simulation
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B2 noun /ˌsɪmjuˈleɪʃən/

simulation

Meaning
the imitation of a situation or process
Example
The simulation helped the students understand the complex theory.
C2 verb /ˈsʌk.əl/

suckle

Meaning
to feed a baby or young animal with milk from the breast or udder
Example
The mother cat suckled her kittens in the basket.
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.
B1 verb /siːk/

seek

Meaning
to try to find or obtain something; to attempt or desire to achieve
Example
He decided to seek advice from his mentor.
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.
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 /ˈspiːʃiː/

specie

Meaning
money in the form of coins rather than notes or credit
Example
The transaction was made in specie.
A2 noun /ˈspaɪ.dər/

Spider

Meaning
a small creature with eight legs that makes webs to catch insects
Example
The spider caught a fly in its web.
B2 noun /ˈsɑːfmɔːr/

sophomore

Meaning
a student in their second year of study at a university or high school
Example
He’s a sophomore in college, studying computer science.
C1 noun ˈsʌs.tɪ.nəns

Sustenance

Meaning
Food or support necessary for sustaining life
Example
Water is essential for human sustenance.
B2 verb /spreɪ/

spray

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

suavity

Meaning
smoothness and charm in manner
Example
His suavity made him popular in social gatherings.
B1 noun /ˈspæroʊ/

Sparrow

Meaning
small brown and grey bird commonly found in cities and towns
Example
The sparrow chirped cheerfully from the tree branch.
B2 noun /ˈsɛtlər/

settler

Meaning
a person who settles in a new area or land
Example
The settlers arrived in the new town and started building homes.
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.
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.
C1 verb /snɪp/

snip

Meaning
to cut something quickly with scissors or a sharp tool
Example
She snipped the loose thread from her dress.
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.
C2 adjective /səˈdʒɛstəbəl/

suggestible

Meaning
easily influenced by the suggestions of others
Example
Children are highly suggestible and may believe what they are told.
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.
A2 noun /ʃiːt/

sheet

Meaning
a large piece of cloth or paper, typically used to cover or protect something
Example
I need a clean sheet to cover the bed.
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.
A2 adjective /sər'praɪzd/

Surprised

Meaning
feeling or showing surprise; astonished
Example
I was surprised to see my old friend at the market.
B2 verb /ˈspɛkjʊˌleɪt/

speculate

Meaning
To form a theory or guess without firm evidence; to invest in stocks, property, etc. hoping for profit.
Example
Experts speculate that the company may expand into new markets.
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 verb /seɪv/

save

Meaning
to rescue from danger; to keep for future use
Example
It's important to save money for emergencies.
B2 noun sɛlf rɪˈlaɪ.əns

self-reliance

Meaning
Reliance on one's own powers and resources rather than those of others; independence.
Example
Self-reliance helps build confidence.
B2 adjective /ˈspɒtɪd/

Spotted

Meaning
having spots or marks; noticed or seen
Example
The spotted leopard moved silently through the jungle.
C1 adjective /ˈsteɪtli/

stately

Meaning
Having a dignified, majestic, and impressive appearance or manner.
Example
The stately mansion stood at the end of the long driveway.
A2 verb /ʃʌt/

shut

Meaning
to close something, especially a door or window
Example
Please shut the door before you leave.
C1 verb /səˈfɪstɪkeɪt/

sophisticate

Meaning
to make something more complex or refined; to educate or develop in taste and manners
Example
Traveling abroad helped sophisticate his worldview.
B2 noun /ˈsɪɡ.nəlz/

signals

Meaning
A gesture, action, or sound conveying information or instructions.
Example
Signals from deep space were detected last week.
B1 adjective /slaɪt/

Slight

Meaning
small in degree; not severe or intense; slim; thin
Example
There was a slight delay in the train schedule.
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.
B1 adjective /səˈfɪʃənt/

Sufficient

Meaning
enough; adequate for the purpose; satisfactory
Example
We have sufficient time to complete the project.
A2 adjective /ˈsʌdən/

Sudden

Meaning
happening or done quickly and unexpectedly; abrupt
Example
There was a sudden change in the weather.
B2 adjective /ˈstɑː.ri/

Starry

Meaning
full of stars; shining like stars; relating to stars
Example
We enjoyed the starry night sky while camping in the mountains.
B2 adjective /ˈskɛptɪkəl/

skeptical

Meaning
not easily convinced; having doubts or reservations
Example
She was skeptical about the new plan.
C1 adjective /ˈʃeɪp.ləs/

Shapeless

Meaning
having no definite or well-defined shape or form
Example
The fog created a shapeless mass in the distance.
C2 noun /sfɪˈrɒmɪtər/

spherometer

Meaning
An instrument used for measuring the curvature of spherical surfaces.
Example
The scientist used a spherometer to measure the lens curvature.
A2 adjective /ˈsɪr.i.əs/

Serious

Meaning
thoughtful; grave; requiring careful consideration; not joking
Example
This is a serious matter that needs immediate attention.
C1 verb /skʌlpt/

sculpt

Meaning
to create or shape something by carving or molding
Example
The artist sculpted a beautiful statue from marble.
B2 noun /spaɪt/

spite

Meaning
a desire to hurt, annoy, or offend someone
Example
She refused the gift out of spite.
B2 verb /ˈstɑːrtl/

startle

Meaning
To surprise or frighten someone suddenly.
Example
The loud noise startled the children.
C2 adjective /ˌsuː.pɚˈsɪl.i.əs/

supercilious

Meaning
Behaving or looking as though one thinks one is superior to others; arrogant and disdainful.
Example
She gave him a supercilious smile as if he was beneath her.
C2 adjective /sɪˈdɪʃəs/

seditious

Meaning
Encouraging rebellion against authority.
Example
The activist spread seditious pamphlets among the crowd.
C1 adjective /snaɪd/

snide

Meaning
mocking or insulting in an indirect way
Example
He couldn’t resist making a snide comment about her dress.
A2 noun /stɛə/

stair

Meaning
a step or set of steps leading from one level to another
Example
He tripped on the stair and fell down.
A1 verb /sliːp/

sleep

Meaning
to rest with eyes closed and reduced consciousness; to be inactive
Example
I need to sleep for eight hours every night.
C1 noun /ˈsʌnˌdaʊn/

sundown

Meaning
the time in the evening when the sun goes below the horizon
Example
We planned to reach the village before sundown.
C1 adjective /ˈsɛnʃuəl/

sensual

Meaning
Relating to or involving gratification of the senses and physical pleasure.
Example
The painting had a sensual quality that captivated viewers.
C2 adjective /sɪmˈfoʊniəs/

symphonious

Meaning
Harmonious; producing a pleasant sound or agreement of sound.
Example
The choir's voices were symphonious and filled the hall with beauty.
B2 noun/verb /ˈsoʊ.ɪŋ/

sewing

Meaning
The activity or skill of joining fabric using a needle and thread
Example
She enjoys sewing her own clothes on weekends.
B1 adjective ˈsen.sɪ.tɪv

sensitive

Meaning
Quick to detect or respond to slight changes, signals, or influences.
Example
Sensitive systems require precise handling.
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.
C2 verb /ˌsuːpərˈæn.ju.eɪt/

superannuate

Meaning
to retire someone with a pension, usually due to age or long service
Example
The company decided to superannuate its senior employees after thirty years of service.
C1 adjective /ˈsɔːrdɪd/

sordid

Meaning
involving immoral or dishonorable actions; dirty or unpleasant
Example
The newspaper exposed the politician's sordid past.
B2 noun /ˈsɪnənɪm/

Synonym

Meaning
a word or phrase that means exactly or nearly the same as another word or phrase in the same language
Example
Happy and joyful are synonyms.
A2 noun /ˈspiːkər/

speaker

Meaning
a person who speaks or talks, especially as an occupation
Example
The speaker delivered an inspiring speech at the conference.
C2 noun /ˌsuː.pər.əˈbʌn.dəns/

superabundance

Meaning
An excessive or overflowing amount of something.
Example
The garden was filled with a superabundance of flowers.
C2 noun /slaɪt/

sleight

Meaning
Skill or dexterity, especially in performing tricks.
Example
The magician amazed the crowd with his sleight of hand.
C2 adjective /ˈsɪlvən/

sylvan

Meaning
Relating to or characteristic of the woods or forest.
Example
The cottage was set in a sylvan landscape full of tall trees.
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.
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.
C1 noun /səbˈvɜːrʒən/

subversion

Meaning
the act of trying to destroy or undermine an established system or authority
Example
The government accused the rebels of planning subversion.
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.
C1 verb /ˈsnɪkər/

snicker

Meaning
to laugh quietly in a disrespectful or mocking way
Example
The students snickered when the teacher made a mistake.
B2 noun /ˈstrʌk.tʃərz/

structures

Meaning
Buildings or other objects constructed from several parts.
Example
The region has ancient structures.
A2 noun /ˈsɛlər/

seller

Meaning
a person who sells something
Example
The seller offered a discount on bulk purchases.
C2 adjective /sæŋˈɡwɪniəs/

sanguineous

Meaning
Relating to blood; bloody.
Example
The surgeon examined the sanguineous discharge from the wound.
A2 preposition /sɪns/

since

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

sacristy

Meaning
a room in a church where sacred vessels and vestments are kept
Example
The priest entered the sacristy before the mass began.
C1 verb /swɜːrv/

swerve

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

speck

Meaning
A very small spot, mark, or particle.
Example
There was a tiny speck of dust on the glass table.
A2 noun /stɛp/

step

Meaning
a movement made by lifting one foot and putting it down in a new position
Example
She took a step towards the door.
A2 proper noun /ˌsaʊθ əˈmɛrɪkə/

south america

Meaning
a continent located in the Western Hemisphere, mostly in the Southern Hemisphere
Example
Brazil is the largest country in South America.
C1 verb /ʃɜːrk/

shirk

Meaning
to avoid or neglect a duty or responsibility
Example
He always tries to shirk his responsibilities at work.
C1 adjective /ˈspaɪni/

spiny

Meaning
covered with or full of spines; having sharp points
Example
The spiny cactus stood tall in the desert.
C2 adjective /stɛnˈtɔːriən/

stentorian

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

substantially

Meaning
to a great extent or degree
Example
The new policy has substantially improved working conditions.
A2 noun /soʊp/

Soap

Meaning
a cleaning agent made from fats or oils and used for washing
Example
Please wash your hands with soap and water.
B2 noun /suː.pɪər.iˈɔːr.ə.ti/

Superiority

Meaning
the quality or state of being superior; higher rank or quality
Example
His superiority in mathematics was evident from his test scores.
C1 noun /ˈsiːskeɪp/

seascape

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

sanctity

Meaning
The state or quality of being holy, sacred, or saintly; ultimate importance.
Example
The sanctity of life should never be compromised.
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.
C2 adjective /ˌsʌb.əˈkwɒt.ɪk/

subaquatic

Meaning
Existing, living, or located under water.
Example
Divers explored the subaquatic cave system filled with rare fish.
C2 noun /ʃiːf/

sheaf

Meaning
a bundle of grain stalks laid lengthwise and tied together after reaping; a bundle of objects tied together
Example
The farmer carried a sheaf of wheat on his shoulder.
B1 noun/adjective /ˈstændɪŋ/

standing

Meaning
status, reputation, or position; also the act of being upright on the feet
Example
He has high standing in the community for his charity work.
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 verb /ˈsmʌðər/

smother

Meaning
to kill someone by covering their nose and mouth to prevent breathing; to cover something completely; to overwhelm with excessive attention or affection
Example
She smothered the fire with a blanket.
A1 adverb /ˈsʌm.taɪmz/

Sometimes

Meaning
at times; occasionally; now and then
Example
Sometimes I go for a walk in the evening.
C1 adjective /ˈskrɔːni/

scrawny

Meaning
very thin and bony, often looking unhealthy
Example
The scrawny boy could barely lift the heavy bag.
A2 modal verb /ʃæl/

shall

Meaning
used to express the future or indicate an intention or determination
Example
I shall return before sunset.
C2 noun /ˈsɪŋ.krə.ni/

synchrony

Meaning
Coordination in time, harmony in action or movement.
Example
Their dance performance showed perfect synchrony.
C1 noun /ˈsəʊdiəm/

sodium

Meaning
a soft, silver-white chemical element that is highly reactive and found in salt.
Example
Sodium is an essential element for maintaining fluid balance in the body.
C1 adjective skiˈmæt.ɪk

Schematic

Meaning
Presenting some framework or concept briefly
Example
The engineer provided a schematic diagram of the project.
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.
A1 noun /striːt/

street

Meaning
a public road in a city or town, typically with buildings on one or both sides
Example
He walked down the street to the park.
C2 noun /ˈskɪnˌflɪnt/

skinflint

Meaning
a person who spends as little money as possible; a miser
Example
The landlord was such a skinflint that he never repaired anything.
B1 noun /swet/

Sweat

Meaning
moisture exuded through the pores of the skin, typically as a reaction to heat, physical exertion, fever, or fear
Example
After running for an hour, he was covered in sweat.
B2 verb, noun /sniːz/

sneeze

Meaning
to expel air involuntarily from the nose and mouth due to irritation; the act of sneezing
Example
I had to sneeze during the meeting.
C1 adjective /ˈsʌbstəntɪv/

substantive

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

Supreme

Meaning
highest in rank, authority, or quality; greatest; most important
Example
The Supreme Court made the final decision.
B2 noun /ˈsʌ.plɪ.mənt/

Supplement

Meaning
something that completes or adds to something else; a dietary product
Example
She takes vitamin supplements to maintain her health.
C1 verb /ˈskævɪndʒ/

scavenge

Meaning
to search through waste or discarded material to find useful items
Example
The children scavenged for food in the garbage dump.
B1 adjective /ˈsæt.ɪs.fæk.tər.i/

Satisfactory

Meaning
acceptable; meeting requirements; adequate
Example
The test results were satisfactory.
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.
A2 adjective /smuːð/

Smooth

Meaning
having an even surface; without difficulties; flowing easily
Example
The road was smooth and comfortable to drive on.
C2 noun (plural, informal) /skædz/

scads

Meaning
A large number or quantity of something (informal).
Example
She has scads of friends in the city.
B2 adjective /ˈsɪr.i.əl/

Serial

Meaning
happening in a series; consecutive; arranged in order
Example
The serial killer was finally caught after years of investigation.
A2 noun /ˈstrɔːbəri/

Strawberry

Meaning
a small red heart-shaped fruit with tiny seeds on the surface and sweet taste
Example
I love eating fresh strawberries with cream during summer.
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.
B1 noun /ˈseɪ.ɪŋ/

Saying

Meaning
a well-known phrase that expresses something true about life; a proverb
Example
There's an old saying that practice makes perfect.
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 verb /stɜːr/

stir

Meaning
to mix or move something in a circular motion, especially in liquid
Example
She stirred the soup to make sure it didn't burn.
C2 adjective /ˌstaʊtˈhɑːrtɪd/

stouthearted

Meaning
Brave, determined, and courageous
Example
The stouthearted soldier never gave up.
B2 verb /sɑːb/

sob

Meaning
to cry noisily while taking short breaths
Example
She began to sob uncontrollably after hearing the news.
C2 noun /ˈsɛnʃəns/

sentience

Meaning
The capacity to feel, perceive, or experience subjectively.
Example
Many argue that animals possess sentience.
B2 verb /ʃrʌɡ/

shrug

Meaning
To raise and lower the shoulders to express uncertainty or indifference.
Example
He shrugged when asked about the missing file.
B2 adjective /ˈstæt.ɪk/

static

Meaning
Lacking in movement, action, or change; stationary.
Example
Static ideas hinder progress.