the door before leaving.
C1 adjective /ˈlɛdʒəbl/

legible

Meaning
clear enough to read
Example
Her handwriting was barely legible.
C1 verb /ˈdrɪbəl/

dribble

Meaning
to let liquid flow slowly in drops or to move a ball skillfully with repeated small kicks or bounces
Example
The baby dribbled milk on his shirt.
C1 noun /ˌdʒerənˈtɑːlədʒi/

gerontology

Meaning
The scientific study of old age and the process of aging.
Example
She chose to specialize in gerontology after completing medical school.
C1 noun /ˌdɪsəˈluːʃən/

dissolution

Meaning
the act of formally ending or breaking apart something, such as an organization or marriage
Example
The dissolution of the company was announced yesterday.