slumber
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C1 noun/verb /ˈslʌmbər/

slumber

Meaning
A state of sleep; to sleep lightly or rest.
Example
The child slumbered peacefully through the night.
C1 noun /səˈlɛmnɪti/

solemnity

Meaning
the state or quality of being serious and dignified
Example
The ceremony was conducted with great solemnity.
C1 adjective /spəˈrædɪk/

sporadic

Meaning
Occurring irregularly or in scattered instances rather than continuously.
Example
The region experienced sporadic rain showers throughout the week.
C1 adjective ˈsɪŋ.krə.nəs

synchronous

Meaning
Existing or occurring at the same time.
Example
Synchronous learning involves live online classes.
C1 adjective ˌsəʊsɪəʊpəˈlɪtɪkəl

sociopolitical

Meaning
Combining social and political factors.
Example
Sociopolitical factors often influence public policy decisions.
C1 noun /səˈprɛʃən/

suppression

Meaning
the act of forcibly stopping something or holding back feelings or actions
Example
The suppression of free speech led to protests.
C1 noun /swiːt.laɪm/

Sweetlime

Meaning
a citrus fruit that is sweeter and less acidic than regular lime
Example
The sweetlime juice was refreshing on a hot day.
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 /ˈspiːʃiː/

specie

Meaning
money in the form of coins rather than notes or credit
Example
The transaction was made in specie.
C1 noun /saɪð/

scythe

Meaning
A tool with a long curved blade used for cutting grass or grain.
Example
The farmer sharpened his scythe before harvesting the wheat.
C1 noun /ʃeɪl/

shale

Meaning
a fine-grained sedimentary rock that can be split into thin layers
Example
The region is rich in shale and natural gas deposits.
C1 noun /ˌsɛlfsəˈfɪʃənsi/

Self-sufficiency

Meaning
the ability to supply one's own needs without external assistance; independence
Example
The farm achieved complete self-sufficiency in food production.
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 /ˈsed.ɪ.mənt/

Sediment

Meaning
matter that settles to the bottom of a liquid; particles deposited by water or wind
Example
The river carried sediment downstream during the flood.
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 adjective /səbˈsɪd.i.ər.i/

Subsidiary

Meaning
less important than the main thing; secondary; of or relating to a subsidiary company
Example
The subsidiary company handles all overseas operations.
C1 noun ˈsɪmbəlɪzəm

symbolism

Meaning
The use of symbols to represent ideas or qualities.
Example
The use of symbolism in the novel is masterful.
C1 adjective /ˈsɪn.tɪ.leɪ.tɪŋ/

scintillating

Meaning
brilliantly clever, exciting, or sparkling
Example
Her scintillating conversation kept everyone entertained.
C1 adjective /sɔɪld/

soiled

Meaning
dirty or stained; not clean
Example
His clothes were soiled after playing in the mud.
C1 adjective /ˌsɛrənˈdɪpɪtəs/

serendipitous

Meaning
Occurring or discovered by chance in a happy or beneficial way.
Example
Their meeting at the café was purely serendipitous.
C1 noun /ˌsəʊ.ʃi.əʊˈek.ə.nɒm.ɪk ˈprɒɡ.res/

socioeconomic progress

Meaning
Advancement in both social and economic conditions of a society or community.
Example
Socioeconomic progress uplifts marginalized communities.
C1 noun /ˌsɪmbɪˈəʊsɪs/

symbiosis

Meaning
A mutually beneficial relationship between different people or groups.
Example
The symbiosis between the two companies led to mutual growth.
C1 verb /səbˈsɪst/

subsist

Meaning
To maintain or support oneself, especially at a minimal level.
Example
Many villagers still subsist on fishing and farming.
C1 adjective /ˈsaʊnd.pruːf/

Sound-proof

Meaning
impervious to sound; preventing sound from entering or leaving
Example
The recording studio has sound-proof walls.
C1 noun /ˈstɪɡmə/

stigma

Meaning
a mark of shame or disgrace associated with a particular circumstance or quality
Example
There is still a stigma around mental health issues in many societies.
C1 verb /ˈʃʌdər/

shudder

Meaning
to tremble or shake suddenly, often due to fear, cold, or strong emotion
Example
She shuddered at the thought of walking alone in the dark forest.
C1 adjective /ˈskrʌfi/

Scruffy

Meaning
untidy or unkempt in appearance; shabby and worn
Example
The scruffy old dog wandered through the streets looking for food.
C1 verb /skʌlpt/

sculpt

Meaning
to create or shape something by carving or molding
Example
The artist sculpted a beautiful statue from marble.
C1 noun /ˈsæf.aɪər/

Saphire

Meaning
a precious stone that is typically blue in color
Example
The royal crown was adorned with a large sapphire.
C1 noun /ˈsteɪl.meɪt/

stalemate

Meaning
A situation in which no progress can be made or no party can win.
Example
Negotiations ended in a stalemate.
C1 adjective /sliːk/

sleek

Meaning
smooth, shiny, and stylish
Example
She drove a sleek black sports car.
C1 noun /ˈsteɪtəs kwoʊ/

status quo

Meaning
The existing state of affairs, especially regarding social or political issues.
Example
The government decided to maintain the status quo until further review.
C1 noun /ˈstaɪpend/

Stipend

Meaning
a fixed regular sum paid as a salary or allowance
Example
The research student receives a monthly stipend for living expenses.
C1 noun /streɪt/

strait

Meaning
A narrow passage of water connecting two seas or two large areas of water.
Example
The Strait of Gibraltar connects the Atlantic Ocean and the Mediterranean Sea.
C1 /splɪnt/

splint

Meaning
A rigid device used to support and immobilize a broken or injured body part.
Example
The doctor applied a splint to stabilize the patient's broken arm.
C1 adjective /suːˈpɜːrlətɪv/

superlative

Meaning
Of the highest quality or degree; expressing the extreme form of an adjective or adverb.
Example
Her performance was superlative, earning her a standing ovation.
C1 adjective /ˈspjʊəriəs/

spurious

Meaning
Not genuine, authentic, or true; false or fake.
Example
The report was based on spurious claims.
C1 adjective /ˈstɔːlwərt/

stalwart

Meaning
Loyal, reliable, and hardworking; strongly built or sturdy.
Example
She has always been a stalwart supporter of the community.
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 adjective /səbˈvɜːrsɪv/

subversive

Meaning
seeking or intended to undermine or overthrow an established system or authority
Example
The group was banned for its subversive activities.
C1 noun /ˈsiːskeɪp/

seascape

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

sisterhood

Meaning
The relationship between sisters, or a community of women united by shared experiences or goals.
Example
The feminist movement created a strong sense of sisterhood among women.
C1 verb /smɜrk/

smirk

Meaning
to smile in a self-satisfied, smug, or silly way
Example
He smirked when he won the argument.
C1 noun /ˌsɛnsɪtaɪˈzeɪʃən/

sensitization

Meaning
The process of becoming sensitive to a substance, situation, or influence.
Example
The doctor warned about the sensitization caused by repeated exposure to chemicals.
C1 noun /stents/

stents

Meaning
Small mesh tubes used to treat narrow or blocked arteries.
Example
Stents were successfully placed using robotic techniques.
C1 noun /ˌsæl.jʊˈteɪ.ʃən/

Salutation

Meaning
a greeting; an expression of goodwill
Example
The letter began with a formal salutation.
C1 noun /ʃoʊl/

shoal

Meaning
a large group of fish swimming together; a shallow place in water
Example
We saw a shoal of fish near the coast.
C1 adjective /stiːpt/

steeped

Meaning
Completely surrounded by or filled with a particular quality, influence, or experience.
Example
The town is steeped in history and tradition.
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 adjective /ˌsæŋktɪˈmoʊniəs/

sanctimonious

Meaning
Making a show of being morally superior to others; hypocritically pious.
Example
He gave a sanctimonious speech about honesty while he himself was corrupt.
C1 noun sælˈveɪʃən

salvation

Meaning
Deliverance from sin and its consequences, believed by Christians to be brought about by faith in Christ.
Example
The story revolves around the theme of salvation.
C1 adjective /səˈsɛp.tə.bəl/

susceptible

Meaning
Likely or liable to be influenced or harmed by a particular thing.
Example
Children are more susceptible to infections.
C1 adjective /ˌsɛlf ɪˈfeɪsɪŋ/

self-effacing

Meaning
not drawing attention to oneself; modest
Example
Despite his success, he remained self-effacing and humble.
C1 verb /səbˈmɜːrdʒ/

submerge

Meaning
to put under water or cover with liquid
Example
The floodwaters threatened to submerge the village.
C1 verb /ˈstɪɡmətaɪz/

stigmatize

Meaning
to describe or regard someone as worthy of disgrace or disapproval
Example
People with certain illnesses are often unfairly stigmatized.
C1 noun ˌskeɪ.ləˈbɪl.ə.ti

scalability

Meaning
The capacity to be changed in size or scale; the ability of a system to handle a growing amount of work.
Example
The new software offers high scalability for large enterprises.
C1 adjective /ˈsaɪt.ləs/

Sightless

Meaning
unable to see; blind; lacking vision
Example
The sightless man navigated the street with his guide dog.
C1 noun, verb /strænd/

strand

Meaning
Noun: A single thin length of thread, wire, or similar. Verb: To leave someone or something without a way of moving or leaving.
Example
The storm stranded many tourists on the island.
C1 verb /sʌlk/

sulk

Meaning
to be silent and bad-tempered because you are angry or disappointed
Example
She sulked in her room after the argument.
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 /ˈspɛktrəl/

spectral

Meaning
Relating to a ghost or specter; ghostly. Also relating to a spectrum.
Example
The old mansion had a spectral atmosphere at night.
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 /ˈspɪnstər/

spinster

Meaning
An unmarried woman, often one who is older and considered unlikely to marry
Example
The novel featured a kind-hearted spinster who cared for the village children.
C1 adjective /ˈstoʊɪk/

stoic

Meaning
Showing little or no emotion, even in difficult situations.
Example
She remained stoic during the crisis, never showing fear or panic.
C1 noun ˌsteɪbəlaɪˈzeɪʃən

stabilization

Meaning
The process of making or becoming stable.
Example
The stabilization of the structure was essential after the earthquake.
C1 noun /səˈlɪləkwi/

soliloquy

Meaning
a speech in which a character talks to themselves, often used in drama to reveal inner thoughts
Example
Hamlet's soliloquy is one of the most famous passages in Shakespearean drama.
C1 verb /səbˈvɜːrt/

subvert

Meaning
to undermine or overthrow an established system, authority, or institution
Example
The rebels tried to subvert the government.
C1 noun /ˈsæl.mən fɪʃ / ˈroʊ.huː/

Salmon fish / Rohu

Meaning
a freshwater fish popular in South Asian cuisine; also refers to salmon which is a different species
Example
Rohu fish is commonly prepared with spices in Bengali households.
C1 verb /ˈsaɪdˌtræk/

sidetrack

Meaning
To distract from the main subject or activity.
Example
She was sidetracked by an unexpected phone call.
C1 noun /sleɪ/

sleigh

Meaning
A vehicle pulled by horses or reindeer over snow or ice.
Example
Children were excited to ride in the sleigh through the snowy village.
C1 verb /səbˈdjuː/

subdue

Meaning
To bring under control, especially by force; to overcome or quiet.
Example
The army was able to subdue the rebellion quickly.
C1 adjective /ˌsækrɪˈfɪʃəl/

sacrificial

Meaning
Relating to or involving sacrifice.
Example
The lamb was used as a sacrificial offering in the ritual.
C1 verb /sərˈmaɪz/

surmise

Meaning
to suppose something is true without having evidence
Example
She surmised that he was not coming to the meeting.
C1 noun/verb /smʌdʒ/

smudge

Meaning
a dirty mark or smear; to make something dirty or unclear by rubbing or touching
Example
She accidentally smudged her lipstick on the napkin.
C1 noun ˈsʌs.tɪ.nəns

Sustenance

Meaning
Food or support necessary for sustaining life
Example
Water is essential for human sustenance.
C1 adjective /ˌsækrəˈlɪdʒəs/

sacrilegious

Meaning
Showing disrespect or irreverence toward something sacred.
Example
The painting was criticized as being sacrilegious.
C1 verb /ˈsɪn.θə.saɪz/

synthesize

Meaning
To combine a number of things into a coherent whole.
Example
Scientists synthesize new compounds for medical research.
C1 noun /ˈseɪɑːns/

seance

Meaning
A meeting where people attempt to communicate with the spirits of the dead.
Example
They held a seance to contact their late grandmother.
C1 adjective /ˈsɪm.jʊ.leɪ.tɪd/

simulated

Meaning
Artificially created to look real but not actually real.
Example
The pilot trained in a simulated flight environment.
C1 verb /strʌt/

strut

Meaning
to walk with a stiff, proud, and confident gait, often to show off
Example
He strutted across the stage after winning the award.
C1 verb /swɜːrv/

swerve

Meaning
to change direction suddenly, especially to avoid hitting something
Example
The car swerved to avoid the dog.
C1 adjective /ˈsnɒbɪʃ/

snobbish

Meaning
having or showing the attitude of people who think they are better than others
Example
She seemed snobbish because she avoided talking to the waiters.
C1 noun /sɪˈnɒpsɪs/

synopsis

Meaning
a brief summary of the main points of a text, film, or research
Example
The publisher asked the author to submit a one-page synopsis of the novel.
C1 noun stɔːrm ɪnˌtensɪfɪˈkeɪʃən

storm intensification

Meaning
The process by which storms become stronger and more severe in intensity.
Example
Storm intensification is linked to climate change.
C1 noun /stɛlθ/

stealth

Meaning
The act of moving, doing, or achieving something quietly and secretly.
Example
The cat moved with stealth towards its prey.
C1 noun /ˈstɪm.jʊ.laɪ/

stimuli

Meaning
Things that create reactions or provide motivation.
Example
Bright light and loud sounds are common stimuli for alertness.
C1 noun /ˈstætʃər/

stature

Meaning
A person's natural height or their reputation and importance.
Example
Her intellectual stature made her a respected figure in academia.
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 ˈsɒl.vən.si

solvency

Meaning
The possession of assets in excess of liabilities; ability to pay debts.
Example
The company's solvency improved after restructuring.
C1 noun səˈlɪnɪti ɪnˈtruːʒən

salinity intrusion

Meaning
The movement of salt water into freshwater areas, typically affecting coastal regions.
Example
Salinity intrusion affects coastal regions.
C1 adjective /ˈstɪndʒi/

stingy

Meaning
unwilling to spend or give; miserly
Example
He is too stingy to buy a gift for his friend.
C1 adjective /seɪdʒ/

Sage

Meaning
wise; showing wisdom from experience; prudent; having good judgment
Example
The sage advice from the elder helped solve the problem.
C1 noun /ˈsæŋk.ʃən/

Sanction

Meaning
official permission or approval; a penalty for disobeying a rule
Example
The government imposed economic sanctions on the country.
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 ˈsɛlf pəˈzɪʃən

self-possession

Meaning
The quality of being calm and confident and in control of one's emotions; composure.
Example
His self-possession during the crisis was remarkable.
C1 verb /ˈskaʊər/

scour

Meaning
to clean or brighten the surface of something by scrubbing; to search thoroughly
Example
She scoured the kitchen until it shone.
C1 adjective /skəˈlæstɪk/

scholastic

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

statistician

Meaning
A person who specializes in collecting, analyzing, and interpreting numerical data.
Example
The statistician presented the survey results with great clarity.
C1 adjective /ˈsɛptɪk/

septic

Meaning
Infected with harmful bacteria; relating to or causing infection.
Example
The doctor treated the patient's septic wound immediately.
C1 noun /sərˈveɪər/

surveyor

Meaning
A person who measures and maps land, buildings, or other features.
Example
The surveyor measured the land for construction.
C1 adjective /ˌsuː.pəˈsɒn.ɪk/

Supersonic

Meaning
faster than the speed of sound; relating to speeds greater than the speed of sound
Example
The supersonic jet broke the sound barrier.
C1 verb /səˈplænt/

supplant

Meaning
To take the place of something or someone, often by force or strategy.
Example
Digital platforms have supplanted traditional newspapers.
C1 noun /ˈsɑːri/

Saree

Meaning
a garment consisting of a length of cotton or silk elaborately draped around the body, traditionally worn by women from South Asia
Example
She looked elegant in her red silk saree at the festival.
C1 adjective /ˈsæk.rəˌsæŋkt/

sacrosanct

Meaning
Regarded as too important or valuable to be interfered with; sacred.
Example
Freedom of speech is considered sacrosanct in democratic societies.
C1 noun/verb /ˈskɜːrmɪʃ/

skirmish

Meaning
a small or brief fight between groups of soldiers; to engage in such a fight
Example
The soldiers got into a skirmish near the border.
C1 noun /stæɡˈneɪ.ʃən/

stagnation

Meaning
A state of inactivity or lack of growth, especially in an economy.
Example
High unemployment led to economic stagnation.
C1 noun /sɪˈnɪləti/

senility

Meaning
The state of being old and showing the weaknesses of age, especially mental decline.
Example
His forgetfulness was attributed to senility.
C1 noun /ˈsɪndɪkət/

syndicate

Meaning
A group of individuals or organizations combined to promote a common interest or carry out a business venture.
Example
A syndicate of investors bought the struggling company.
C1 verb /sɪft/

sift

Meaning
to separate or sort through carefully, often using a sieve or by examining closely
Example
She sifted the flour before adding it to the cake mixture.
C1 verb /ˈsnɪkər/

snicker

Meaning
to laugh quietly in a disrespectful or mocking way
Example
The students snickered when the teacher made a mistake.
C1 verb /spɜːr/

spur

Meaning
To encourage or motivate someone to take action.
Example
The teacher's praise spurred him to study harder.
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 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 noun, adjective /ˈsɒlvənt/

solvent

Meaning
a liquid that dissolves other substances; also means able to pay debts
Example
Acetone is a common solvent used in laboratories.
C1 adjective /sɪˈkluːdɪd/

secluded

Meaning
Placed apart from other people or things; private and quiet.
Example
They spent their vacation in a secluded beach house.
C1 noun /stɛntʃ/

stench

Meaning
A very strong and unpleasant smell.
Example
The stench of garbage filled the alley.
C1 verb/noun /stuːp/

stoop

Meaning
To bend one's body forward and downward; also a small porch or staircase at the entrance of a house
Example
He had to stoop to pick up the coin.
C1 verb /splaɪs/

splice

Meaning
to join two pieces of rope, film, or other material by weaving or attaching them together
Example
The technician spliced the two wires to restore the connection.
C1 verb /snɪər/

sneer

Meaning
to smile or speak in a mocking or contemptuous way
Example
She sneered at his attempt to sing.
C1 verb /siːp/

seep

Meaning
to flow or leak slowly through small openings or pores
Example
Water began to seep through the cracks in the wall.
C1 verb /slɪŋ/

sling

Meaning
to throw or hang something roughly or carelessly
Example
He slung his bag over his shoulder before leaving.