stealth
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C1 noun /stɛlθ/

stealth

Meaning
The act of moving, doing, or achieving something quietly and secretly.
Example
The cat moved with stealth towards its prey.
C1 verb /ˈʃɪmər/

shimmer

Meaning
To shine with a soft, wavering light.
Example
The lake shimmered under the moonlight.
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 noun /sɛkt/

sect

Meaning
a subgroup of a larger religious or political group, often with differing beliefs
Example
The group split into different sects due to doctrinal differences.
C1 noun /ˌsɛrənˈdɪpɪti/

serendipity

Meaning
The occurrence of events by chance in a happy or beneficial way.
Example
Finding that old photo album was pure serendipity.
C1 noun /ˌsæbəˈtɜːr/

saboteur

Meaning
A person who engages in sabotage.
Example
The saboteur was arrested before he could plant the bomb.
C1 adjective /ˌsɛlf ˈraɪtʃəs/

self-righteous

Meaning
Having or showing an attitude of moral superiority; believing one’s own beliefs are the only right ones.
Example
His self-righteous comments made everyone uncomfortable.
C1 adjective sɪˈmæn.tɪk

semantic

Meaning
Related to meaning in language; concerning the interpretation of words and sentences.
Example
AI models use semantic analysis to understand context.
C1 noun /ˈspɛkjʊˌleɪtər/

speculator

Meaning
A person who forms theories without evidence, or invests in assets hoping for profit.
Example
The real estate speculator bought land hoping its value would rise.
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 /səˈriːn/

serene

Meaning
Calm, peaceful, and untroubled; tranquil.
Example
The lake had a serene and peaceful atmosphere.
C1 adjective /ˈskrɔːni/

scrawny

Meaning
very thin and bony, often looking unhealthy
Example
The scrawny boy could barely lift the heavy bag.
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.
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 adjective /ˈsʌmp.tʃu.əs/

sumptuous

Meaning
Splendid and expensive-looking; luxurious.
Example
The guests were treated to a sumptuous banquet.
C1 adjective /ˈsæv.i/

savvy

Meaning
Having practical knowledge and the ability to make good judgments.
Example
She is a tech-savvy entrepreneur.
C1 adjective /ˈskrɪptʃərəl/

scriptural

Meaning
Relating to or contained in the scriptures or holy writings.
Example
The priest gave a scriptural reference during the sermon.
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 adjective /ˈsɜːrvɪsəbl/

serviceable

Meaning
fit for use; usable; in working order
Example
The old bicycle is still serviceable despite its age.
C1 adjective /sɔɪld/

soiled

Meaning
dirty or stained; not clean
Example
His clothes were soiled after playing in the mud.
C1 adjective /ˈseɪlaɪn/

Saline

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

shirk

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

stigma

Meaning
a mark of shame or disgrace associated with a particular circumstance or quality
Example
There is still a stigma around mental health issues in many societies.
C1 noun /ˈsæf.rən/

Saffron

Meaning
a deep yellow-orange color; an expensive spice derived from crocus flowers
Example
The saffron fabric looked beautiful in the sunlight.
C1 verb ˈsɪn.θə.saɪ.zɪŋ

synthesizing

Meaning
Combine (a number of things) into a coherent whole.
Example
He excels in synthesizing ideas from different sources.
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.
C1 adjective /ˌsuːɪˈsaɪdəl/

Suicidal

Meaning
relating to or having thoughts of killing oneself; extremely dangerous or harmful
Example
The reckless driving was suicidal behavior.
C1 noun /səˈrɛn.ɪ.ti/

serenity

Meaning
The state of being calm, peaceful, and untroubled.
Example
Meditation helps in achieving inner serenity.
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.
C1 adjective /ˈstɪltɪd/

stilted

Meaning
Speech or writing that is stiff, unnatural, or overly formal.
Example
His speech sounded stilted and rehearsed.
C1 noun /ˈswiːt.miːt/

Sweetmeat

Meaning
a small piece of confectionery or candy; a sweet delicacy
Example
The children enjoyed the traditional sweetmeats during the festival.
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 verb /ˈskwɒndər/

squander

Meaning
to waste money, time, or opportunities in a careless way
Example
He squandered his inheritance on gambling.
C1 verb /ˈsaɪdˌtræk/

sidetrack

Meaning
To distract from the main subject or activity.
Example
She was sidetracked by an unexpected phone call.
C1 verb /sleɪ/

slay

Meaning
to kill violently; informally, to impress greatly
Example
The hero vowed to slay the dragon.
C1 adjective /sɪˈmɛtrɪkəl/

symmetrical

Meaning
having parts on either side that match or are the same in shape, size, or arrangement
Example
The artist designed a symmetrical pattern on the floor.
C1 verb /səbˈsɪst/

subsist

Meaning
To maintain or support oneself, especially at a minimal level.
Example
Many villagers still subsist on fishing and farming.
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.
C1 noun /slæɡ/

slag

Meaning
Stony waste matter separated from metals during the smelting process.
Example
The factory dumped the slag near the river.
C1 adjective /ˈsɒljʊbəl/

soluble

Meaning
able to be dissolved, especially in water
Example
Sugar is soluble in water.
C1 /ʃrɛd/

shred

Meaning
to tear or cut something into small pieces
Example
She shredded the old documents before throwing them away.
C1 noun, verb /ˈskʌf.əl/

scuffle

Meaning
a short, confused fight or struggle; to engage in such a fight
Example
Two players scuffled on the field after the foul.
C1 noun ˌsɛlf.rɪˈstreɪnt

self-restraint

Meaning
The practice of restraining oneself from indulging in something, typically an impulse or desire.
Example
Practicing self-restraint helps in avoiding impulsive decisions.
C1 verb /sluː/

slew

Meaning
To turn or slide violently in a particular direction.
Example
The car slewed across the icy road.
C1 adjective /ʃrɪl/

shrill

Meaning
High-pitched and piercing in sound.
Example
The shrill whistle startled everyone in the room.
C1 noun /ˌsəʊ.ʃi.əʊˈek.ə.nɒm.ɪk ˈprɒɡ.res/

socioeconomic progress

Meaning
Advancement in both social and economic conditions of a society or community.
Example
Socioeconomic progress uplifts marginalized communities.
C1 noun /ˈseɪɑːns/

seance

Meaning
A meeting where people attempt to communicate with the spirits of the dead.
Example
They held a seance to contact their late grandmother.
C1 verb /slaʊtʃ/

slouch

Meaning
To stand, sit, or move in a lazy or awkward way.
Example
He slouched in the chair, looking tired.
C1 noun /ˌsɛnsɪtaɪˈzeɪʃən/

sensitization

Meaning
The process of becoming sensitive to a substance, situation, or influence.
Example
The doctor warned about the sensitization caused by repeated exposure to chemicals.
C1 noun /ˈsɜːr.vɪ.tuːd/

Servitude

Meaning
the state of being a slave or completely subject to someone more powerful
Example
Many people fought to escape the servitude imposed by the colonial system.
C1 adjective /ˈsɪlkən/

Silken

Meaning
made of silk; smooth and soft like silk
Example
She wore a beautiful silken dress to the party.
C1 noun /ˈʃʊɡ.ər ˈkæn.di/

Sugar candy

Meaning
crystallized sugar formed into small pieces; rock candy made from sugar syrup
Example
The children enjoyed eating colorful sugar candy at the festival.
C1 adjective /ˈskrʌfi/

Scruffy

Meaning
untidy or unkempt in appearance; shabby and worn
Example
The scruffy old dog wandered through the streets looking for food.
C1 adjective /ˈspɛktrəl/

spectral

Meaning
Relating to a ghost or specter; ghostly. Also relating to a spectrum.
Example
The old mansion had a spectral atmosphere at night.
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.
C1 noun /skwɔːl/

squall

Meaning
a sudden violent gust of wind, often accompanied by rain, snow, or sleet
Example
A sudden squall caught the sailors off guard.
C1 noun /səˈvænə/

savanna

Meaning
a grassy plain with scattered trees, typical of tropical and subtropical regions
Example
Giraffes browsed on acacia trees across the wide savanna.
C1 noun /ˈsɛmbləns/

Semblance

Meaning
the outward appearance or apparent form of something, especially when the reality is different
Example
There was only a semblance of order in the chaotic office.
C1 adjective /ˈstætʃətɔːri/

statutory

Meaning
Required, permitted, or enacted by law.
Example
The company must comply with all statutory regulations.
C1 noun /ˈstəʊ.ɪ.sɪ.zəm/

stoicism

Meaning
The endurance of pain or hardship without the display of feelings and without complaint.
Example
His stoicism during hardship was admirable.
C1 noun speɪst ˌrep.ɪˈtɪʃ.ən

spaced repetition

Meaning
A learning technique that involves reviewing information at increasing intervals to improve long-term retention.
Example
Spaced repetition helps in long-term memory retention.
C1 noun /ˈsɪstərhʊd/

sisterhood

Meaning
The relationship between sisters, or a community of women united by shared experiences or goals.
Example
The feminist movement created a strong sense of sisterhood among women.
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 noun /ˈsɔːjər/

Sawyer

Meaning
a person who saws wood, especially as an occupation
Example
The skilled sawyer cut the logs into planks.
C1 adverb /ˈsɜːrtʃɪŋli/

searchingly

Meaning
In a way that seems to look for hidden meanings or truth.
Example
She looked at him searchingly, hoping for an honest answer.
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.
C1 noun /ˈsɛdətɪv/

sedative

Meaning
A substance that calms the nerves or induces sleep.
Example
The doctor prescribed a sedative to help the patient sleep.
C1 adjective /ˈsiː.di/

Seedy

Meaning
squalid and disreputable; shabby and run-down; full of seeds
Example
They avoided walking through the seedy part of town at night.
C1 adjective ˈsɒvrɪn

sovereign

Meaning
Possessing supreme or ultimate power; independent.
Example
The sovereign government has control over its currency.
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 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 noun /stæɡˈneɪ.ʃən/

stagnation

Meaning
A state of inactivity or lack of growth, especially in an economy.
Example
High unemployment led to economic stagnation.
C1 verb /ˈsɪnɚdʒaɪzd/

synergized

Meaning
Combine in such a way that the total effect is greater than the sum of the individual effects.
Example
The teams were synergized to maximize productivity.
C1 adjective /səˈtɪrɪkəl/

satirical

Meaning
containing or using satire to criticize or mock
Example
The satirical cartoon mocked the government's new policy.
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.
C1 noun /ˈskɛptɪk/

skeptic

Meaning
A person who doubts or questions accepted beliefs or claims.
Example
The scientist was a skeptic of theories without solid evidence.
C1 adjective /ˈskeɪ.li/

Scaly

Meaning
covered with scales; having a rough surface like scales
Example
The fish has scaly skin.
C1 verb /ˈspɪərˌhɛd/

spearhead

Meaning
to lead or initiate an action, project, or movement
Example
She spearheaded the campaign for environmental awareness.
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.
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 /sɪˈnɒpsɪs/

synopsis

Meaning
a brief summary of the main points of a text, film, or research
Example
The publisher asked the author to submit a one-page synopsis of the novel.
C1 verb /ˈstɪɡmətaɪz/

stigmatize

Meaning
to describe or regard someone as worthy of disgrace or disapproval
Example
People with certain illnesses are often unfairly stigmatized.
C1 adjective /səbˈdʒɛktɪv/

subjective

Meaning
based on personal feelings, tastes, or opinions rather than facts
Example
Beauty is often considered a subjective concept.
C1 verb /struː/

strew

Meaning
to scatter or spread things untidily over a surface or area
Example
Clothes were strewn across the floor.
C1 noun /ˈsɜːrəɡət/

surrogate

Meaning
A substitute, especially a person deputizing for another in a specific role or office.
Example
The surrogate mother gave birth to the child after carrying it for nine months.
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 adjective /ˈstraɪ.dənt/

strident

Meaning
loud and harsh; presenting a point of view in a forceful way
Example
His strident voice made the debate uncomfortable.
C1 noun /ˌsʌpəˈzɪʃən/

supposition

Meaning
An assumption or belief that something is true without certain proof.
Example
His plan was based on the supposition that the market would recover quickly.
C1 adjective /ˈsɛreɪtɪd/

serrated

Meaning
Having a notched or saw-toothed edge.
Example
The bread knife had a serrated blade.
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.
C1 adverb spɒnˈteɪnɪəsli

spontaneously

Meaning
In a spontaneous way; naturally and without planning or external cause.
Example
Children learn spontaneously through peer interactions.
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.
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 noun ˌskeɪ.ləˈbɪl.ə.ti

scalability

Meaning
The capacity to be changed in size or scale; the ability of a system to handle a growing amount of work.
Example
The new software offers high scalability for large enterprises.
C1 noun /ˈsækrɪlɪdʒ/

sacrilege

Meaning
Violation or misuse of what is regarded as sacred.
Example
Stealing from the temple was considered an act of sacrilege.
C1 adjective /ˈʃɪp.ʃeɪp/

Shipshape

Meaning
neat and tidy; in good order; well-organized
Example
Everything was shipshape before the inspection.
C1 adjective /suːˈpɜːr.flu.əs/

superfluous

Meaning
Unnecessary, especially through being more than enough.
Example
His speech contained too many superfluous details.
C1 noun /ˈʃæmbəlz/

shambles

Meaning
a state of complete disorder or ruin
Example
After the storm, the whole town was in shambles.
C1 verb /sɪˈsiːd/

secede

Meaning
To formally withdraw from a political or organizational union.
Example
Several states threatened to secede from the union.
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.
C1 adjective /ˈstɛr.aɪl/

sterile

Meaning
Free from bacteria or other living microorganisms; incapable of producing offspring.
Example
The surgeon worked in a sterile environment to avoid infection.
C1 adjective /ˈspaɪni/

spiny

Meaning
covered with or full of spines; having sharp points
Example
The spiny cactus stood tall in the desert.
C1 verb /siːð/

seethe

Meaning
To be filled with intense but unexpressed anger or agitation.
Example
She was seething with anger after the unfair decision.
C1 verb /swɜːrv/

swerve

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

slab

Meaning
a large, thick, flat piece of stone, concrete, or other hard material
Example
The workers laid a concrete slab for the foundation.
C1 adjective /ˈspeɪʃəl/

spatial

Meaning
relating to space or the position, area, and size of things
Example
The scientist studied the spatial arrangement of stars.
C1 noun stɔːrm ɪnˌtensɪfɪˈkeɪʃən

storm intensification

Meaning
The process by which storms become stronger and more severe in intensity.
Example
Storm intensification is linked to climate change.
C1 adjective /ˈʃɑːdi/

shoddy

Meaning
badly made or done; of poor quality
Example
The contractor did a shoddy job on the repairs.
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 verb sɪˈkwɛstər

sequester

Meaning
To isolate or hide away.
Example
The carbon captured by trees can be sequestered for years.
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 adjective /ˈsliːzi/

sleazy

Meaning
morally low, dirty, or cheap in quality
Example
He avoided the sleazy nightclub downtown.
C1 adjective /ˈstɪndʒi/

stingy

Meaning
unwilling to spend or give; miserly
Example
He is too stingy to buy a gift for his friend.
C1 adjective /ˈskrʌmpʃəs/

scrumptious

Meaning
extremely tasty or delicious
Example
She baked a scrumptious chocolate cake for the party.
C1 verb /ˈstriːmlaɪnɪŋ/

streamlining

Meaning
The process of making an organization or system more efficient by simplifying or eliminating unnecessary steps
Example
Streamlining processes can significantly reduce operational costs.
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.
C1 noun /ˈstɪmjʊlənt/

stimulant

Meaning
A substance that raises levels of physiological or nervous activity in the body.
Example
Coffee is a common stimulant that helps people stay awake.
C1 noun /ˈsiːskeɪp/

seascape

Meaning
A view or painting of the sea.
Example
The artist painted a beautiful seascape at sunset.
C1 verb /ˈskruː.tɪ.naɪz/

scrutinize

Meaning
Examine or inspect closely and thoroughly.
Example
The scientist scrutinized the data before publishing his findings.
C1 adjective /ˈskwiːmɪʃ/

squeamish

Meaning
easily made to feel sick, faint, or disgusted
Example
She felt squeamish at the sight of blood.
C1 noun /ˈsɔː.dʌst/

sawdust

Meaning
The tiny particles of wood produced by sawing or sanding.
Example
The floor was covered with sawdust from the carpentry work.