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.
C2 noun /ˈsiːkənt/

secant

Meaning
A straight line that intersects a curve at two or more points.
Example
In geometry, a secant cuts the circle at two distinct points.
C1 adjective /ˌsækrəˈlɪdʒəs/

sacrilegious

Meaning
Showing disrespect or irreverence toward something sacred.
Example
The painting was criticized as being sacrilegious.
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 noun /stɑːr fruːts/

Star Fruits

Meaning
yellow tropical fruits that form a star shape when sliced crosswise; tangy and crisp taste
Example
When you slice star fruits, they look like beautiful yellow stars on your plate.
C2 noun /skʌlˈdʌɡəri/

skulduggery

Meaning
underhanded or dishonest behavior
Example
The politician was accused of financial skulduggery.
C1 verb /sɪˈkluːd/

seclude

Meaning
To keep someone away from other people; to isolate.
Example
The monk chose to seclude himself in the mountains.
C2 noun /ˌsɪɡnɪfɪˈkeɪʃən/

signification

Meaning
the meaning or sense conveyed by a word, action, or symbol
Example
The signification of the gesture was misunderstood.
B2 verb /saɪ/

sigh

Meaning
to let out a long, deep breath as an expression of tiredness, relief, or sadness
Example
She sighed with relief when she heard the good news.
B1 noun səˈplaɪ

supply

Meaning
A stock or amount of something supplied or available for use.
Example
Supply chains ensure resource availability.
B2 verb, noun /stæb/

stab

Meaning
to pierce or wound with a pointed weapon or object
Example
He was stabbed in the back during the altercation.
B2 noun /ˈsɛnət/

senate

Meaning
a legislative or governing body, typically the upper chamber in a bicameral legislature
Example
The senate voted in favor of the new healthcare bill.
B1 noun sɪˈkjʊə.rɪ.ti

security

Meaning
The state of being free from danger, threat, or loss.
Example
Food security is essential for human survival.
C1 noun /ˈstjuːpər/

stupor

Meaning
a state of near-unconsciousness or insensibility
Example
He remained in a stupor after hearing the shocking news.
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 /ˈsleɪvəri/

slavery

Meaning
the system or state of being owned and forced to work for someone else
Example
Slavery was abolished in most countries in the 19th century.
C1 noun /ˈsɪməli/

simile

Meaning
A figure of speech involving the comparison of one thing with another using 'like' or 'as'.
Example
She used a simile to describe her eyes as bright as stars.
B2 adverb /ˈsoʊʃəli/

socially

Meaning
in a way that relates to society or social interaction
Example
He is very active socially and attends many events.
B2 noun /ˈstɑːrtər/

starter

Meaning
a person or thing that starts something; the first course of a meal
Example
The starter of the meal was a fresh salad.
B2 noun ˈʃɔːtkʌmɪŋz

shortcomings

Meaning
A fault or failure to meet a certain standard; deficiencies.
Example
Institutional shortcomings affect student behavior negatively.
B2 noun /ˌsɛkʃuˈæləti/

sexuality

Meaning
a person's capacity for sexual feelings and orientation
Example
She spoke openly about her sexuality and identity.
C2 adjective /ˈsæŋɡwɪˌnɛri/

sanguinary

Meaning
Involving or causing much bloodshed; bloodthirsty.
Example
The battle was one of the most sanguinary conflicts of the war.
C2 verb /ˌsuːpərˈæd/

superadd

Meaning
to add something to what has already been added
Example
The author chose to superadd a new chapter to the revised edition.
C1 adjective /ˈskræpi/

scrappy

Meaning
Determined and willing to fight or argue; also messy or disorganized.
Example
Despite being small, he was a scrappy fighter.
B2 noun /ˈsɪnˌdroʊm/

syndrome

Meaning
a group of symptoms that occur together and characterize a condition or disease
Example
Down syndrome affects a person's physical and mental development.
B1 verb /sɪŋk/

sink

Meaning
to go down below the surface; to descend
Example
The ship sinks in the deep ocean.
C2 noun /ˈsætər/

satyr

Meaning
a creature from Greek mythology depicted as a lustful being, often half-man and half-goat; by extension, a lecherous man
Example
In the museum mural, a satyr plays the panpipes while dancing in the woods.
B2 noun /ˈsmɑːrt.nəs/

Smartness

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

synonymous

Meaning
having the same or nearly the same meaning; closely associated with something
Example
For many people, her name is synonymous with generosity.
A1 verb /siː/

see

Meaning
to perceive with the eyes; to understand; to meet
Example
I can see the mountain from here.
A2 noun /skɪl/

skill

Meaning
the ability to do something well through training or experience
Example
Her skill in painting impressed everyone.
C1 adjective /ˈstɒdʒi/

stodgy

Meaning
Dull, uninspired, or old-fashioned; also heavy and hard to digest when referring to food.
Example
The lecture was so stodgy that many students struggled to stay awake.
B2 noun /spaɪs/

spice

Meaning
a substance used to add flavor to food
Example
She added a pinch of spice to the curry for extra flavor.
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 adjective /sɒmˈnɪfərəs/

somniferous

Meaning
Tending to induce sleep; soporific.
Example
The professor's somniferous lecture put half the class to sleep.
A2 noun /stoʊn/

stone

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

Supernatural

Meaning
relating to things that cannot be explained by natural or scientific laws; beyond the normal or physical world
Example
The old house was said to have supernatural powers.
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 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.
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?
C1 adjective səˈsaɪ.ə.təl

societal

Meaning
Relating to society or social relationships.
Example
Societal benefits of space tourism are under debate.
A1 adverb /ˈsʌm.taɪmz/

Sometimes

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

sordid

Meaning
involving immoral or dishonorable actions; dirty or unpleasant
Example
The newspaper exposed the politician's sordid past.
B1 noun/verb /skɔːr/

score

Meaning
a number of points achieved in a game or test; to gain points or achieve a goal
Example
He scored the winning goal in the final match.
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.
C1 verb /ˈskwɒndər/

squander

Meaning
to waste money, time, or opportunities in a careless way
Example
He squandered his inheritance on gambling.
B1 noun /ˈsteɪtəs/

status

Meaning
the social or professional position or condition of someone or something
Example
His social status improved after the promotion.
B2 adjective /ˈslɒp.i/

Sloppy

Meaning
careless; messy; done without care or attention to detail
Example
His sloppy handwriting was difficult to read.
B2 noun /ˈstɛriəˌtaɪp/

stereotype

Meaning
A widely held but oversimplified and fixed idea of a particular type of person or thing.
Example
It is a stereotype that all gamers are antisocial.
C1 adjective /ˈsɛm.ɪ.nəl/

seminal

Meaning
Strongly influencing later developments; highly original and influential.
Example
His seminal book changed the course of modern philosophy.
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.
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 səˈsteɪ.nə.bəl tekˈnɒl.ə.dʒi

sustainable technology

Meaning
Technology designed to meet present needs without compromising future generations' ability to meet their needs.
Example
Sustainable technology ensures a cleaner future.
B1 verb /ˈsʌfər/

suffer

Meaning
to experience pain, distress, or hardship
Example
She suffered from a severe headache all day.
B1 verb /səˈspɛkt/

suspect

Meaning
to believe that someone has done something wrong; to doubt or mistrust
Example
I suspect he is lying about his whereabouts.
B1 noun /ʃɒk/

shock

Meaning
a sudden upsetting or surprising event or experience
Example
The news of his sudden departure was a shock to everyone.
C1 noun /ˈstætʃuːt/

statute

Meaning
A written law passed by a legislative body.
Example
The new statute protects workers' rights.
C2 noun /səˈlɪsɪˌtuːd/

solicitude

Meaning
Care or concern for someone or something.
Example
His mother showed great solicitude for his safety.
C1 verb, adjective, noun /spruːs/

spruce

Meaning
to make neat or tidy in appearance; also refers to an evergreen tree
Example
He spruced up his room before the guests arrived.
C1 noun /sɪr/

seer

Meaning
A person who is supposed to be able to see what will happen in the future; a prophet.
Example
The seer predicted a great change in the kingdom.
C1 adjective /ˈsɜːrvaɪl/ or /ˈsɜːrvəl/

servile

Meaning
having or showing an excessive willingness to serve or please others
Example
His servile attitude annoyed his colleagues.
C2 adjective /ˈspaɪnəs/

spinous

Meaning
Having spines or thorn-like projections
Example
The spinous cactus was difficult to handle without gloves.
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/noun /ˈsʌkjələnt/

succulent

Meaning
Juicy or full of juice; also refers to a plant with thick, fleshy leaves adapted to storing water.
Example
The steak was so succulent that everyone enjoyed it.
B2 verb /spɪn/

spin

Meaning
To turn around quickly or cause something to rotate
Example
The dancer began to spin gracefully on the stage.
B2 noun /ˈʃɔːr.tɪdʒ/

Shortage

Meaning
a lack or deficiency of something that is needed or expected
Example
There is a severe water shortage in the region.
C1 noun /səˈnɑːtə/

sonata

Meaning
A musical composition for one or more instruments, typically in several movements.
Example
She performed a beautiful Beethoven sonata on the piano.
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 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.
B2 noun /ˈstiː.mər/

Steamer

Meaning
a ship or boat powered by steam engines
Example
The old steamer crossed the river slowly.
C2 adjective /ˌseɪpiˈɛnʃəl/

sapiential

Meaning
Relating to wisdom or knowledge, often in a religious or philosophical sense.
Example
The monk shared sapiential teachings with his students.
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.
B2 noun /ˈsɜːvɪŋ/

serving

Meaning
a portion of food for one person; the act of giving food or drink to someone
Example
He ate a large serving of rice and curry.
C2 adjective /sɪˈdɪʃəs/

seditious

Meaning
Encouraging rebellion against authority.
Example
The activist spread seditious pamphlets among the crowd.
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.
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.
B1 adjective ˈsen.sɪ.tɪv

sensitive

Meaning
Quick to detect or respond to slight changes, signals, or influences.
Example
Sensitive systems require precise handling.
B2 adjective /self səˈfɪʃənt/

Self-sufficient

Meaning
able to provide for oneself without depending on others
Example
The farm is completely self-sufficient in producing vegetables.
C2 noun /ˈsoʊbrɪˌkeɪ/

sobriquet

Meaning
a person's nickname or descriptive name
Example
The famous leader was known by the sobriquet 'The Iron Lady'.
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.
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.
B2 adjective /səˈbɜːrbən/

suburban

Meaning
relating to or characteristic of a suburb or the people living there
Example
They bought a house in a quiet suburban area.
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 adjective /ˌsɛm.iˈæn.ju.əl/

semiannual

Meaning
Occurring twice a year; every six months.
Example
The company holds a semiannual meeting with all employees.
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 /ˌsɛrənˈdɪpɪtəs/

serendipitous

Meaning
Occurring or discovered by chance in a happy or beneficial way.
Example
Their meeting at the café was purely serendipitous.
C2 noun /sɪlf/

sylph

Meaning
A mythical spirit of the air; also refers to a slender, graceful woman.
Example
She moved across the stage like a sylph, light and graceful.
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 verb /smel/

smell

Meaning
to perceive odor through the nose; to have an odor
Example
The flowers smell sweet.
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 noun /ˈsɪmətri/

symmetry

Meaning
the quality of having balanced proportions or identical parts facing each other
Example
The building’s symmetry impressed the visitors.
A2 noun /spiːtʃ/

Speech

Meaning
formal address or discourse delivered to an audience; the expression of thoughts in spoken words
Example
The president gave an inspiring speech to the nation.
C1 verb /ˈstriːm.laɪn/

streamline

Meaning
To make a process simpler and more efficient.
Example
The company aims to streamline production to reduce costs.
C1 adjective /ˈswɛltərɪŋ/

sweltering

Meaning
uncomfortably hot
Example
The sweltering heat made it hard to work.
C2 adjective /ˈsɛpərəbəl/

separable

Meaning
Capable of being separated or divided.
Example
The two issues are separable and should be discussed independently.
A1 modal verb /ʃʊd/

should

Meaning
used to indicate obligation or duty
Example
You should study for your exams.
B1 verb /səˈraʊnd/

surround

Meaning
To be all around someone or something.
Example
Mountains surround the small village.
B1 noun ˈstrʌk.tʃər

structure

Meaning
The arrangement of and relations between the parts or elements of something complex.
Example
The structure is designed for safety and functionality.
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 adjective /ˈsuːtəbl/

suitable

Meaning
appropriate or right for a particular person, purpose, or situation
Example
This dress is suitable for the wedding.
C1 noun /stɪnt/

stint

Meaning
a period of time spent doing a particular job or activity
Example
She did a short stint as a teacher before moving abroad.
B2 noun /səˈvaɪvl/

survival

Meaning
the state of continuing to live or exist, typically in difficult conditions
Example
Survival in the wild can be a challenging experience.
A2 adverb /ˈʃʊə.li/

Surely

Meaning
without doubt; certainly
Example
You will surely pass the exam if you study hard.
C1 verb /ˈsɪmjʊˌleɪt/

simulate

Meaning
to imitate the appearance, character, or behavior of something; to pretend or reproduce conditions artificially
Example
The pilot had to simulate an emergency landing during training.
B1 adjective /ˌstreɪt ˈfɔːr.wərd/

Straight forward

Meaning
honest and open; not complicated; easy to understand
Example
His explanation was very straightforward and easy to follow.
A2 verb /saɪn/

sign

Meaning
to write your name on something to show agreement or approval; to make a gesture with meaning
Example
Please sign the contract at the bottom of the page.
B2 adjective səˈsteɪ.nə.bəl

sustainable

Meaning
Able to be maintained at a certain rate or level; conserving an ecological balance.
Example
Sustainable practices mitigate environmental impact.
C1 noun ˌsʌb.sɪ.dɪˈzeɪ.ʃən

subsidization

Meaning
Financial assistance provided by government to make certain goods or services more affordable.
Example
Subsidization of agriculture helps farmers maintain crop production.
C2 verb /ˈsɪn.tɪ.leɪt/

scintillate

Meaning
to sparkle or shine brightly; to emit flashes of light
Example
The diamond ring scintillated under the bright lights.
B1 noun /ˈsɜːdʒəri/

surgery

Meaning
a medical procedure involving the cutting of the body to treat a condition
Example
She underwent surgery to remove the tumor.
B1 noun /səˈpɔːtər/

supporter

Meaning
a person who supports someone or something
Example
She is a strong supporter of the local animal shelter.
A1 noun/adjective /saʊθ/

south

Meaning
the direction towards the bottom of a map, opposite to north
Example
The sun rises in the east and sets in the south.
B1 adverb /sɪnˈsɪrli/

sincerely

Meaning
with genuine feelings; honestly and truly
Example
I sincerely hope you recover soon.
B2 noun /ˈsɪr.i.əs.nəs/

Seriousness

Meaning
the quality of being serious; gravity; importance
Example
The seriousness of the situation became clear when the doctor spoke.
B2 verb /ˈsʌfəkeɪt/

suffocate

Meaning
to cause someone to die or have difficulty breathing by depriving them of air
Example
The child nearly suffocated when trapped in the locked room.
B2 verb /ˈstrɛŋkθən/

strengthen

Meaning
To make or become stronger.
Example
Communication can strengthen bonds between people.
B2 noun /slɛdʒ/

sledge

Meaning
a vehicle for traveling over snow, often pulled by animals
Example
The children rode a sledge down the snowy hill.
B1 noun /ˈʃoʊldər/

Shoulder

Meaning
the part of the body between the neck and the arm
Example
He carried the bag over his shoulder.
C1 verb/noun /skɒtʃ/

scotch

Meaning
to put an end to something; also a type of whisky
Example
The report scotched the rumors of a merger.