stratum
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C1 noun /ˈstrɑːtəm/

stratum

Meaning
a layer or level of material, or a social class in society
Example
The upper stratum of society enjoyed privileges not available to others.
B1 verb /sɪŋk/

sink

Meaning
to go down below the surface; to descend
Example
The ship sinks in the deep ocean.
B1 verb /ʃɪft/

shift

Meaning
To move or change from one place, position, or situation to another.
Example
She had to shift her focus to the new project.
C1 adjective /ˈsɪlkən/

Silken

Meaning
made of silk; smooth and soft like silk
Example
She wore a beautiful silken dress to the party.
C2 noun /səbˈsɜːviəns/

subservience

Meaning
the condition of being too willing to obey or serve others
Example
His subservience to authority annoyed his colleagues.
C1 verb /ˈsælvɪdʒ/

salvage

Meaning
To save something from loss, damage, or destruction.
Example
They managed to salvage some goods from the fire.
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 səˈsteɪnəbl dɪˈvɛləpmənt

Sustainable Development

Meaning
Development that meets present needs without compromising the ability of future generations to meet their own needs.
Example
Eco-tourism contributes to sustainable development in local communities.
C1 adjective /ˈsnɒbɪʃ/

snobbish

Meaning
having or showing the attitude of people who think they are better than others
Example
She seemed snobbish because she avoided talking to the waiters.
B2 noun /ˈʃɪpɪŋ/

shipping

Meaning
the process of transporting goods
Example
The shipping of the products was delayed due to weather conditions.
C2 noun /sɪˈdɪʃ.ən/

Sedition

Meaning
conduct or speech inciting people to rebel against authority; treason
Example
The activist was charged with sedition for his inflammatory speeches.
C1 verb /ˈspɪərˌhɛd/

spearhead

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

succumb

Meaning
To give in to pressure, temptation, or illness; to yield or fail to resist.
Example
He finally succumbed to his illness after a long struggle.
C2 noun /ˈsælvoʊ/

salvo

Meaning
A simultaneous discharge of guns or release of bombs; a sudden outburst of cheers or applause.
Example
The soldiers fired a salvo to honor the fallen general.
B2 noun /ˈsɜr.neɪm/

Surname

Meaning
a hereditary name common to all members of a family; family name
Example
Please write your first name and surname on the form.
B1 adjective /ˈsætɪsfaɪd/

satisfied

Meaning
Pleased or content with what has been achieved or received.
Example
He felt satisfied after finishing his project.
B2 verb /spɪn/

spin

Meaning
To turn around quickly or cause something to rotate
Example
The dancer began to spin gracefully on the stage.
C1 adjective /stjuːˈpɛndəs/

stupendous

Meaning
extremely impressive; amazing in size, degree, or excellence
Example
The magician’s performance was simply stupendous.
A2 verb /ʃʌt/

shut

Meaning
to close something, especially a door or window
Example
Please shut the door before you leave.
A2 adjective /sər'praɪzd/

Surprised

Meaning
feeling or showing surprise; astonished
Example
I was surprised to see my old friend at the market.
A1 pronoun /ˈsʌmθɪŋ/

something

Meaning
an unspecified or unknown thing
Example
I think something is wrong with my phone.
A1 adjective /smɔːl/

Small

Meaning
little in size; not large; limited in extent or amount
Example
She lives in a small apartment near the university.
C1 verb /ˈsʌkɪŋ/

sucking

Meaning
Drawing in a liquid, air, or other substance through the mouth or a tube by creating a vacuum; also used figuratively for something unpleasant or ineffective
Example
The baby is sucking on a pacifier.
C2 noun /ˈsʌbtrəˌhɛnd/

subtrahend

Meaning
a number that is to be subtracted from another number
Example
In the equation 10 - 4, the number 4 is the subtrahend.
B1 noun, verb /ˈseɪ.lɪŋ/

sailing

Meaning
The act of traveling in a boat or ship using sails; the sport or activity of navigating a boat with sails.
Example
We went sailing on the lake during the summer.
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.
B1 noun /swiːt pəˈteɪtoʊ/

Sweet potato

Meaning
A root vegetable with sweet flesh, typically orange or purple in color
Example
Roasted sweet potato makes a healthy and delicious side dish.
C2 verb /ˈsʌpjʊˌreɪt/

suppurate

Meaning
to form or discharge pus, usually as a result of infection
Example
The wound began to suppurate after a few days.
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 /skænt/

Scant

Meaning
barely sufficient; inadequate; small in amount
Example
There was scant evidence to support his claim.
C1 verb /ˈskwɒndər/

squander

Meaning
to waste money, time, or opportunities in a careless way
Example
He squandered his inheritance on gambling.
A1 adjective /ˈsɔːri/

sorry

Meaning
feeling regret or sympathy
Example
She felt sorry for what had happened.
C1 noun /ˈsʌm.ɪt əv ðə ˈfjuː.tʃər/

Summit of the Future

Meaning
A high-level conference focused on addressing future challenges and opportunities.
Example
The Summit of the Future addressed global challenges.
C2 adjective /ˈsɪmiən/

simian

Meaning
Relating to, resembling, or affecting apes or monkeys.
Example
The scientist studied the simian behavior of the chimpanzees.
C2 noun /ˌsɪləbɪˈkeɪʃən/

syllabication

Meaning
The division of words into syllables.
Example
Proper syllabication helps in correct pronunciation.
A2 adverb /ˈsɪə.ri.əs.li/

seriously

Meaning
in a solemn or thoughtful manner
Example
She took the matter very seriously.
B1 adjective /səˈpəʊzd/

supposed

Meaning
generally believed or assumed, but not necessarily true
Example
This is the supposed solution to the problem.
B1 noun /ʃel/

Shell

Meaning
hard outer covering of an animal; explosive projectile for a gun
Example
The artillery fired a shell at the enemy position.
C1 verb /sɪndʒ/

singe

Meaning
To burn something superficially or lightly, especially at the edges.
Example
The fire singed his eyebrows.
C2 noun /ˈstrɪndʒənsi/

stringency

Meaning
the quality of being strict, precise, or severe
Example
The stringency of the new rules surprised everyone.
B2 noun /ˈskriːnɪŋ/

screening

Meaning
the act of examining or testing people to detect disease or evaluate suitability; a showing of a movie or program
Example
The hospital offered free health screening for all employees.
B2 adjective /ˈsoʊloʊ/

solo

Meaning
performed by one person alone; a single performance
Example
She decided to perform a solo dance at the talent show.
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 /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.
B2 noun /ˌsɛpəˈreɪʃən/

Separation

Meaning
the action or state of moving or being moved apart; the division of something into constituent or distinct elements
Example
The separation of the two countries was peaceful.
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.
B2 noun, verb /sɪn/

sin

Meaning
an immoral act considered to be a transgression against divine law; to commit an offense against religious or moral law
Example
He confessed his sin to the priest.
B2 noun /sfɪər/

sphere

Meaning
a round, three-dimensional shape that is perfectly symmetrical around its center; an area of activity or knowledge
Example
The Earth is almost a perfect sphere.
B1 noun ˈsaɪləns

silence

Meaning
Complete absence of sound; quietness.
Example
Silence filled the air near the graves.
B2 verb /soʊ/

sow

Meaning
to plant seeds in the ground; to scatter seeds for growing
Example
The farmer will sow wheat seeds in the field tomorrow.
B2 noun /siːdʒ/

Sieze

Meaning
a military operation to capture a place by surrounding it and cutting off supplies
Example
The siege of the castle lasted for three months.
B2 verb /spreɪ/

spray

Meaning
to apply liquid to something in a fine mist
Example
She sprayed perfume on her wrist before leaving.
C1 verb /sɪˈkriːt/

secrete

Meaning
to produce and release a substance from a cell, gland, or organ
Example
The pancreas secretes insulin to regulate blood sugar levels.
B2 noun /slɒt/

slot

Meaning
a narrow opening into which something fits or is placed
Example
Insert the card into the slot to open the door.
B2 adjective /ˈstæt.ɪk/

static

Meaning
Lacking in movement, action, or change; stationary.
Example
Static ideas hinder progress.
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.
C2 noun /sɪˈkwiːlə/

sequela

Meaning
A condition that is the consequence of a previous disease or injury.
Example
Lung scarring can be a sequela of severe pneumonia.
C1 noun /ˈskep.tɪ.sɪ.zəm/

skepticism

Meaning
A skeptical attitude; doubt as to the truth of something.
Example
His skepticism about new technology often makes him resistant to change.
B2 noun /ˌsoʊsiˈɑːlədʒi/

sociology

Meaning
the study of society, human relationships, and social institutions
Example
She is studying sociology at university.
B2 noun ˌsɛlf.kənˈtrəʊl

self-control

Meaning
The ability to control one's emotions, behavior, and desires in order to obtain some reward, or avoid some punishment, typically in the longer term.
Example
Self-control is important for maintaining a balanced life.
C1 verb /spɜːr/

spur

Meaning
To encourage or motivate someone to take action.
Example
The teacher's praise spurred him to study harder.
C1 verb /snɪər/

sneer

Meaning
to smile or speak in a mocking or contemptuous way
Example
She sneered at his attempt to sing.
C1 verb /slɪŋ/

sling

Meaning
to throw or hang something roughly or carelessly
Example
He slung his bag over his shoulder before leaving.
C1 /ʃrɛd/

shred

Meaning
to tear or cut something into small pieces
Example
She shredded the old documents before throwing them away.
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.
B2 adjective /ˌsɪstəˈmætɪk/

systematic

Meaning
Done or acting according to a fixed plan or system; methodical.
Example
The company took a systematic approach to solving the issue.
B2 noun /slæŋ/

Slang

Meaning
very informal language that is usually spoken rather than written
Example
The teenagers used slang that their parents couldn't understand.
B2 noun /ˈsɒr.oʊ/

Sorrow

Meaning
a feeling of deep distress caused by loss or disappointment
Example
His heart was filled with sorrow after the tragedy.
C1 adjective /ˈsɒnɪk/

sonic

Meaning
Relating to or involving sound waves or speed of sound.
Example
The jet created a loud boom when it broke the sonic barrier.
C1 adjective /səbˈvɜːrsɪv/

subversive

Meaning
seeking or intended to undermine or overthrow an established system or authority
Example
The group was banned for its subversive activities.
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.
C1 noun ˈsɛlf pəˈzɪʃən

self-possession

Meaning
The quality of being calm and confident and in control of one's emotions; composure.
Example
His self-possession during the crisis was remarkable.
C1 verb /ˈsɛvər/

sever

Meaning
to cut off or separate, especially by cutting; to end a connection or relationship
Example
He had to sever ties with the company after the dispute.
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.
A2 adjective /ʃaɪ/

Shy

Meaning
nervous or timid in the company of other people
Example
The shy student rarely spoke up in class discussions.
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 noun /ˈʃɜːrbət/

sherbet

Meaning
a sweet flavored drink or a frozen dessert made from sweetened fruit juice
Example
On hot days, she enjoys a glass of lemon sherbet.
C1 noun sælˈveɪʃən

salvation

Meaning
Deliverance from sin and its consequences, believed by Christians to be brought about by faith in Christ.
Example
The story revolves around the theme of salvation.
B2 noun /ˈswɒl.oʊ/

Swallow

Meaning
a small migratory bird with long wings and a forked tail
Example
The swallow built its nest under the roof.
A1 noun /saɪd/

side

Meaning
a position to the left or right of something
Example
The store is on the side of the road.
C1 adjective /səbˈmɪs.ɪv/

Submissive

Meaning
ready to obey others; yielding to authority; humble and compliant
Example
She became submissive after years of harsh treatment.
B1 noun səˈplaɪ

supply

Meaning
A stock or amount of something supplied or available for use.
Example
Supply chains ensure resource availability.
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.
A2 noun /ˈsɪstəm/

system

Meaning
a set of connected parts forming a complex whole; an organized method
Example
The education system needs major reforms.
C1 noun /ˈskaʊndrəl/

scoundrel

Meaning
a dishonest or unscrupulous person; a villain
Example
That scoundrel cheated the old man out of his savings.
C2 adjective /sʌbˈlɪŋɡwəl/

sublingual

Meaning
situated or applied under the tongue
Example
The doctor prescribed a sublingual tablet for faster absorption.
B2 noun ˈsuː.pər.fuːdz

superfoods

Meaning
Nutrient-dense foods that are particularly beneficial for health and well-being.
Example
Blueberries and spinach are superfoods rich in vitamins.
C2 noun/verb /ˈsoʊdʒɜrn/

sojourn

Meaning
A temporary stay at a place; to stay temporarily
Example
She enjoyed a brief sojourn in Paris during the summer.
C2 noun /ˌʃæŋɡriˈlɑː/

shangri-la

Meaning
a remote, beautiful, imaginary place where life is perfect and peaceful
Example
They described the island as a modern-day Shangri-La.
B2 noun /ˈʃuːtɪŋ/

shooting

Meaning
the action of shooting a gun, camera, or similar device
Example
The shooting of the movie took several months.
A2 noun /stɛps/

steps

Meaning
A measure or action, especially one of a series taken in order to deal with or achieve a particular thing.
Example
Taking small steps reduces overwhelm.
C1 noun ˌsɪstəˈmætɪk ˈseɪvɪŋz

systematic savings

Meaning
A structured and organized approach to regularly saving money according to a planned schedule
Example
Systematic savings can mitigate financial crises in old age.
B2 adjective ˈsiːm.ləs

seamless

Meaning
A process or service that works without any interruption.
Example
A seamless checkout process improves user satisfaction.
B2 verb ˈsiːlɪŋ

sealing

Meaning
The action of closing or blocking something to prevent entry or escape.
Example
Sealing cracks in the walls can prevent pests from entering.
B1 verb /spaɪ/

spy

Meaning
to secretly collect information about a person, group, or country
Example
He was caught spying on his neighbor through the window.
A2 adverb /ˈsʌm.weər/

Somewhere

Meaning
in or at some place; in an unspecified location
Example
I left my keys somewhere in the house.
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.
A1 verb /ˈstʌdi/

study

Meaning
to learn about something; to examine carefully; to research
Example
I study mathematics every evening.
B1 noun /ˈsɪɡ.nəl/

Signal

Meaning
a gesture, action, or sound that conveys information or instruction
Example
The traffic signal turned red, so we stopped.
B2 noun ˈsʌbstɪˌtut

substitute

Meaning
A person or thing acting or serving in place of another.
Example
Money cannot be a substitute for genuine happiness.
C1 verb /snɪp/

snip

Meaning
to cut something quickly with scissors or a sharp tool
Example
She snipped the loose thread from her dress.
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 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.
A2 noun /sneɪk/

Snake

Meaning
a long, legless reptile that moves by sliding along the ground
Example
The snake slithered through the grass quietly.
C2 adjective /ˈslʌvənli/

slovenly

Meaning
Untidy or careless in appearance, habits, or work.
Example
His slovenly appearance made a bad impression at the interview.
B1 verb /stɛə/

stare

Meaning
to look at something with a fixed gaze
Example
She stared at the painting for hours.
B2 verb /ˈʃɔːrtn/

shorten

Meaning
To make something shorter in length, duration, or extent
Example
She decided to shorten her speech to fit the time limit.
B2 adjective /swɪft/

swift

Meaning
moving very quickly; happening promptly
Example
The river current was swift after the heavy rain.
B2 adjective /ˈspɛʃəˌlaɪzd/

specialized

Meaning
designed or developed for a particular purpose or function
Example
He has a specialized knowledge of ancient civilizations.
C2 adjective /ˈsɛrid/

serried

Meaning
pressed or crowded together, often in rows or ranks
Example
The soldiers stood in serried ranks, ready for inspection.
C2 noun /ˈseɪ.li.əns/

salience

Meaning
The quality of being particularly noticeable or important; prominence.
Example
The salience of the issue was highlighted in the debate.
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 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.
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.
B2 noun /steɪn/

Stain

Meaning
a colored patch or dirty mark that is difficult to remove; a blemish or damage to reputation
Example
There was a coffee stain on his white shirt.
A2 verb /ˈstɑːtɪŋ/

starting

Meaning
beginning to do or experience something
Example
She is starting a new job next week.
A2 noun /səˈluː.ʃən/

Solution

Meaning
an answer to a problem; a liquid mixture
Example
We need to find a solution to this problem.
C2 adjective ˌsʌr.əpˈtɪʃ.əs

surreptitious

Meaning
Kept secret, especially because it would not be approved of; done stealthily.
Example
She took a surreptitious glance at his notes.
B2 adjective sɪnˈθet̬.ɪk

synthetic

Meaning
Made by chemical synthesis, especially to imitate a natural product; artificial.
Example
Synthetic chemicals are used in processed foods.
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.