sinus
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C1 noun /ˈsaɪnəs/

sinus

Meaning
A cavity within a bone or tissue, especially those in the bones of the face connected with the nasal cavities.
Example
He suffered from a sinus infection that caused headaches.
C2 noun /ˌspoʊliˈeɪʃən/

spoliation

Meaning
The act of destroying or ruining something, often evidence or property.
Example
The court punished the company for the spoliation of evidence.
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.
C2 adjective /stɛnˈtɔːriən/

stentorian

Meaning
Extremely loud and powerful in sound.
Example
The teacher’s stentorian voice quieted the noisy classroom.
B2 noun ˈstɪmjələs

stimulus

Meaning
A thing or event that evokes a specific functional reaction in an organ or tissue.
Example
Plants respond to external stimulus.
B2 adjective /səkˈsɛsɪv/

Successive

Meaning
following one after the other in order; consecutive
Example
The team won three successive matches.
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 /ˈspraɪtli/

sprightly

Meaning
full of energy and life; lively
Example
The sprightly old man danced with joy at the wedding.
B2 noun /ˈsuː.ɪ.saɪd/

Suicide

Meaning
the act of intentionally killing oneself
Example
Mental health professionals work to prevent suicide.
B2 noun ˈsəʊ.lər ˈen.ə.dʒi

solar energy

Meaning
Energy from the sun that is converted into thermal or electrical energy.
Example
Solar energy is vital for reducing carbon emissions.
C2 verb /ˈsɛreɪt/

serrate

Meaning
To make a saw-toothed edge or notched margin.
Example
The craftsman serrated the knife blade for better cutting.
A1 noun /speɪs/

space

Meaning
The dimensions of height, depth, and width within which all things exist and move.
Example
Space exploration expands human knowledge.
C1 verb /skʌf/

scuff

Meaning
to mark or scratch the surface of something by rubbing
Example
He scuffed his shoes on the pavement.
B1 adverb /ˈsekəndli/

secondly

Meaning
Used to introduce the second point in a list of arguments or ideas.
Example
Firstly, we need funding; secondly, we need a strong team.
B1 noun /ˈspɪr.ɪt/

Spirit

Meaning
the non-physical part of a person; enthusiasm or courage; the essential character of something
Example
The team showed great spirit despite losing the match.
B2 verb /suː/

sue

Meaning
to bring a lawsuit against someone in a court of law
Example
She decided to sue the company for damages.
C1 adjective /ˈswɛltərɪŋ/

sweltering

Meaning
uncomfortably hot
Example
The sweltering heat made it hard to work.
A2 noun /seɪf/

Safe

Meaning
secure container for storing valuables; protection from danger
Example
He kept his important documents in the office safe.
C1 noun /skraɪb/

scribe

Meaning
a person who writes documents, especially in ancient times; a professional copyist
Example
In ancient Egypt, scribes recorded important events.
C1 noun /səˈsteɪnəbl ˈæɡrɪkʌltʃər/

sustainable agriculture

Meaning
Farming practices that meet current food needs while preserving environmental resources and maintaining the ability to produce food for future generations through ecologically sound methods.
Example
Sustainable agriculture practices protect the environment while ensuring food security.
A1 adjective /ʃɔːrt/

Short

Meaning
having a small length, height, or duration; not long
Example
The meeting was very short, lasting only ten minutes.
B2 noun ˈsəʊ.ʃəl ˈdʒʌs.tɪs

social justice

Meaning
Justice in terms of the distribution of wealth, opportunities, and privileges within a society.
Example
Social justice ensures equality of opportunity.
A1 noun /siː/

Sea

Meaning
a large body of salt water that covers most of the earth's surface
Example
We went swimming in the sea.
A1 noun /ˈswɪmɪŋ/

swimming

Meaning
the activity or sport of moving through water using the limbs
Example
Swimming is a great way to stay fit and healthy.
B2 noun /ˈspesɪmən/

Specimen

Meaning
an individual example of something; a sample collected for scientific study or testing
Example
The scientist collected a blood specimen for analysis.
B2 verb /ˈspɛʃəˌlaɪz/

specialize

Meaning
to focus on a particular subject or activity and become an expert in it
Example
He decided to specialize in cardiology.
B2 noun /ˈsɜːdʒən/

surgeon

Meaning
a doctor who performs medical operations
Example
The surgeon performed a complex heart operation.
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.
A2 noun /ˈsoʊldʒərz/

soldiers

Meaning
members of an army who serve their country in war or peace
Example
The soldiers marched proudly down the street.
C1 noun /ˌsæl.ɪ.naɪˈzeɪ.ʃən/

salinization

Meaning
The process of increasing salt content in soil.
Example
Excessive irrigation can cause salinization of farmland.
A2 adverb /ˈsɪm.pli/

Simply

Meaning
in a clear and easy way; merely; just
Example
I simply wanted to help you with your homework.
B2 verb /ˈsuːpərvaɪz/

supervise

Meaning
to watch and direct a person or activity to ensure things are done correctly
Example
The teacher supervises students during the exam.
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.
B1 adverb /spəˈsɪfɪkli/

specifically

Meaning
in a clear and exact way
Example
He was specifically asked to handle the finances.
B2 verb /spɛər/

spare

Meaning
To give something that one has extra of; to refrain from harming or killing.
Example
Could you spare me a few minutes of your time?
A1 adjective /sloʊ/

slow

Meaning
moving or happening at a low speed
Example
The car moved slowly down the street.
B2 noun /ˌsuːpərˈvɪʒən/

supervision

Meaning
the action or process of overseeing or managing something or someone
Example
The project was completed under the supervision of an experienced manager.
A1 verb /sɪŋ/

sing

Meaning
to make musical sounds with the voice
Example
She sings beautifully in the choir.
B2 verb /smæʃ/

smash

Meaning
to break something into pieces violently
Example
She smashed the glass in frustration.
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 adjective/verb /ˈsiːzənd/

seasoned

Meaning
Experienced in a particular activity; also, flavored with spices.
Example
She is a seasoned teacher with over 20 years of experience.
B2 noun /ˌsuː.pərˈstɪʃ.ən/

Superstition

Meaning
a belief or practice considered irrational or supernatural
Example
Breaking a mirror brings seven years of bad luck is a common superstition.
B2 noun, verb /steɪk/

stake

Meaning
A share or interest in a business or venture; to risk or support something of value.
Example
He has a major stake in the new company.
C1 verb /səˈlɪsɪt/

solicit

Meaning
to ask for or try to obtain something from someone
Example
The charity is soliciting donations for flood victims.
B2 noun /ˈstiː.mər/

Steamer

Meaning
a ship or boat powered by steam engines
Example
The old steamer crossed the river slowly.
A1 noun /ʃɜːrt/

Shirt

Meaning
a piece of clothing worn on the upper body with sleeves and buttons
Example
He wore a white shirt to the office.
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.
A2 adjective /sɪk/

Sick

Meaning
unwell; having a disease or illness; feeling nauseous
Example
She stayed home from work because she was feeling sick.
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 adjective /ˈsʌl.ki/

Sulky

Meaning
bad-tempered and sullen; moody
Example
The child became sulky when he couldn't get his favorite toy.
C1 noun /ˈʃær.ən fruːt/

Sharon fruit

Meaning
a sweet orange persimmon fruit that can be eaten when firm
Example
The Sharon fruit is sweet and can be eaten like an apple.
C2 noun /sʌbˈɔːl.tən/

subaltern

Meaning
A person holding a subordinate position; in the military, a junior officer.
Example
The subaltern was responsible for leading a small platoon of soldiers.
A1 noun /ˈstɔːri/

story

Meaning
a narrative of real or imaginary events
Example
She told a fascinating story about her travels.
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.
C2 noun /ˈstriːmlɪt/

streamlet

Meaning
a small stream; a tiny brook or rivulet
Example
A streamlet flowed through the meadow.
C1 verb /spɔːn/

spawn

Meaning
to produce or generate, often in large numbers
Example
The video game has spawned many sequels.
C1 verb /səbˈstænʃieɪt/

substantiate

Meaning
To provide evidence to support or prove the truth of something.
Example
The lawyer worked to substantiate the claims with solid evidence.
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.
B2 adjective /ˈsɛksi/

sexy

Meaning
sexually attractive or exciting
Example
She wore a sexy red dress to the party.
A2 preposition /sɪns/

since

Meaning
from a particular time in the past until now
Example
I have known her since childhood.
C2 noun /sfɛˈrɪsɪti/

sphericity

Meaning
The quality or state of being spherical; roundness.
Example
The sphericity of the ball made it roll smoothly on the ground.
C2 adjective /splɪˈnɛtɪk/

splenetic

Meaning
bad-tempered, irritable, spiteful
Example
His splenetic remarks offended everyone in the room.
C1 noun /ˌsɛlf əˌfɜːˈmeɪʃən/

self-affirmation

Meaning
The practice of affirming one's own worthiness and value as an individual.
Example
Daily self-affirmation can boost your confidence.
B2 noun /ˌsɒl.ɪˈdær.ə.ti/

Solidarity

Meaning
unity or agreement of feeling or action among individuals with a common interest
Example
The workers showed solidarity during the strike.
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.
B2 adverb /səˈfɪʃəntli/

sufficiently

Meaning
to an adequate degree or extent
Example
She studied sufficiently to pass the exam.
A2 noun /siːn/

scene

Meaning
a place or setting of an event or activity, or the part of a play or film
Example
The final scene of the movie was very emotional.
A1 adjective /ˈsɔːri/

sorry

Meaning
feeling regret or sympathy
Example
She felt sorry for what had happened.
C1 adverb spɒnˈteɪnɪəsli

spontaneously

Meaning
In a spontaneous way; naturally and without planning or external cause.
Example
Children learn spontaneously through peer interactions.
C2 noun /ʃiːt fɪʃ/

Sheat-fish

Meaning
A large freshwater catfish with a broad flat head and long barbels
Example
The sheat-fish is one of the largest freshwater fish in South Asia.
B2 verb /stɪə(r)/

steer

Meaning
to guide or control the movement of a vehicle, vessel, or person
Example
He steered the car carefully through the narrow street.
C1 verb /ˈstæɡ.neɪt/

stagnate

Meaning
to stop developing, progressing, or moving
Example
Without innovation, the business will stagnate.
A1 adjective /sæd/

sad

Meaning
feeling or showing sorrow; unhappy
Example
She felt sad after hearing the bad news.
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.
B1 noun/adjective /ˈsmoʊ.kɪŋ/

smoking

Meaning
The act of inhaling and exhaling the smoke of tobacco or other substances; wearing a tuxedo (adjective, formal context).
Example
Smoking is prohibited inside the building.
B2 noun /ˈsuːpəvaɪzə(r)/

supervisor

Meaning
a person who manages or directs the work of others
Example
The supervisor checked the progress of each employee.
A2 noun /saɪt/

sight

Meaning
the ability to see or something that is seen
Example
The sight of the sunset took her breath away.
B2 adjective /stɜːrn/

Stern

Meaning
serious and demanding exact conformity to rules; strict and severe
Example
The teacher gave the students a stern warning about cheating.
B1 adjective /ˈsʌm.wʌt/

Somewhat

Meaning
to some extent; rather; moderately
Example
The movie was somewhat interesting but not great.
B1 noun /ˈsɛkrəteri/

secretary

Meaning
a person employed to handle correspondence and manage routine tasks for an individual or organization
Example
The secretary scheduled the meeting for tomorrow.
B2 noun /ˈskɔːr.pi.ən/

Scorpion

Meaning
a small creature with eight legs, two claws, and a curved tail with a poisonous sting
Example
The scorpion hid under the rock during the day.
C2 adjective /sɪˈbeɪʃəs/

sebaceous

Meaning
Relating to or secreting sebum, an oily substance from the skin.
Example
Acne is often caused by overactive sebaceous glands.
A1 noun /ˈsʌmər/

summer

Meaning
the warmest season of the year, between spring and autumn
Example
We love going to the beach during summer.
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.
B2 noun /sərˈvaɪvər/

Survivor

Meaning
a person who survives, especially a person remaining alive after an event in which others have died
Example
She is a cancer survivor who now helps other patients.
A1 verb /stænd/

stand

Meaning
to be in an upright position; to tolerate or endure
Example
Please stand up when the teacher enters.
C1 verb /ˌsuːpərˈsiːd/

supersede

Meaning
To replace or take the place of something because it is more modern or effective.
Example
This new law will supersede the old regulations.
B2 verb /spɪl/

spill

Meaning
to cause liquid to flow or fall out of a container by accident
Example
Be careful not to spill your coffee.
A2 noun /stʌf/

stuff

Meaning
a collection of things or materials, typically unspecified or uncountable
Example
She packed all her stuff into the suitcase.
B2 adjective /ˈseɪ.krɪd/

Sacred

Meaning
connected with God or a god; considered holy; worthy of religious worship
Example
The sacred temple was visited by thousands of pilgrims.
C1 adjective /ˈsʌlən/

sullen

Meaning
bad-tempered and gloomy; silently resentful
Example
She gave him a sullen look and walked away.
B2 noun /sloʊp/

Slope

Meaning
an inclined surface; a piece of ground that is not level
Example
We walked up the steep slope of the mountain.
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.
C1 adjective /sɪmˈfɒnɪk/

symphonic

Meaning
relating to or having the character of a symphony or symphony orchestra
Example
The concert featured a symphonic masterpiece.
A1 verb /spik/

speak

Meaning
to say words; to communicate verbally
Example
She can speak three languages fluently.
B2 noun səbˈstænʃəl ˈɪmpækt

substantial impact

Meaning
A significant, considerable, and meaningful effect or influence.
Example
Substantial impact is possible even with a few hours of volunteering.
C2 verb /ˈsʌbdʒʊˌɡeɪt/

subjugate

Meaning
To bring under domination or control, especially by conquest.
Example
The empire sought to subjugate the neighboring kingdoms.
A2 noun /ˈsuːt.keɪs/

suitcase

Meaning
A portable rectangular container for carrying clothes and personal items when traveling
Example
She packed her clothes into a suitcase for the trip.
C1 noun /ʃæk/

Shack

Meaning
a small, crudely built dwelling; a poorly constructed building
Example
The fisherman lived in a small shack near the beach.
A2 verb /sɑːlv/

solve

Meaning
to find an answer to a problem or question; to resolve a difficulty
Example
The detective finally solved the mysterious case.
B2 verb /ʃɛd/

shed

Meaning
to let something fall off naturally, such as leaves, hair, or tears
Example
Trees shed their leaves in autumn.
B2 verb /ˈstɑːrtl/

startle

Meaning
To surprise or frighten someone suddenly.
Example
The loud noise startled the children.
C1 noun, adjective, verb /ʃæm/

sham

Meaning
something that is not what it appears to be; a false or fake thing; to pretend
Example
The deal turned out to be a sham.
B1 noun /sɒk/

sock

Meaning
a piece of clothing worn on the foot and lower part of the leg.
Example
He put on a pair of clean socks before leaving the house.
A2 noun /ˈsɪl.vər/

Silver

Meaning
a shiny white precious metal used for making jewelry and ornaments
Example
The silver ring sparkled in the sunlight.
C1 noun səˌsɛp.təˈbɪl.ə.ti

susceptibility

Meaning
The quality of being likely to be influenced or harmed by a particular thing; vulnerability.
Example
High susceptibility to infections requires extra care.
A2 noun /spiːd/

Speed

Meaning
the rate at which someone or something moves or operates
Example
The car reached a speed of 100 miles per hour.
C1 adjective /ˈsaɪz.mɪk/

seismic

Meaning
Relating to earthquakes or vibrations of the earth and its crust.
Example
The region is known for its seismic activity.
B2 noun /ˌsɪmjuˈleɪʃən/

simulation

Meaning
the imitation of a situation or process
Example
The simulation helped the students understand the complex theory.
C1 noun /ˈstætʃuːt/

statute

Meaning
A written law passed by a legislative body.
Example
The new statute protects workers' rights.
B2 noun, verb /skruː/

screw

Meaning
a metal fastener with a helical ridge; to fasten or tighten something with a screw
Example
He screwed the shelf to the wall tightly.
B2 noun/verb /stʌnt/

stunt

Meaning
a daring or unusual action performed for entertainment or publicity; to hinder growth or development
Example
The actor performed a dangerous stunt in the movie.
B2 noun /ˈsmɑːrt.nəs/

Smartness

Meaning
intelligence; cleverness; neat and fashionable appearance
Example
Her smartness in solving problems impressed everyone.
C1 verb /struː/

strew

Meaning
to scatter or spread things untidily over a surface or area
Example
Clothes were strewn across the floor.
B1 verb /sərˈvaɪv/

survive

Meaning
To continue to live or exist after a difficult event or situation.
Example
He managed to survive the storm.
C2 verb /ˈsʌn.dər/

sunder

Meaning
To split apart or separate, especially with force.
Example
The war sundered families and friends.
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.
C1 noun /ˈsaɪ.ən/

scion

Meaning
a descendant of a wealthy, aristocratic, or influential family
Example
He is the scion of a wealthy industrialist family.
C2 noun /ˈspɒt.ɪd sneɪk hed/

Spotted snake head

Meaning
a type of freshwater fish with spotted markings and an elongated head resembling a snake
Example
The spotted snake head is a popular fish for aquaculture in South Asia.
C1 adjective /ˈspɑːrtn/

spartan

Meaning
showing simplicity and lack of luxury; austere
Example
He lived in a spartan room with just a bed and a chair.
C2 noun /sɪˈrɒkoʊ/

sirocco

Meaning
A hot, dry wind blowing from North Africa across the Mediterranean to southern Europe.
Example
The sirocco made the city unbearably hot and dusty.