solar energy
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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.
B1 noun /ˌsaʊθˈwɛst/

southwest

Meaning
the direction that is between south and west; a region in that direction
Example
They traveled to the southwest of the country for their vacation.
B2 noun /skɛtʃ/

sketch

Meaning
a simple, rough drawing or outline
Example
He made a quick sketch of the landscape.
C2 verb /sʌbˈtɛnd/

subtend

Meaning
To extend across or form an angle at a particular point, often used in geometry.
Example
The arc subtends a 60-degree angle at the center of the circle.
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 ˌsæn.ɪ.taɪˈzeɪ.ʃən

sanitization

Meaning
The process of cleaning and disinfecting to eliminate germs and bacteria.
Example
Regular sanitization keeps appliances germ-free.
B2 verb ˈstɪmjəleɪt

stimulate

Meaning
To encourage or promote the development or growth of something
Example
Proper sunlight stimulates plant growth.
A1 pronoun /ʃi/

she

Meaning
a female person or animal previously mentioned or easily identified
Example
She is going to the market to buy vegetables.
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 /səˈlɪn.ə.t̬i/

salinity

Meaning
The salt content of soil or water, typically measured as a concentration.
Example
The salinity of the ocean varies depending on depth and location.
A2 noun /spɔːt/

sport

Meaning
an activity involving physical exertion and skill in which an individual or team competes against another or others for entertainment
Example
Football is a popular sport around the world.
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.
A2 adverb /ˈsʌm.haʊ/

Somehow

Meaning
in some way; for some reason that is not clear
Example
Somehow, I managed to finish the project on time.
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 adjective /ˈskɛtʃi/

sketchy

Meaning
not thorough or detailed; suspicious or unsafe
Example
The details of the project were still sketchy.
C1 verb /ˈʃækəl/

shackle

Meaning
to chain or restrain; to restrict someone’s actions or freedom
Example
Outdated regulations shackle small businesses and slow innovation.
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 verb /səbˈmɜːrdʒ/

submerge

Meaning
to put under water or cover with liquid
Example
The floodwaters threatened to submerge the village.
B1 adjective /skɪld/

Skilled

Meaning
having or showing the knowledge, ability, or training to perform certain activities or work well
Example
He is a skilled carpenter who can build beautiful furniture.
C1 adjective /ˈspʌndʒi/

Spongy

Meaning
soft and full of holes like a sponge; porous
Example
The cake had a light and spongy texture.
B1 noun /ˈseɪ.lər/

Sailor

Meaning
a person who works on a ship or boat; a member of a navy
Example
The experienced sailor navigated the ship through the storm.
A1 adjective /ˈsɪmpəl/

Simple

Meaning
easy to understand or do; not complicated
Example
This is a simple recipe that anyone can follow.
C2 noun /sɪˈnɛrəsɪs/

syneresis

Meaning
The contraction of two adjacent vowels into a single syllable or the separation of liquid from a gel.
Example
The yogurt showed syneresis when liquid separated on top.
A2 adjective /ˈsep.ər.ət/

Separate

Meaning
distinct; not connected; individual; apart
Example
Please keep your personal and professional lives separate.
B2 verb /stʌn/

stun

Meaning
to shock or surprise someone greatly; to knock someone unconscious or dazed
Example
The news of her sudden resignation stunned everyone.
C1 noun /strəˈtiː.dʒɪk ˈɪn.saɪts/

strategic insights

Meaning
Deep understanding and wisdom gained through careful analysis for planning purposes.
Example
Strategic insights guide policymaking.
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 /swiːt.laɪm/

Sweetlime

Meaning
a citrus fruit that is sweeter and less acidic than regular lime
Example
The sweetlime juice was refreshing on a hot day.
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.
A2 noun /skɜːrt/

Skirt

Meaning
a garment that hangs from the waist and covers part or all of the legs
Example
She chose a blue skirt to match her blouse.
C1 adjective /sɔɪld/

soiled

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

Surpassing

Meaning
exceeding; going beyond; outstanding
Example
Her surpassing beauty made everyone stop and stare.
C1 verb /sɪˈkluːd/

seclude

Meaning
To keep someone away from other people; to isolate.
Example
The monk chose to seclude himself in the mountains.
C1 noun ˈsɛlfləsnɪs

selflessness

Meaning
The quality of being concerned more with the needs of others than with one's own.
Example
Selflessness is a key value for community building.
C2 noun /ˈslʌɡərd/

sluggard

Meaning
A lazy, sluggish person.
Example
The sluggard refused to get out of bed even at noon.
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.
B1 adverb /səˈpraɪzɪŋli/

surprisingly

Meaning
in a way that causes surprise or amazement
Example
Surprisingly, she finished the entire project in just one day.
B2 noun /ˈsɪɡ.nə.tʃər/

Signature

Meaning
a person's name written in their own handwriting as identification or authorization
Example
Please put your signature at the bottom of the document.
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.
A1 noun /ˈsæləd/

salad

Meaning
a dish consisting of various ingredients, typically including vegetables, which are usually mixed with a dressing
Example
She made a fresh salad with lettuce, tomatoes, and cucumbers.
B2 noun /ˈspætʃ.ʊ.lə/

Spatula

Meaning
a kitchen utensil with a flat, flexible blade used for mixing, spreading, or lifting food
Example
I used a spatula to flip the pancakes in the pan.
B2 verb /ˈskræmbəl/

scramble

Meaning
to move or climb quickly using hands and feet; to mix or arrange in a hurried way
Example
The kids scrambled up the hill to catch the kite.
B2 adjective /suːˈpriːm/

Supreme

Meaning
highest in rank, authority, or quality; greatest; most important
Example
The Supreme Court made the final decision.
C2 noun /ˈsɪbɪləns/

sibilance

Meaning
A hissing or hushing sound, especially in speech with 's' or 'sh'.
Example
The poet used sibilance to create a soft, hissing effect in the verse.
A2 adverb /ˈsʌm.weər/

Somewhere

Meaning
in or at some place; in an unspecified location
Example
I left my keys somewhere in the house.
C2 noun /ˌsɒ̃ˈfrwɑː/

sang-froid

Meaning
Composure or coolness, especially in difficult situations.
Example
The leader handled the crisis with remarkable sang-froid.
B2 noun /ˈskʌlp.tər/

Sculptor

Meaning
an artist who creates sculptures by carving, modeling, or shaping materials
Example
The sculptor spent months creating a beautiful marble statue.
C1 adjective /ˈskɔːrnfəl/

Scornful

Meaning
showing contempt or disdain; expressing scorn
Example
She gave him a scornful look when he made the rude comment.
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.
C1 adjective /ˈsek.j ə.l ər/

Secular

Meaning
not connected with religious or spiritual matters; worldly
Example
The country maintains a secular government that separates religion from politics.
B1 verb /stretʃ/

stretch

Meaning
to extend or expand; to make or become longer or wider
Example
Athletes stretch their muscles before exercising.
A2 verb /skiː/

ski

Meaning
to glide over snow on skis
Example
We went skiing in the Alps last winter.
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.
C1 verb /ˈskʌr.i/

scurry

Meaning
To move quickly with short, hurried steps.
Example
The mice scurried across the kitchen floor when the lights turned on.
C1 adjective /ʃrɪl/

shrill

Meaning
High-pitched and piercing in sound.
Example
The shrill whistle startled everyone in the room.
C2 adjective /ˌsɒfəˈmɒrɪk/

sophomoric

Meaning
showing immaturity and overconfidence, like a sophomore
Example
His sophomoric behavior embarrassed his friends.
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 /sɪˈtɑːr/

Sitar

Meaning
a traditional Indian stringed musical instrument with a long neck and resonating body
Example
The sitar creates beautiful ragas in Indian classical music.
C1 verb sɪˈkwɛstər

sequester

Meaning
To isolate or hide away.
Example
The carbon captured by trees can be sequestered for years.
A1 noun /sɔːŋ/

song

Meaning
a short piece of music with words that are sung
Example
She sang a beautiful song at the concert.
C1 noun /stɑːr ˈæn.ɪs/

Star Anise

Meaning
star-shaped spice pod with a licorice-like flavor used in cooking
Example
She added star anise to the soup for aromatic flavor.
C2 adjective /ˈʃɑːpwɔːrn/

shopworn

Meaning
worn or faded from being displayed in a shop; no longer fresh or original
Example
The shopworn shoes were sold at a discount.
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.
B2 verb /ˈsprɪŋkəl/

sprinkle

Meaning
to scatter small drops or particles of a substance over a surface
Example
She sprinkled sugar on top of the cake.
C2 adjective /saɪˈdɪəriəl/

sidereal

Meaning
Relating to the stars or constellations; measured relative to the stars.
Example
Astronomers use sidereal time to track the positions of stars.
B2 noun /ˈsɪmpəθi/

Sympathy

Meaning
feelings of pity and sorrow for someone else's misfortune
Example
She expressed her sympathy for the victims of the accident.
C1 verb /smɜrk/

smirk

Meaning
to smile in a self-satisfied, smug, or silly way
Example
He smirked when he won the argument.
B2 noun /ˈspəʊkspɜːrsən/

spokesperson

Meaning
a person who speaks on behalf of others or an organization
Example
The spokesperson addressed the press conference on behalf of the company.
C1 adjective /ʃruːd/

Shrewd

Meaning
having or showing sharp powers of judgment; astute
Example
The shrewd businessman made a profitable deal in the competitive market.
B1 adjective /ˈspaɪ.si/

Spicy

Meaning
having a strong, hot flavor from spices; containing spices
Example
This curry is too spicy for me to eat.
C2 noun /ˈsɪlədʒɪzəm/

syllogism

Meaning
A form of reasoning in which a conclusion is drawn from two given or assumed premises.
Example
The philosopher explained the concept of syllogism using simple examples.
C1 adjective /ˈskrʌmpʃəs/

scrumptious

Meaning
extremely tasty or delicious
Example
She baked a scrumptious chocolate cake for the party.
C2 noun /ˈsʊrmə fɪʃ/

Surma fish

Meaning
a freshwater fish species found in the Surma river system of Bangladesh and northeastern India
Example
Surma fish is native to the rivers of Sylhet region.
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 noun /ˈsɜːrmən/

sermon

Meaning
A religious discourse delivered by a preacher, often offering moral instruction or spiritual guidance.
Example
The pastor gave a moving sermon about compassion and forgiveness.
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.
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.
A2 verb /səˈpəʊz/

suppose

Meaning
to assume or believe something is true without proof
Example
I suppose she will be here soon.
C2 noun /sɪnˈtɪl.ə/

scintilla

Meaning
A tiny trace or spark of a specified quality or feeling.
Example
There wasn’t a scintilla of doubt in her mind.
C2 adjective /ˈstɜːr.tər.əs/

stertorous

Meaning
Characterized by heavy snoring or breathing.
Example
The patient’s stertorous breathing alarmed the nurses.
B1 verb /ˈsætɪsfaɪ/

satisfy

Meaning
to fulfill the desires, expectations, or needs of someone; to make content
Example
The delicious meal satisfied our hunger completely.
C2 adjective /ˌsʌpəzɪˈtɪʃəs/

supposititious

Meaning
Based on assumption rather than fact; not genuine or authentic.
Example
The story turned out to be supposititious, with no evidence to support it.
B2 adjective /ˌsuː.pəˈfɪʃ.əl/

superficial

Meaning
Existing or occurring at or on the surface; not thorough or deep.
Example
His understanding of the subject was rather superficial.
B2 noun ˌsensɪˈtɪvɪti

sensitivity

Meaning
The quality or condition of being sensitive; responsiveness to stimuli.
Example
Bose proved plant sensitivity through experiments.
C1 noun /ˈskrɪmɪdʒ/

scrimmage

Meaning
A practice game or informal match, often in sports, especially football.
Example
The team had a scrimmage before the official season started.
C2 noun /ˈsaɪnɪkjʊər/

sinecure

Meaning
a position requiring little or no work but giving financial benefit or status
Example
He was given a sinecure at the university as a reward for his loyalty.
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.
A1 noun /ˈsætərdeɪ/

saturday

Meaning
The day of the week between Friday and Sunday; traditionally the sixth day of the week
Example
We are going to the beach on Saturday.
B2 adjective /ˈstaɪ.lɪʃ/

Stylish

Meaning
fashionable and attractive; having elegance or taste in appearance
Example
She wore a stylish dress to the party.
B2 adjective /ˈsʌb.sɪ.kwənt/

subsequent

Meaning
Coming after something in time; following in time or order.
Example
Subsequent events clarified the outcomes.
C1 adjective /smʌɡ/

smug

Meaning
having or showing an excessive pride in oneself or one's achievements
Example
He wore a smug smile after winning the debate.
B2 noun /skwɒd/

squad

Meaning
a small group of people organized for a specific purpose or task, often in the military or sports
Example
The football squad trained hard before the championship match.
C1 noun/verb /ˈslʌmbər/

slumber

Meaning
A state of sleep; to sleep lightly or rest.
Example
The child slumbered peacefully through the night.
C1 adjective /ˈsʌlən/

sullen

Meaning
bad-tempered and gloomy; silently resentful
Example
She gave him a sullen look and walked away.
C1 verb /ˈstɪp.jʊ.leɪt/

stipulate

Meaning
to demand or specify a condition in an agreement or contract
Example
The contract stipulates that payment must be made within 30 days.
A2 adjective /ˈsəʊʃəl/

social

Meaning
relating to society or its organization
Example
She has a very social personality and enjoys meeting new people.
A1 verb /spend/

spend

Meaning
to use money to buy something; to pass time
Example
I spend too much money on books.
B2 noun /spaɪt/

spite

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

studied

Meaning
carefully considered, deliberate, or planned
Example
Her response was calm and studied, not impulsive.
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.
B2 adjective /ˈʃeɪ.di/

Shady

Meaning
providing shade; dishonest; suspicious
Example
The shady businessman made a suspicious deal.
C1 adjective /səkˈsɪŋkt/

succinct

Meaning
Briefly and clearly expressed; characterized by clear, precise expression in few words.
Example
His speech was succinct and impactful.
C2 adjective /sɪˈnɒptɪk/

synoptic

Meaning
giving a general overview or summary; presenting a broad view
Example
The report offers a synoptic view of climate trends over the past century.
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 noun /ˈʃɛərˌhoʊldər/

shareholder

Meaning
an individual or organization that owns shares in a company
Example
Each shareholder has the right to vote at the annual meeting.
B2 adverb /ˈskeəs.li/

Scarcely

Meaning
hardly; barely; only just
Example
I could scarcely believe my eyes.
C2 noun /ˈsaʊər wʊd ˈæp.əl/

Sour wood apple

Meaning
a tropical fruit with hard shell and tangy flesh; elephant apple
Example
The sour wood apple has a unique taste that many people enjoy.
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.
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 noun /ˈsɪndɪkət/

syndicate

Meaning
A group of individuals or organizations combined to promote a common interest or carry out a business venture.
Example
A syndicate of investors bought the struggling company.
C2 noun /ˈspæŋɡəl/

spangle

Meaning
A small shiny piece of metal or plastic used for decoration on clothes.
Example
Her dress was covered with silver spangles that glittered in the light.
B2 noun /səˈplaɪə(r)/

supplier

Meaning
a person or company that provides goods or services
Example
The supplier delivered the products on time.
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.
C2 noun /ˈsweɪʒən/

suasion

Meaning
the act of persuading or influencing someone
Example
The leader used gentle suasion to win support for the plan.
A1 verb /stɒp/

stop

Meaning
to cease moving or operating; to halt; to prevent
Example
Please stop talking during the movie.
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 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.
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.
C1 verb /skɪmp/

skimp

Meaning
to use less of something than is necessary in order to save money or effort
Example
Don’t skimp on quality when buying a new laptop.
B1 noun /steɪk/

steak

Meaning
a thick slice of meat, typically beef, cooked by grilling or frying
Example
He ordered a grilled steak with vegetables.
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.