Biosphere
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C1 noun /ˈbaɪoʊˌsfɪr/

Biosphere

Meaning
the regions of the surface and atmosphere of the earth occupied by living organisms
Example
Climate change is affecting the entire biosphere.
B1 adjective /ˈblʌdi/

bloody

Meaning
covered in, involving, or containing blood; also used informally for emphasis in British English.
Example
The soldier returned from battle with a bloody arm.
B2 noun breɪn ˈtreɪ.nɪŋ

brain-training

Meaning
Mental exercises designed to improve cognitive functions, memory retention, and overall brain performance.
Example
Regular brain-training can improve memory retention.
C1 adjective /bɪˈnaɪn/

benign

Meaning
Gentle, kind, or not harmful (especially of a disease or tumor).
Example
The doctor assured her that the tumor was benign.
B2 noun /ˈbel.i/

Belly

Meaning
the front part of the human trunk below the ribs, containing the stomach and bowels; abdomen
Example
The baby kicked in her belly during pregnancy.
C2 adjective /ˈbuːtləs/

bootless

Meaning
Useless or futile; of no benefit.
Example
His bootless attempt to fix the machine only wasted time.
B2 noun ˈbʌtərflaɪ ˌpɒpjəˈleɪʃən

Butterfly Population

Meaning
The total number of butterflies in a particular area or ecosystem.
Example
The butterfly population is declining due to habitat loss.
C1 verb /ˈbɒɡəl/

boggle

Meaning
to overwhelm or confuse; to be astonished or puzzled by something
Example
The complexity of the puzzle boggled his mind.
C1 noun /ˈbænɪstər/

banister

Meaning
a railing supported by posts at the side of a staircase or balcony
Example
She held the banister tightly while going down the stairs.
A2 noun /bæˈleɪ/

ballet

Meaning
a highly stylized and artistic form of dance
Example
She has trained for years in classical ballet.
C2 noun /bəˈlɛəroʊ/

bolero

Meaning
A Spanish dance in slow triple time, or a short jacket open at the front.
Example
The dancers performed a passionate bolero at the festival.
B2 verb /bɑːrk/

bark

Meaning
to make a sharp sound like a dog; to speak angrily
Example
The dog barks at strangers.
C2 noun /ˈbreɪziər/

Brazier

Meaning
a worker in brass; a portable container for burning charcoal or coal
Example
The brazier crafted beautiful brass ornaments.
B2 noun/verb /briːtʃ/

breach

Meaning
A violation or breaking of a law, agreement, or code of conduct; an act of breaking or failing to observe a law, agreement, or code of conduct.
Example
The company faced a breach of data security.
B2 noun /bent/

Bent

Meaning
a natural inclination or talent; a strong interest or liking for something
Example
She has a natural bent for music and art.
B1 noun /blaʊz/

Blouse

Meaning
a woman's loose upper garment resembling a shirt
Example
She wore a beautiful silk blouse to the party.
C2 verb /baɪd/

bide

Meaning
to wait patiently for the right time or opportunity
Example
He decided to bide his time before making a move.
C1 adjective /ˈbloʊtɪd/

bloated

Meaning
swollen or puffed up, often unpleasantly
Example
After the big meal, he felt bloated and uncomfortable.
C2 verb /beɪst/

baste

Meaning
to pour or brush melted fat, juices, or liquid over meat during cooking to keep it moist
Example
She basted the turkey every 30 minutes to keep it juicy.
A2 noun, verb /bræntʃ/

branch

Meaning
A part of a tree that grows out from the trunk; a division of an organization or subject.
Example
The company opened a new branch in Dhaka.
C2 noun /brəˈkeɪd/

brocade

Meaning
a rich fabric woven with a raised pattern, often in gold or silver thread
Example
She wore a beautiful brocade dress to the wedding.
B2 verb /blɛnd/

blend

Meaning
to mix things together smoothly; to combine harmoniously
Example
She blends the ingredients carefully.
C2 verb /beɪt/

bate

Meaning
to lessen or restrain; to diminish the force or intensity of something
Example
He spoke with bated breath as he waited for the result.
C2 adjective /ˈbiːstiəl/

bestial

Meaning
Relating to beasts; showing savagery, brutality, or lacking human sensibility.
Example
The prisoners were treated in a bestial manner.
A1 adjective /ˈbjuː.tɪ.fəl/

Beautiful

Meaning
pleasing to the senses; attractive; having qualities that give great pleasure
Example
She has a beautiful voice that captivates everyone.
B1 noun /ˈblen.dər/

Blender

Meaning
an electric kitchen appliance used to mix, purée, or emulsify food and liquids
Example
She used the blender to make a delicious smoothie.
C1 noun /ˈbæləd/

ballad

Meaning
a narrative song or poem, often sentimental or romantic
Example
The singer performed a moving ballad about lost love.
A1 noun /ˈbrʌðər/

brother

Meaning
a male sibling
Example
My brother is two years older than me.
C2 verb /ˈbleɪzən/

blazon

Meaning
to display prominently or vividly
Example
The slogan was blazoned across the banner in bold letters.
B2 noun/verb /ˈbʌfər/

buffer

Meaning
Something that lessens or absorbs the impact of a shock; to act as a protective barrier.
Example
The organization acts as a buffer between workers and management.
C1 adjective /ˈbuːzi/

boozy

Meaning
containing or involving a lot of alcohol; slightly drunk from alcohol
Example
The party became boozy as the night went on.
A1 adjective /ˈbɔːrɪŋ/

boring

Meaning
not interesting or exciting; dull.
Example
The lecture was so boring that several students fell asleep.
C2 verb /bɪˈliːɡər/

beleaguer

Meaning
to cause difficulties, troubles, or harassment; to surround with military forces
Example
The company was beleaguered by constant complaints from its customers.
C1 noun /ˈbʊzəm/

bosom

Meaning
the human chest, especially a woman’s breast; also used metaphorically to refer to closeness or intimacy
Example
She kept the secret close to her bosom.
A1 noun /bred/

Bread

Meaning
a food made from flour, water, and yeast mixed together and baked
Example
She bought fresh bread from the bakery.
A2 adjective /ˈbrɪtɪʃ/

british

Meaning
relating to Great Britain or its people
Example
She loves British culture and traditions.
C1 verb /bɪˈmoʊn/

bemoan

Meaning
To express discontent or sorrow over something.
Example
Critics bemoaned the lack of diversity in the film.
B2 verb /blʌʃ/

blush

Meaning
to become red in the face due to embarrassment or shyness
Example
She blushed when he complimented her.
A2 noun/verb /ˈbʌdʒɪt/

budget

Meaning
An estimate of income and expenditure for a set period of time; to plan expenses and income.
Example
The family created a budget to manage their expenses.
C2 noun /ˌbræɡəˈdoʊʃioʊ/

braggadocio

Meaning
boastful or arrogant behavior; empty boasting
Example
His endless braggadocio annoyed everyone at the party.
B2 adjective /boʊld/

Bold

Meaning
brave; confident; daring
Example
He made a bold decision to start his own business.
C1 noun /ˈbuːt.stræp.ɪŋ/

bootstrapping

Meaning
Starting a business with personal resources or small investments without external funding or venture capital.
Example
Many entrepreneurs rely on bootstrapping to launch their businesses.
C2 verb /ˈbeɪɪŋ/

baying

Meaning
making a loud, prolonged barking or howling sound, especially of dogs
Example
The baying of the hounds echoed through the forest.
C2 verb /ˈblʌstər/

bluster

Meaning
to speak loudly in an aggressive or threatening way, often without real power
Example
The manager blustered about firing people but did nothing.
C1 adjective /ˈbæʃ.fəl/

Bashful

Meaning
shy; timid; modest; easily embarrassed
Example
The bashful child hid behind her mother when meeting strangers.
B1 noun /bend/

Bend

Meaning
a curved or angled part of something; a turning point in a road or river
Example
There is a sharp bend in the river ahead.
A2 noun /ˈbɪznəsˌwʊmən/

businesswoman

Meaning
a woman who works in business, especially one who owns or manages a company
Example
The businesswoman expanded her company into international markets.
C2 noun /brɔːn/

brawn

Meaning
physical strength in contrast to intelligence
Example
He used his brawn to lift the heavy box.
C2 noun /ˈbɑːr.nɪ.kəl/

Barnacle

Meaning
a marine crustacean that attaches itself permanently to underwater surfaces
Example
The old ship's hull was covered with barnacles.
A2 verb /bɪld/

build

Meaning
to make something by putting materials together; to construct
Example
They will build a new school in our neighborhood.
A1 adjective /bluː/

Blue

Meaning
having the color of the clear sky or the sea
Example
The blue ocean stretched endlessly to the horizon.
B2 adjective /ˌbaɪəʊdɪˈɡreɪdəbl/

biodegradable

Meaning
Capable of being decomposed by natural biological processes, typically by bacteria or other living organisms, without causing harm to the environment.
Example
Biodegradable materials break down naturally without harming the environment.
B1 noun /bɑːm/

Bomb

Meaning
an explosive device designed to cause damage or destruction
Example
The bomb disposal unit carefully defused the explosive device.
C1 noun /bəˈrɒmɪtər/

barometer

Meaning
an instrument that measures atmospheric pressure
Example
The barometer indicated a storm was approaching.
C2 verb /ˈbraʊˌbiːt/

browbeat

Meaning
To intimidate or bully someone into doing something
Example
The lawyer tried to browbeat the witness.
C2 noun /ˌbeɪt ˈnwɑːr/

bete noire

Meaning
A person or thing that one particularly dislikes or fears.
Example
Grammar has always been his bete noire.
C2 noun /ˈbriːzˌweɪ/

breezeway

Meaning
A roofed outdoor passage, often connecting two buildings.
Example
The breezeway connected the house to the garage.
C2 adjective /baɪˈkæmərəl/

bicameral

Meaning
Having two branches or chambers, especially in a legislature.
Example
The United States has a bicameral legislature consisting of the Senate and the House of Representatives.
B1 noun /ˈbed ˌkʌv.ər/

Bed cover

Meaning
a protective covering for a bed, typically a bedspread or comforter
Example
She pulled the bed cover up to her chin to stay warm.
B1 noun ˈbæriə(r)

barrier

Meaning
A fence or other obstacle that prevents movement or access.
Example
The barrier prevented entry.
C1 noun /braɪn/

brine

Meaning
Water saturated with salt, often used for preserving food.
Example
The olives were stored in brine to keep them fresh.
C1 verb /bloʊt/

bloat

Meaning
to swell or cause to swell, often due to fluid or gas
Example
Eating too much junk food can bloat your stomach.
C1 noun /ˈbrɛvɪti/

brevity

Meaning
Concise and exact use of words in writing or speech.
Example
The brevity of the speech kept the audience engaged.
B1 noun ˈbaʊndəri

boundary

Meaning
A line that marks the limits of an area; a dividing line.
Example
The river marks the boundary.
B2 noun, verb /ˈblækmeɪl/

blackmail

Meaning
the act of demanding money or advantage by threatening to reveal secrets; to force someone to act by using such threats
Example
He tried to blackmail her by threatening to reveal the documents.
C2 noun /brɪˈtæniə/

britannia

Meaning
the personification of Britain, often shown as a woman with a helmet and shield
Example
Britannia has been a symbol of Britain since Roman times.
A2 noun /ˈbɑt.əm/

Bottom

Meaning
the lowest point or part of something; the ground under a body of water
Example
The treasure chest was lying at the bottom of the ocean.
B1 verb /blɛs/

bless

Meaning
to give divine favor; to ask for God's favor
Example
The priest blessed the congregation.
B1 noun /bʊʃ/

bush

Meaning
a plant with many small branches growing close to the ground; a shrub
Example
A rabbit was hiding under the bush.
C1 noun /bɑːrb/

barb

Meaning
a sharp projection such as on a fishhook; a cutting remark
Example
The fishhook has a small barb to keep the fish from escaping.
B2 verb /bɪˈtreɪ/

betray

Meaning
to be disloyal to; to reveal secrets
Example
He felt betrayed by his closest friend.
B2 noun /ˈbætʃələr/

Bachelor

Meaning
an unmarried man; a person who holds a first degree from a university
Example
He remained a bachelor all his life and earned a bachelor's degree in engineering.
C1 adjective /ˈbaʊn.tɪ.fəl/

bountiful

Meaning
Large in quantity; abundant; generous in giving.
Example
The farmer was grateful for the bountiful harvest.
B1 noun /ˈbʌb.əl/

bubble

Meaning
a thin sphere of liquid enclosing air or gas; a temporary state of inflated value or excitement
Example
The children chased the bubbles in the air.
B2 verb, noun, adjective /baʊnd/

bound

Meaning
To move with large strides or jumps; also refers to being tied, limited, or certain.
Example
The dog bounded across the field with joy.
B2 noun /ˈbrɔːdˌkæstər/

broadcaster

Meaning
a person or organization that transmits a broadcast program.
Example
The broadcaster aired the match live to millions of viewers.
C2 noun /ˌbɒmbərˈdɪər/

bombardier

Meaning
a member of a bomber crew responsible for releasing bombs
Example
The bombardier released the bombs with precision.
C2 verb /bɪˈtəʊkən/

betoken

Meaning
to be a sign or indication of something
Example
Dark clouds betoken an approaching storm.
B2 adverb /ˈbrɔːdli/

broadly

Meaning
in a general or wide manner.
Example
The rules are broadly similar across all regions.
C1 noun/verb /ˈbæntər/

banter

Meaning
playful and friendly exchange of teasing remarks
Example
The colleagues enjoyed some light banter during the meeting.
C2 noun /buːb/

boob

Meaning
a foolish or clumsy person; an informal and sometimes rude term for a woman's breast
Example
He felt like a complete boob after forgetting the meeting.
C2 verb /ˈbændi/

bandy

Meaning
To pass (words, ideas, or gossip) back and forth in a casual or argumentative way.
Example
They bandied jokes across the table.
C1 noun /ˌbaɪˈlæt.ər.əl nɪˌɡəʊ.ʃiˈeɪ.ʃənz/

bilateral negotiations

Meaning
Negotiations or discussions between two parties, typically countries or organizations.
Example
Bilateral negotiations resolve disputes.
B2 noun /bluːz/

blues

Meaning
a feeling of sadness; a style of music with melancholy themes
Example
Listening to blues music always calms him down.
B2 noun /boʊst/

Boast

Meaning
an act of talking with excessive pride about one's achievements
Example
His constant boast about his wealth annoyed everyone.
A2 verb /ˈbɒðər/

bother

Meaning
to annoy, worry, or cause trouble to someone
Example
I don't want to bother you while you're working.
C2 noun /ˌbædɪˈnɑːʒ/

badinage

Meaning
Playful and humorous conversation; banter.
Example
The friends enjoyed a light badinage over coffee.
B1 noun /bɔɪl/

Boil

Meaning
a painful, pus-filled bump under the skin caused by infected hair follicles
Example
The painful boil on his neck required medical treatment.
B2 noun /bʌd/

Bud

Meaning
An undeveloped or immature flower before it opens
Example
The rose bud will bloom into a beautiful flower in a few days.
B2 adjective /bɪˈliːvəbl̩/

believable

Meaning
Able to be trusted or accepted as true or reasonable.
Example
Her story was so detailed that it sounded believable.
A2 verb /bæt/

bat

Meaning
to hit with a bat; to flutter eyelids
Example
She bats her eyelashes flirtatiously.
A1 noun /bæk/

Back

Meaning
the rear surface of the human body from the shoulders to the hips; the spine
Example
She hurt her back while lifting heavy boxes.
A2 noun /bɪər/

beer

Meaning
An alcoholic drink made from yeast-fermented malt flavored with hops.
Example
He ordered a glass of cold beer at the bar.
C2 verb /bɪˈleɪ/

belay

Meaning
to secure a rope by winding it around an object; to stop or cancel an order (nautical/military use)
Example
The climber asked his partner to belay the rope tightly.
B2 noun /ˈbʌf.ə.loʊ/

Buffalo

Meaning
a large wild ox with heavy horns; American bison
Example
The buffalo grazed peacefully in the meadow.
A2 verb /bleɪm/

blame

Meaning
to hold responsible for a fault; to find fault with
Example
Don't blame me for the mistake.
A2 adjective /ˈbeɪ.sɪk/

Basic

Meaning
fundamental; essential; forming the foundation or starting point
Example
Learning basic English grammar is essential for beginners.
B1 verb /ˈbɔːrdɪŋ/

boarding

Meaning
Getting on or into a ship, aircraft, or other vehicle.
Example
The explorers were boarding the ship at the port.
C2 adjective /ˈbɪbjələs/

bibulous

Meaning
Excessively fond of drinking alcohol.
Example
His bibulous habits worried his family.
B2 adjective /bɪˈzɑːr/

bizarre

Meaning
very strange or unusual, especially so as to cause interest or amusement
Example
He told a bizarre story that no one could believe.
C1 verb /ˈbæfəl/

baffle

Meaning
to confuse; to be too difficult to understand
Example
The math problem baffles me completely.
A2 verb; adjective /broʊk/

broke

Meaning
past tense of break; having no money or being financially poor
Example
I broke my phone last night and now I’m completely broke.
C1 noun /ˈboʊ.ə/

Boa

Meaning
a large non-venomous snake that kills prey by constriction
Example
The boa constrictor wrapped around its prey.
A2 noun /buːt/

Boot

Meaning
sturdy footwear covering the foot and ankle or lower leg
Example
He laced up his hiking boots before the mountain trek.
C2 adverb /bɪˈtaɪmz/

betimes

Meaning
early; in good time
Example
She rose betimes to finish her work.
C1 noun /bɪz/

Biz

Meaning
business (informal); commercial enterprise or activity
Example
He's been in the restaurant biz for twenty years.
C2 verb /bɪˈstraɪd/

bestride

Meaning
To sit or stand astride something; to dominate over.
Example
The statue bestrides the city square.
C1 noun /ˈbɔɪənsi/ or /ˈbuːjənsi/

buoyancy

Meaning
The ability to float in a liquid; cheerfulness and optimism.
Example
Her natural buoyancy lifted the mood of the group.
C2 adjective /ˈbeɪlfəl/

baleful

Meaning
Threatening harm; menacing or expressing hatred.
Example
She gave him a baleful look after the insult.
B2 noun /ˈblʌn.dər/

blunder

Meaning
A stupid or careless mistake; a serious error in judgment.
Example
His blunder cost the company a fortune.
B2 noun /ˈboʊlər/

bowler

Meaning
a person who delivers the ball in cricket; also a type of hard felt hat with a rounded crown
Example
The bowler took three wickets in the first over.
B2 noun /biːt/

Beet

Meaning
a plant with a round dark red root that is eaten as a vegetable
Example
Roasted beet with goat cheese makes a delicious salad.
B1 noun /ˈbeɪ.kɪŋ ˈsoʊ.də/

Baking Soda

Meaning
sodium bicarbonate used in cooking and baking as a leavening agent
Example
Add a teaspoon of baking soda to make the cake fluffy.
C2 verb /bɪˈɡaɪl/

beguile

Meaning
to charm or enchant someone, often in a deceptive way
Example
She beguiled the audience with her storytelling.
A2 noun /brænd/

brand

Meaning
a type of product manufactured by a company under a particular name
Example
Nike is a popular brand of sportswear.
C2 adjective /bruːsk/ or /brʌsk/

brusque

Meaning
abrupt or blunt in manner or speech, often seen as rude
Example
His brusque reply ended the conversation.
C1 adjective /bɪˈleɪtɪd/

belated

Meaning
coming or happening later than expected or usual
Example
She sent me a belated birthday card.
C1 noun /ˈblɒk.ɪdʒ/

Blockage

Meaning
an obstruction that makes movement or flow difficult or impossible
Example
The drain blockage caused water to overflow in the kitchen.
A2 noun /ˈbʊkɪŋ/

booking

Meaning
the act of reserving accommodations, tickets, etc.
Example
I made a booking for a hotel room in advance.
B2 noun /bɪˈtreɪəl/

Betrayal

Meaning
the action of betraying one's country, group, or person; disloyalty
Example
His betrayal of their friendship hurt her deeply.
C2 noun /bəˈfuːn/

buffoon

Meaning
A ridiculous but amusing person; a clown or jester.
Example
He acted like a buffoon at the party, making everyone laugh.