spheroid
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C2 noun /ˈsfɛrɔɪd/

spheroid

Meaning
A three-dimensional shape that is almost spherical but slightly flattened or elongated.
Example
The Earth is not a perfect sphere but an oblate spheroid.
B2 noun ˈsækrɪfaɪs

sacrifice

Meaning
An act of giving up something valued for the sake of something else.
Example
The country was freed due to the sacrifice of the warriors.
B1 noun /seɪnt/

Saint

Meaning
person recognized as holy or virtuous; very kind or patient person
Example
Mother Teresa was declared a saint by the Catholic Church.
C1 noun /ˈspɛktər/

specter

Meaning
A ghost or spirit; something that causes fear or dread.
Example
The specter of war still haunts the region.
C1 verb, noun /sæp/

sap

Meaning
As a noun: the vital fluid in plants; As a verb: to gradually weaken or drain strength.
Example
The long journey began to sap his energy.
A1 adjective /sæd/

sad

Meaning
feeling or showing sorrow; unhappy
Example
She felt sad after hearing the bad news.
C1 noun /səˈlaɪ.və/

Saliva

Meaning
the watery liquid secreted into the mouth by glands
Example
The dentist asked her to rinse the saliva from her mouth.
B1 noun /slaɪd/

Slide

Meaning
a smooth surface for sliding down; a piece of playground equipment
Example
The children enjoyed playing on the slide at the park.
C1 verb /ˈstaɪfəld/

stifled

Meaning
to suppress, hold back, or prevent something from happening
Example
He stifled a laugh during the serious meeting.
C1 noun ˈstræt.ə.sfɪər

stratosphere

Meaning
The layer of the earth's atmosphere above the troposphere, extending to about 50 km above the earth's surface.
Example
The stratosphere provides a unique environment.
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.
B1 noun, verb /spoʊk/

spoke

Meaning
As a noun, a bar connecting the center of a wheel to its rim; as the past tense of 'speak'.
Example
The bicycle's spoke was bent after the accident.
B2 noun /spekˈteɪtər/

Spectator

Meaning
a person who watches at a show, game, or other event; an observer
Example
The stadium was filled with excited spectators.
C1 noun /səbˈdʒɛkʃən/

subjection

Meaning
the act of bringing someone or something under control or domination
Example
The people suffered under the subjection of a cruel ruler.
B1 verb /skɪp/

skip

Meaning
to omit or pass over something; to move lightly or quickly
Example
He decided to skip breakfast and go straight to work.
C2 noun /ˈsʌplɪkənt/

supplicant

Meaning
A person who humbly or earnestly asks for something, usually from a person of authority.
Example
The temple was filled with supplicants seeking blessings.
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.
C1 adjective /ˈspɪndli/

spindly

Meaning
Long, thin, and weak-looking
Example
The spindly tree bent under the weight of the snow.
B2 noun ˈsɛv.ən ˈwʌn.dərz

Seven Wonders

Meaning
The seven most remarkable and famous structures in the world, representing architectural feats and cultural significance.
Example
The Seven Wonders of the world reflect human brilliance.
C2 noun /spjuːm/

spume

Meaning
Froth or foam, especially found on waves or liquids.
Example
The waves crashed against the rocks, leaving spume in the air.
B2 verb ˈsiːlɪŋ

sealing

Meaning
The action of closing or blocking something to prevent entry or escape.
Example
Sealing cracks in the walls can prevent pests from entering.
B2 adjective spekˈtækjʊlər

spectacular

Meaning
Beautiful in a dramatic and eye-catching way; very impressive.
Example
The launch of the spacecraft was a spectacular event.
A2 noun /skɪn/

Skin

Meaning
the outer covering of the body; the natural outer covering of a fruit or vegetable
Example
Her skin was soft and smooth.
B1 noun /ˈsɛkʃən/

section

Meaning
a distinct part or subdivision of something larger
Example
This section of the report needs further review.
B2 noun, verb /stiːm/

steam

Meaning
the vapor into which water is converted when heated; to emit or treat with steam
Example
The kettle was steaming on the stove.
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.
A2 noun /ˈsɪŋ.ər/

Singer

Meaning
a person who sings, especially as a job or profession
Example
The singer performed beautifully at the concert last night.
C1 noun/verb /sleɪt/

slate

Meaning
a fine-grained rock used for roofing or writing; to schedule or designate for a task
Example
The meeting is slated for next Monday.
C1 verb /skɒf/

scoff

Meaning
to speak about something in a mocking or dismissive way
Example
He scoffed at the idea of moving abroad.
C2 noun /ˈsɛrəf/

seraph

Meaning
An angelic being associated with light and purity, often depicted as a high-ranking angel in Christian theology.
Example
The stained-glass window depicted a seraph with outstretched wings.
C2 noun /ˈʃʊərəti/

surety

Meaning
a person who takes responsibility for another's performance of an undertaking, such as appearing in court or paying a debt
Example
The landlord required a surety before renting the apartment.
B2 noun /ˈspəʊksmən/

spokesman

Meaning
a person who speaks on behalf of others, especially for a group or organization
Example
The spokesman addressed the crowd during the rally.
A2 noun /smɔːl boʊl/

Small bowl

Meaning
a round, shallow container of small size used for serving food or liquids
Example
She served the soup in a small bowl.
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.
A2 noun /ʃiːp/

sheep

Meaning
a farm animal with thick wool that is raised for its wool, meat, and milk
Example
The farmer keeps a large flock of sheep.
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.
B2 noun sliːp ˌdɛprɪˈveɪʃən

sleep deprivation

Meaning
The condition of not having enough sleep; lack of adequate sleep.
Example
Sleep deprivation can severely impact mental health.
A1 verb /smaɪl/

smile

Meaning
to express happiness or friendliness by turning the corners of the mouth upwards
Example
She smiled when she saw the gift.
C2 adjective /ˈsfɪŋks laɪk/

sphinx-like

Meaning
Mysterious, enigmatic, or difficult to interpret
Example
Her sphinx-like smile made it hard to guess what she was thinking.
C1 verb /səˈkʌm/

succumb

Meaning
To give in to pressure, temptation, or illness; to yield or fail to resist.
Example
He finally succumbed to his illness after a long struggle.
B2 noun /ˈstiː.mər/

Steamer

Meaning
a ship or boat powered by steam engines
Example
The old steamer crossed the river slowly.
B2 adjective /suːˈpɜːrb/

superb

Meaning
extremely good; excellent
Example
The hotel provided superb service during our stay.
A2 verb /stɔːr/

store

Meaning
to keep things in a place for future use; to save information
Example
She stores her winter clothes in the attic.
C2 noun /sɛnˈsɔːrɪəm/

sensorium

Meaning
The part of the brain or mind concerned with the reception and interpretation of sensory stimuli.
Example
The patient’s sensorium was clouded after the accident.
B2 noun ˈsæt.əl.aɪt

satellite

Meaning
An artificial object which has been intentionally placed into orbit around a celestial body.
Example
Satellites provide critical data for research.
C2 noun /ˈseɪpiəns/

sapience

Meaning
Wisdom or intelligence.
Example
Her sapience in solving problems earned her the respect of her colleagues.
B2 adverb /ˈsɪmɪlərli/

similarly

Meaning
in a similar way
Example
Similarly, we can achieve success with dedication and hard work.
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.
C1 noun /sɪˈdʌk.ʃən/

Seduction

Meaning
the action of seducing someone; temptation to do something wrong
Example
He fell victim to the seduction of easy money.
B2 noun /səkˈsɛʃ.ən/

succession

Meaning
The process of ecological change in which one community of organisms is gradually replaced by another.
Example
Forest succession occurs when old ecosystems are replaced by new ones.
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.
C2 noun /ˈsɪlvər kɑrp/

Silver carp

Meaning
a large freshwater fish with silvery scales, commonly farmed for food
Example
Silver carp is widely cultivated in fish farms across Asia.
B2 noun, verb /striːk/

streak

Meaning
a long, thin line or mark; to move very quickly in a specified direction
Example
Lightning streaked across the night sky.
B2 adjective /ˈspaɪ.rəl/

Spiral

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

Sauce

Meaning
a liquid or semi-liquid substance served with food to add moisture and flavor
Example
She added tomato sauce to her pasta.
C2 adjective /ˌsæpəˈneɪʃəs/

saponaceous

Meaning
Soapy or having the qualities of soap.
Example
The plant has saponaceous leaves that produce foam when rubbed in water.
A2 adjective /ʃaɪ/

Shy

Meaning
nervous or timid in the company of other people
Example
The shy student rarely spoke up in class discussions.
C1 verb /smɜrk/

smirk

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

Sear

Meaning
withered; dried up; burned or scorched
Example
The sear leaves fell from the trees in autumn.
C1 verb /sɪˈdjuːs/

seduce

Meaning
to attract someone into doing something, especially something they might not normally do
Example
The advertisement was designed to seduce customers into buying luxury products.
C2 adjective /ˈsed.j ə.l ə s/

Sedulous

Meaning
showing dedication and diligence; persistent and careful in work
Example
She was sedulous in her research, spending hours in the library every day.
C2 noun /səbˈdʌk.ʃən/

subduction

Meaning
The lateral and downward movement of the edge of a plate of the earth's crust into the mantle beneath another plate.
Example
The Pacific Ring of Fire is an area of intense subduction.
C1 noun /ˈskævɪndʒər/

scavenger

Meaning
an animal or person that feeds on dead or discarded material
Example
Vultures are natural scavengers that clean up the environment.
C1 adjective /ˈsʌbstəntɪv/

substantive

Meaning
Having a firm basis in reality; important, meaningful, or considerable.
Example
The company made substantive changes to its policy.
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.
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 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.
B2 adjective /ˈʃɔːrt ˌsaɪtɪd/

Short-sighted

Meaning
lacking foresight or consideration for the future; myopic
Example
His short-sighted decision to quit school early affected his career prospects.
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 verb /slɪŋk/

slink

Meaning
to move quietly and secretly, often to avoid being noticed
Example
The cat slunk into the room without making a sound.
C1 noun /ˈskeɪ.biːz/

Scabies

Meaning
a contagious skin disease caused by mites that causes intense itching
Example
The doctor diagnosed him with scabies after examining the rash.
C1 noun /ˈstɪklər/

stickler

Meaning
a person who insists on a certain quality or standard of behavior
Example
He is a stickler for punctuality and never tolerates delays.
A2 noun /ˈsɪk.nəs/

Sickness

Meaning
the state of being ill; a disease or illness
Example
She took time off work due to sickness.
A2 adjective /səkˈsɛsfəl/

Successful

Meaning
having achieved a desired aim or result; prosperous
Example
She was successful in her career as a doctor.
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 noun /səˈrɛn.ɪ.ti/

serenity

Meaning
The state of being calm, peaceful, and untroubled.
Example
Meditation helps in achieving inner serenity.
B2 noun /ˈsɛm.iˌsɜːr.kəl/

semicircle

Meaning
Half of a circle or something shaped like half of a circle.
Example
The students sat in a semicircle around the teacher.
B2 noun /ˈsliːpər/

sleeper

Meaning
a person or thing that sleeps; something that unexpectedly succeeds
Example
The movie turned out to be a real sleeper hit.
B2 noun /ˈskaɪˌskreɪpər/

Skyscraper

Meaning
a very tall building of many stories
Example
The new skyscraper dominates the city's skyline.
C2 noun /ˈʃɪbəˌlɛθ/

shibboleth

Meaning
A custom, phrase, or belief distinguishing a particular group of people, often used to identify outsiders.
Example
The phrase became a political shibboleth during the campaign.
A2 adjective /ˈskeəri/

scary

Meaning
causing fear or making you feel frightened
Example
That horror movie was really scary.
C1 noun /ˈstreɪnər/

Strainer

Meaning
a device having holes punched in it or made of crossed wires for separating solid matter from a liquid
Example
Use a strainer to drain the pasta water.
B1 noun /ˈsæm.pəl/

Sample

Meaning
a small part taken as an example of the whole; a specimen
Example
The doctor took a blood sample for testing.
C1 noun /ˈskaɪ.lɑːrk/

Sky-Lark

Meaning
a small brown bird known for singing while flying high in the sky
Example
The skylark sang beautifully as it soared above the meadow.
B2 verb /spreɪ/

spray

Meaning
to apply liquid to something in a fine mist
Example
She sprayed perfume on her wrist before leaving.
C2 adjective /ˈsætərˌnaɪn/

saturnine

Meaning
slow and gloomy in mood
Example
His saturnine expression made everyone in the room uncomfortable.
C1 adjective ˈsɒvrɪn

sovereign

Meaning
Possessing supreme or ultimate power; independent.
Example
The sovereign government has control over its currency.
B2 verb /spɪn/

spin

Meaning
To turn around quickly or cause something to rotate
Example
The dancer began to spin gracefully on the stage.
C1 adjective /ˈsɜːrvɪsəbl/

serviceable

Meaning
fit for use; usable; in working order
Example
The old bicycle is still serviceable despite its age.
C2 adjective /ˈsɪnjuːi/

sinewy

Meaning
Lean and muscular; strong and tough.
Example
The athlete had a sinewy build that showed his strength.
C1 verb /spɔːn/

spawn

Meaning
to produce or generate, often in large numbers
Example
The video game has spawned many sequels.
B2 noun/verb /swɑːmp/

swamp

Meaning
An area of low-lying, uncultivated ground where water collects; a bog or marsh.
Example
The village was built near a swamp.
C1 noun səbˈsɪs.təns

subsistence

Meaning
The action or fact of maintaining or supporting oneself at a minimum level.
Example
Many farmers depend on subsistence agriculture.
B1 adjective /səˈfɪʃənt/

Sufficient

Meaning
enough; adequate for the purpose; satisfactory
Example
We have sufficient time to complete the project.
C1 noun /spæt/

spat

Meaning
a short, petty quarrel or argument
Example
They had a brief spat about who should do the dishes.
C2 noun /ˈsaɪ.ə.lɪz.əm/

sciolism

Meaning
pretentious show of superficial knowledge
Example
His speech was full of sciolism, impressing no one.
A2 noun/verb/adjective /ˈsʌbdʒɪkt/ (noun), /səbˈdʒɛkt/ (verb)

subject

Meaning
noun: a topic or theme; verb: to cause to undergo; adjective: dependent or under authority
Example
The teacher introduced a new subject in class.
A2 noun /ˈswɛtər/

sweater

Meaning
a warm knitted piece of clothing worn on the upper body
Example
She wore a red sweater to keep warm in the cold weather.
C1 noun /ˈskæf.əld/

Scaffold

Meaning
a temporary structure used by workers to stand on when building or repairing something high; a platform for execution
Example
The workers erected a scaffold to paint the building's exterior.
C1 adjective /ˈsɛptɪk/

septic

Meaning
Infected with harmful bacteria; relating to or causing infection.
Example
The doctor treated the patient's septic wound immediately.
B2 noun /swiːt/

suite

Meaning
a set of rooms designated for one person's or family's use or for a particular purpose
Example
They stayed in the presidential suite at the hotel.
C1 adjective ˌsəʊsɪəʊpəˈlɪtɪkəl

sociopolitical

Meaning
Combining social and political factors.
Example
Sociopolitical factors often influence public policy decisions.
B2 noun ˌsɛlf ˈdɪs.ə.plɪn

self-discipline

Meaning
The ability to control one's emotions and behavior.
Example
Self-discipline is crucial for achieving long-term success.
C2 noun /ˈsteɪtkraft/

statecraft

Meaning
The art of governing and managing state affairs effectively.
Example
The leader was praised for his exceptional statecraft in handling international relations.
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.
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.
A1 verb /stɑːrt/

start

Meaning
to begin something; to commence; to initiate
Example
Let's start the meeting now.
B1 adjective /ˈsætɪsfaɪd/

satisfied

Meaning
Pleased or content with what has been achieved or received.
Example
He felt satisfied after finishing his project.
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 noun /sʌˈmeɪʃən/

summation

Meaning
The process of adding things together; a summary of points.
Example
The lawyer gave a powerful summation of the case.
C1 adjective /ˈsɪnləs/

Sinless

Meaning
free from sin; pure and innocent; without moral fault
Example
The innocent child appeared sinless in her pure white dress.
A2 noun /ʃer/

Share

Meaning
a portion of something; a part or portion of a larger amount
Example
Each partner received an equal share of the company profits.
C1 noun, adjective, verb /səˈbɔːrdənət/ (noun/adjective), /səˈbɔːrdəˌneɪt/ (verb)

subordinate

Meaning
lower in rank or position; to treat as less important
Example
He manages ten subordinates in his department.
B1 noun /stæf/

staff

Meaning
a group of employees working together in an organization
Example
The staff at the hospital are very helpful.
C1 noun /ˈstætʃuːt/

statute

Meaning
A written law passed by a legislative body.
Example
The new statute protects workers' rights.
B2 noun (plural) /skræps/

scraps

Meaning
Small pieces left over from something; also small fights or quarrels.
Example
The dog ate the scraps from the table.
B2 noun ˈsiːzənəl ˈvedʒtəbəlz

seasonal vegetables

Meaning
Vegetables that grow during specific seasons or times of the year
Example
Seasonal vegetables grow abundantly in winter.
C1 noun səˌfɪs.tɪˈkeɪ.ʃən

sophistication

Meaning
High level of complexity or refinement.
Example
The sophistication of modern AI technology is remarkable.
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 /stəˈkɑː.təʊ/

staccato

Meaning
short and detached in sound or style, often used in music
Example
The pianist played the notes in a staccato rhythm.
C1 noun /ˈsɪk.əl/

Sickle

Meaning
a tool with a curved metal blade and short handle used for cutting grain crops
Example
The farmer harvested wheat using a traditional sickle.