sinuous
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C1 adjective /ˈsɪnjuəs/

sinuous

Meaning
Having many curves, bends, or turns; winding.
Example
The hikers followed a sinuous path through the forest.
A2 noun /stoʊn/

stone

Meaning
a hard, naturally occurring mineral material found in the earth
Example
He threw a stone into the lake.
B2 adjective /ˈsoʊloʊ/

solo

Meaning
performed by one person alone; a single performance
Example
She decided to perform a solo dance at the talent show.
C2 noun/verb /sluːs/

sluice

Meaning
A sliding gate for controlling the flow of water; to wash or rinse with water in large quantities.
Example
The workers sluiced the mud off the street after the heavy rain.
C2 verb /sweɪð/

swathe

Meaning
To wrap or cover closely or completely.
Example
She swathed the baby in a soft blanket.
C1 noun /ˌsæl.jʊˈteɪ.ʃən/

Salutation

Meaning
a greeting; an expression of goodwill
Example
The letter began with a formal salutation.
C2 noun /ˈsaɪz.mə.ɡræf/

seismograph

Meaning
An instrument that measures and records details of earthquakes, such as force and duration.
Example
The seismograph detected a strong tremor in the area.
C2 noun /ˈsɪnjuː/

sinew

Meaning
A tendon; figuratively, the source of strength, power, or resilience.
Example
The sinews in his arms stood out as he lifted the heavy box.
C2 adjective /ˈsʌpliənt/

suppliant

Meaning
Humbly or earnestly asking for something, especially from a person in authority.
Example
The suppliant man begged for mercy at the king's feet.
B1 adverb /ˈʃɔːt.li/

Shortly

Meaning
soon; in a short time; briefly
Example
The meeting will begin shortly.
B2 adjective /stiːp/

steep

Meaning
Having a sharp inclination or high slope; also can mean excessive (as in price).
Example
The hikers climbed a steep mountain trail.
C1 noun /ˈsɪlk.wɜːrm/

Silk-worm

Meaning
the caterpillar of a moth that produces silk fibers used to make silk fabric
Example
Silkworms feed on mulberry leaves to produce silk.
C1 adjective /ˈsiː.naɪl/

senile

Meaning
Showing the weaknesses of old age, especially mental decline.
Example
The old man became senile and forgot familiar faces.
C1 noun /sɪˈsɛʃən/

secession

Meaning
The action of formally withdrawing from membership of a federation or body.
Example
The secession of the southern states led to the Civil War.
B1 noun /ˈsteɪtəs/

status

Meaning
the social or professional position or condition of someone or something
Example
His social status improved after the promotion.
C1 adjective /steɪd/

staid

Meaning
Serious, respectable, and unadventurous.
Example
He came from a staid family background.
C2 adjective /ˈʃɪft.ləs/

shiftless

Meaning
Lacking ambition or the ability to accomplish anything; lazy and unmotivated.
Example
He was seen as a shiftless young man with no goals.
C2 adjective /ˈseɪpiənt/

sapient

Meaning
Wise, or appearing to be wise.
Example
The professor gave a sapient response to the complex question.
B1 noun ˈstrʌɡ.əl

struggle

Meaning
A forceful or violent effort to get free of restraint or resist attack; a determined effort under difficult circumstances.
Example
The struggle for independence united the nation.
B2 noun /ˈskaɪˌskreɪpər/

Skyscraper

Meaning
a very tall building of many stories
Example
The new skyscraper dominates the city's skyline.
B2 adjective /steɪl/

Stale

Meaning
no longer fresh; lacking originality or novelty
Example
The bread became stale after sitting out for three days.
C2 adjective /sɪˈnæp.tɪk/

synaptic

Meaning
Related to the signal transmission process between nerve cells.
Example
Learning strengthens synaptic connections in the brain.
B2 verb /skoʊld/

scold

Meaning
to criticize angrily; to rebuke
Example
The teacher scolded the students for being late.
A1 noun /skuːl/

school

Meaning
An institution for educating children; also a group of people sharing the same ideas or discipline.
Example
The children walked to school together.
B2 noun /ˈspɒnsər/

sponsor

Meaning
a person or organization that provides funds for a project or activity in exchange for publicity or support
Example
The company became the main sponsor of the event.
B2 noun /ˈskɒlərʃɪp/

scholarship

Meaning
an award or grant to support a student's education
Example
She received a scholarship to study abroad.
C1 adjective /ˈsɜːrvɪsəbl/

serviceable

Meaning
fit for use; usable; in working order
Example
The old bicycle is still serviceable despite its age.
B2 adjective /sɑːrˈkæstɪk/

sarcastic

Meaning
Using irony or mockery to convey contempt or humor.
Example
She made a sarcastic remark about his cooking.
C2 noun /ˈsɪnəd/

synod

Meaning
An assembly of the clergy in a Christian church convened to decide on issues of doctrine or administration.
Example
The synod gathered to discuss reforms in the church.
C1 noun səˌfɪs.tɪˈkeɪ.ʃən

sophistication

Meaning
High level of complexity or refinement.
Example
The sophistication of modern AI technology is remarkable.
B1 adverb /səkˈsɛsfəli/

successfully

Meaning
in a way that achieves a desired result
Example
She passed the exam successfully after weeks of studying.
B2 noun, verb /stɛm/

stem

Meaning
Noun: The main stalk of a plant. Verb: To stop or restrict the flow or development of something.
Example
The gardener cut the stem of the rose; New policies aim to stem the flow of pollution.
C2 adjective /ˌsuː.pər.ɪˈrɑː.ɡə.tɔːr.i/

supererogatory

Meaning
Going beyond what is required or expected; more than necessary.
Example
His donation was supererogatory, far beyond what anyone had asked for.
B1 adjective /sɪˈlek.tɪd/

selected

Meaning
carefully chosen from a group for a particular purpose
Example
He was one of the selected candidates for the scholarship.
B2 verb /sniːk/

sneak

Meaning
to move quietly and secretly to avoid being noticed
Example
He tried to sneak into the house without waking anyone.
B2 verb /səˈsteɪn/

sustain

Meaning
To support, maintain, or keep something going over time.
Example
The team worked hard to sustain their success.
C2 verb /sɪˈkwɛstreɪt/

sequestrate

Meaning
To take legal possession of assets until a debt is paid or disputes are resolved.
Example
The court decided to sequestrate the company's property.
B1 noun /ˈsʌp.ər/

Supper

Meaning
an evening meal, typically a light or informal one
Example
We usually have supper around seven o'clock.
C2 adjective /ˈsɒmnələnt/

somnolent

Meaning
Sleepy or drowsy; causing a desire to sleep.
Example
The somnolent lecture made half the class fall asleep.
C1 adjective /ˈstrætɪfaɪd/

stratified

Meaning
arranged or classified in layers or strata
Example
Society in the past was highly stratified based on class and wealth.
A2 noun /ʃeɪp/

Shape

Meaning
the external form or appearance of something; condition or state
Example
The artist drew a perfect circle shape on the canvas.
B1 verb səˈpɔːrtɪŋ

supporting

Meaning
Giving assistance to; helping to bear the weight of something.
Example
Supporting education initiatives helps reduce child labour.
B2 adjective /ˈstʌf.i/

Stuffy

Meaning
lacking fresh air; poorly ventilated; formal and conservative in attitude
Example
The room was stuffy and needed fresh air.
C1 adjective /ˈstrɪndʒənt/

stringent

Meaning
strict, precise, and exacting
Example
The government imposed stringent measures during the crisis.
A1 pronoun /ʃi/

she

Meaning
a female person or animal previously mentioned or easily identified
Example
She is going to the market to buy vegetables.
C1 adjective /stɔːntʃ/

staunch

Meaning
Loyal, committed, and firm in support.
Example
She is a staunch supporter of environmental protection.
B2 noun /ˈskɒl.ər/

Scholar

Meaning
a person who has studied a subject for a long time and knows a lot about it; an academic
Example
The renowned scholar published several books on ancient history.
B1 adjective /ˈsæt.ɪs.fæk.tər.i/

Satisfactory

Meaning
acceptable; meeting requirements; adequate
Example
The test results were satisfactory.
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.
B2 verb /stɪŋ/

sting

Meaning
to pierce with a sharp point; to cause sharp pain
Example
The bee stung him on his arm while he was gardening.
C1 adjective /swɑːv/

suave

Meaning
charming, confident, and elegant, often in a smooth or polished way
Example
He was a suave gentleman who impressed everyone at the party.
B1 adverb /səˈpraɪzɪŋli/

surprisingly

Meaning
in a way that causes surprise or amazement
Example
Surprisingly, she finished the entire project in just one day.
C1 adjective /sliːk/

sleek

Meaning
smooth, shiny, and stylish
Example
She drove a sleek black sports car.
A1 noun /ˈsɪstər/

sister

Meaning
a female sibling; a girl or woman in relation to other children of her parents
Example
My sister is coming to visit us next week.
B2 noun ˈsʌbstɪˌtut

substitute

Meaning
A person or thing acting or serving in place of another.
Example
Money cannot be a substitute for genuine happiness.
C1 noun ˈsʌfrɪdʒ

suffrage

Meaning
The right to vote in political elections; the principle of political representation.
Example
Universal suffrage was a key demand.
B2 adjective /ˈsɪk.li/

Sickly

Meaning
weak and unhealthy; prone to illness; appearing weak or pale
Example
The sickly child needed extra care and attention.
C2 verb /ˈstʌltɪfaɪ/

stultify

Meaning
to make someone or something appear foolish, or to hinder effectiveness and enthusiasm
Example
The repetitive tasks seemed to stultify the workers' creativity.
B2 noun /ˈsʌb.sɪ.di/

subsidy

Meaning
Financial assistance provided by government to reduce costs of goods or services.
Example
The government provides a fuel subsidy to control prices.
C2 adjective /səˈluːtəˌtɔri/

salutatory

Meaning
Relating to or expressing a greeting or an address, especially at the beginning of a speech.
Example
She delivered a salutatory address at the graduation ceremony.
B2 noun /ˈsɒr.oʊ/

Sorrow

Meaning
a feeling of deep distress caused by loss or disappointment
Example
His heart was filled with sorrow after the tragedy.
C1 adjective /sɔɪld/

soiled

Meaning
dirty or stained; not clean
Example
His clothes were soiled after playing in the mud.
B1 noun /ˈsɛt ʌp/

set-up

Meaning
The arrangement or organization of something; a planned structure or scheme
Example
The company presented a new set-up for the office layout.
C1 noun /ˈstændˌstɪl/

standstill

Meaning
a situation in which all movement or activity stops
Example
The traffic came to a standstill after the accident.
B1 noun /ˌsaʊθˈwɛst/

southwest

Meaning
the direction that is between south and west; a region in that direction
Example
They traveled to the southwest of the country for their vacation.
B2 noun /ˈsɜr.neɪm/

Surname

Meaning
a hereditary name common to all members of a family; family name
Example
Please write your first name and surname on the form.
B2 verb /ˈskrɪbəl/

scribble

Meaning
to write or draw carelessly or quickly
Example
The child scribbled all over the wall.
B2 verb /ˈʃætər/

shatter

Meaning
To break suddenly into many small pieces.
Example
The glass will shatter if you drop it.
A2 noun /skɪlz/

skills

Meaning
The ability to do something well; expertise.
Example
Learning new skills can increase personal and professional growth.
B1 noun /stiːl/

steel

Meaning
a strong, hard metal made of iron and carbon
Example
The building was made from steel to ensure its durability.
C2 noun /ˈstrɪplɪŋ/

stripling

Meaning
a young man who is not yet fully grown
Example
The stripling dreamed of becoming a brave knight.
C1 verb /ˈskruː.tɪ.naɪz/

scrutinize

Meaning
Examine or inspect closely and thoroughly.
Example
The scientist scrutinized the data before publishing his findings.
B2 noun /ˌsɛlf əˈwɛə.nəs/

self-awareness

Meaning
Conscious knowledge of one's own character, feelings, motives, and desires.
Example
Self-awareness helps in understanding one's emotions and actions.
B1 noun /stoʊv/

Stove

Meaning
a kitchen appliance used for cooking food by applying heat
Example
She cooked dinner on the gas stove.
B2 verb /slæp/

slap

Meaning
to hit someone quickly with the flat part of the hand; to strike sharply
Example
She was so angry that she slapped him across the face.
C1 noun ˈsɪn.tæks

syntax

Meaning
The arrangement of words and phrases to create well-formed sentences in a language.
Example
Programming languages follow strict syntax rules.
B2 noun /soʊl/

Sole

Meaning
the bottom part of the foot; the bottom part of a shoe
Example
I have a blister on the sole of my foot.
C2 adjective /ˈsuːpaɪn/

supine

Meaning
Lying on the back, face upward; failing to act due to laziness or weakness.
Example
He lay supine on the grass, staring at the stars.
A2 noun /sænd/

sand

Meaning
Small loose grains of crushed rock, found on beaches and deserts.
Example
Children built castles out of sand on the beach.
A1 noun /ˈʃɒpɪŋ/

shopping

Meaning
the activity of going to shops to buy things
Example
She spent the afternoon shopping for clothes.
A1 adjective /smɔːl/

Small

Meaning
little in size; not large; limited in extent or amount
Example
She lives in a small apartment near the university.
B1 adjective /spəˈsɪfɪk/

specific

Meaning
Clearly defined or identified; particular; exact.
Example
Make a specific plan to beat procrastination.
C2 noun /ˈsʌfərəns/

sufferance

Meaning
patient endurance of pain, hardship, or delay; passive consent or tolerance
Example
He lived in poverty with quiet sufferance.
C1 verb /ˈsʌkɪŋ/

sucking

Meaning
Drawing in a liquid, air, or other substance through the mouth or a tube by creating a vacuum; also used figuratively for something unpleasant or ineffective
Example
The baby is sucking on a pacifier.
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.
C2 adjective /ˈsæ.loʊ/

sallow

Meaning
Of an unhealthy yellow or pale brown color, often referring to skin.
Example
His sallow complexion made him look tired and sickly.
C2 adjective /sɛpˈtɛnɪəl/

septennial

Meaning
Occurring every seven years.
Example
The festival is a septennial tradition in the village.
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.
B2 verb /ˈsʌməraɪz/

summarize

Meaning
To give a brief statement of the main points of something
Example
She summarized the report in just a few minutes.
B2 noun /ˈʃəʊ.keɪs/

showcase

Meaning
A display case or exhibition; to present something in an attractive or favorable way.
Example
The exhibition showcased the artist's best works.
A2 adverb /ˈsʌm.weər/

Somewhere

Meaning
in or at some place; in an unspecified location
Example
I left my keys somewhere in the house.
B1 noun /ˌsaʊθˈiːst/

southeast

Meaning
the direction that is between south and east; a region in that direction
Example
The city is located in the southeast of the country.
C2 noun /ˈsweɪʒən/

suasion

Meaning
the act of persuading or influencing someone
Example
The leader used gentle suasion to win support for the plan.
A1 noun /ˈsɛvən/

seven

Meaning
the number following six and preceding eight
Example
She has seven apples in her basket.
C1 noun /səˈrɛn.ɪ.ti/

serenity

Meaning
The state of being calm, peaceful, and untroubled.
Example
Meditation helps in achieving inner serenity.
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.
B1 verb /spɛl/

spell

Meaning
to write or name the letters of a word in order; to mean or result in something
Example
Can you spell your name for me?
B2 noun /ˈsɒlɪtjuːd/

solitude

Meaning
The state or situation of being alone.
Example
Solitude can provide the opportunity for deep reflection.
A2 adjective /ˈsaɪ.lənt/

Silent

Meaning
making no sound; quiet; not speaking
Example
The library was completely silent during study hours.
C1 verb /ˈskʌt.əl/

scuttle

Meaning
To run hurriedly with short, quick steps; or to deliberately sink a ship.
Example
The children scuttled back to their seats when the teacher entered.
C1 noun /spɛk/

speck

Meaning
A very small spot, mark, or particle.
Example
There was a tiny speck of dust on the glass table.
C1 noun /ˈstɒpɪdʒ/

stoppage

Meaning
The act of stopping or ceasing; a halt in operation or activity
Example
The sudden stoppage of the train caused delays for all passengers.
A2 noun /ˈsuː.pəˌmɑː.kɪt/

supermarket

Meaning
a large self-service store selling food and household goods
Example
She went to the supermarket to buy groceries.
B2 noun /ˈsɛktər/

sector

Meaning
a distinct part or area of an economy, society, or industry
Example
The technology sector is growing rapidly.
B2 adjective /ˌsʌp.lɪˈmen.tər.i/

Supplementary

Meaning
completing or making an addition to something; additional; extra
Example
Students need to buy supplementary books for the course.
C2 noun /sɒl/

sol

Meaning
The fifth note of the sol-fa musical scale (do, re, mi, fa, sol, la, ti); also the Latin word for sun
Example
The choir practiced singing the note sol during rehearsal.
B2 noun /ˈsɑːrˌkæzəm/

sarcasm

Meaning
The use of irony to mock or convey contempt.
Example
His sarcasm often made people laugh but sometimes offended them.
B2 noun /sɛnˈseɪʃən/

Sensation

Meaning
a physical feeling or perception resulting from something that happens to or comes into contact with the body; a widespread reaction of interest and excitement
Example
The new singer became an overnight sensation.
C1 adjective /ˈseɪlaɪn/

Saline

Meaning
containing salt; salty; relating to salt water
Example
The saline solution is used for medical treatments.
C1 noun /stɛntʃ/

stench

Meaning
A very strong and unpleasant smell.
Example
The stench of garbage filled the alley.
B2 noun /spɑːrk/

Spark

Meaning
a small fiery particle thrown off from a fire; a flash of light; something that triggers or initiates
Example
A spark from the campfire ignited the dry leaves.
C1 noun/verb /spuːf/

spoof

Meaning
A humorous imitation of something, or to trick or parody someone or something.
Example
The comedian spoofed the politician’s speech to entertain the audience.
C1 adjective /ˈstɔːlwərt/

stalwart

Meaning
Loyal, reliable, and hardworking; strongly built or sturdy.
Example
She has always been a stalwart supporter of the community.
B2 noun /ˈsɪɡ.nə.tʃər/

Signature

Meaning
a person's name written in their own handwriting as identification or authorization
Example
Please put your signature at the bottom of the document.
C1 noun /ˈsʌn.stroʊk/

Sunstroke

Meaning
a serious condition caused by overheating from prolonged exposure to high temperatures
Example
The worker suffered from sunstroke after working outside all day.
C1 noun /ˈskaʊndrəl/

scoundrel

Meaning
a dishonest or unscrupulous person; a villain
Example
That scoundrel cheated the old man out of his savings.
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.
B1 noun/verb /skeɪl/

scale

Meaning
A system of ordered marks used for measurement; also means to climb or to adjust in size.
Example
The company plans to scale its operations globally.
B2 adjective /ˈspaɪ.rəl/

Spiral

Meaning
winding in a continuous curve; helical
Example
The spiral staircase led to the top floor.
A2 adjective /streɪt/

Straight

Meaning
extending or moving uniformly in one direction; not curved or bent; honest
Example
Draw a straight line from point A to point B.
C1 adjective /sɪər/

Sear

Meaning
withered; dried up; burned or scorched
Example
The sear leaves fell from the trees in autumn.