Butterfly Population
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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.
C2 adjective /ˈbɑː.bər.əs/

Barbarous

Meaning
extremely cruel; uncivilized; savage
Example
The barbarous treatment of prisoners was condemned by human rights organizations.
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.
C2 noun /ˈbrɪk ə ˌbræk/

bric-a-brac

Meaning
Small decorative objects or ornaments, often of little value.
Example
The shelves were filled with old bric-a-brac from her travels.
C2 noun /ˈbækənæl/

bacchanal

Meaning
A noisy party involving drinking and revelry.
Example
The festival turned into a wild bacchanal by midnight.
C2 noun /ˈbuː.jɒ̃/

bouillon

Meaning
A clear, seasoned broth made by simmering meat, fish, or vegetables in water.
Example
She added vegetables to the bouillon for extra flavor.
A2 preposition /bɪˈsaɪd/

beside

Meaning
next to or at the side of someone or something
Example
She sat beside her best friend during the ceremony.
C1 verb /bruːd/

brood

Meaning
to think deeply about something that makes one unhappy; also, a group of young birds hatched at the same time
Example
He sat alone, brooding over his failures.
B2 noun /ˈbeə.rər/

Bearer

Meaning
a person who carries or brings something; holder of a document
Example
The bearer of this message must deliver it quickly.
C1 noun /ˈbɛd.rɒk/

bedrock

Meaning
the solid rock layer beneath the soil; the fundamental basis of something
Example
Trust is the bedrock of a healthy relationship.
C2 noun /ˈbɒdɪs/

bodice

Meaning
the part of a woman's dress that covers the body from the neck to the waist
Example
She wore a dress with an embroidered bodice.
C2 verb /blæsˈfiːm/

blaspheme

Meaning
to speak irreverently about God or sacred things
Example
He was accused of blaspheming during the heated argument.
C2 adjective /ˌbækəˈneɪliən/

bacchanalian

Meaning
Characterized by or involving drunken revelry.
Example
The students threw a bacchanalian party after the exams.
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 noun /bænˈdænə/

bandanna

Meaning
A large, often brightly colored handkerchief, typically worn on the head or around the neck.
Example
He tied a red bandanna around his neck.
C2 adjective /bɪˈhoʊldən/

beholden

Meaning
indebted or obliged to someone for a service or help
Example
He felt beholden to his mentor for all the guidance.
C2 noun /ˈbed.ləm/

Bedlam

Meaning
a scene of noisy confusion; chaos and disorder
Example
The classroom was complete bedlam after the fire alarm.
B2 noun /ˈbærəl/

barrel

Meaning
a large cylindrical container used to hold liquids
Example
The wine was stored in a wooden barrel.
B2 noun /ˈbiː.təl/

Beetle

Meaning
a hard-bodied insect with wing covers
Example
The black beetle scurried across the garden path.
C2 noun /bɪˈtroʊðəl/

betrothal

Meaning
The formal engagement to be married.
Example
Their betrothal was announced to the whole village.
C1 noun /baɪl/

Bile

Meaning
a bitter greenish-brown alkaline fluid that aids digestion and is secreted by the liver and stored in the gallbladder
Example
The liver produces bile to help digest fats.
C1 noun /bɪˈtreɪər/

Betrayer

Meaning
a person who betrays someone or something; one who is disloyal
Example
The betrayer was exposed and faced severe consequences.
B2 noun ˈbleɪzə

blazer

Meaning
A coloured jacket worn by members of a club, team, or school as part of a uniform.
Example
He looked sharp in his navy blue blazer at the event.
C2 verb /bɪˈfuːl/

befool

Meaning
to deceive or trick someone into believing something false; to make someone appear foolish
Example
The scammer tried to befool innocent people with fake promises.
C2 noun /ˈbɑːr.kəˌroʊl/

barcarole

Meaning
a traditional Venetian boat song, often in 6/8 time
Example
The orchestra played a beautiful barcarole that reminded me of Venice.
B2 noun /ˈbaɪoʊ ˌdeɪtə/

Bio-data

Meaning
biographical data; a resume or curriculum vitae containing personal and professional information
Example
Please submit your bio-data along with the job application.
C2 noun /ˈbroʊɡən/

brogan

Meaning
A heavy, sturdy shoe, often made of leather.
Example
The farmer wore old brogans while working in the field.
C2 noun /ˈbɜːrsər/

bursar

Meaning
An official in a school or college responsible for financial affairs.
Example
The bursar approved the budget for the new library.
C2 verb /ˈbækˌslaɪd/

backslide

Meaning
To relapse into bad habits, undesirable practices, or moral decline.
Example
After months of progress, he began to backslide into old habits.
C2 noun /ˈbɛnɪfɪs/

benefice

Meaning
a permanent church appointment for which property and income are provided
Example
The bishop appointed him to a wealthy benefice.
B2 adverb /ˈbəʊld.li/

Boldly

Meaning
in a confident and brave way; without fear
Example
She boldly stepped forward to face the challenge.
B2 adjective /bəˈtænɪkəl/

botanical

Meaning
relating to plants or plant life
Example
She works at the botanical garden.
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.
B2 adjective /ˈbɪtər/

Bitter

Meaning
having a sharp, pungent taste; feeling or showing anger and disappointment
Example
The medicine had a bitter taste.
C2 verb /bɪˈhuːvz/

behooves

Meaning
third person singular form of 'behoove'; means it is proper or necessary
Example
It behooves every citizen to follow the law.
B2 noun /brɑːnz/

bronze

Meaning
a metal made by combining copper and tin, often used for statues and medals
Example
The statue was made of solid bronze.
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 /ˈbeɪ.kɪŋ ˈpaʊ.dər/

Baking Powder

Meaning
a dry chemical leavening agent used to increase volume and lighten texture in baked goods
Example
The recipe calls for two teaspoons of baking powder.
A1 determiner/pronoun /boʊθ/

both

Meaning
referring to two people or things together
Example
Both of the children were excited about the trip.
B2 adjective /bɪˈkʌmɪŋ/

becoming

Meaning
attractive, suitable, or flattering to the wearer or situation
Example
That dress is very becoming on her.
C1 adjective /ˈbær.ən/

Barren

Meaning
sterile; unable to produce; desolate; unproductive
Example
The barren desert stretched for miles without any vegetation.
C2 verb /bɪˈmjuːz/

bemuse

Meaning
To confuse or puzzle someone.
Example
The complex instructions bemused the new employees.
C1 noun /bɒmˈbɑːrdmənt/

bombardment

Meaning
a continuous attack with bombs or other projectiles
Example
The city endured a heavy bombardment during the war.
A2 noun /ˈbenɪfɪt/

Benefit

Meaning
an advantage or profit gained from something; a helpful or good effect
Example
Exercise has many health benefits for your body.
A1 noun, verb /baɪk/

bike

Meaning
a bicycle or motorcycle; to ride a bicycle
Example
He biked to school every day.
C1 noun /brəˈzɪər/

Brassiere

Meaning
a woman's undergarment designed to support the breasts
Example
She bought a comfortable brassiere for daily wear.
C2 adjective /ˈbeɪlfəl/

baleful

Meaning
Threatening harm; menacing or expressing hatred.
Example
She gave him a baleful look after the insult.
A2 noun/verb /bəˈluːn/

balloon

Meaning
A small bag made of thin rubber or similar material that can be inflated with air or gas; as a verb, to expand rapidly.
Example
The children played with a red balloon at the party.
C1 verb /ˈbædʒər/

badger

Meaning
To repeatedly ask or annoy someone with demands or questions.
Example
The reporter kept badgering the politician with questions.
C1 noun /ˈbɪɡətri/

bigotry

Meaning
Intolerance toward those who hold different opinions or lifestyles.
Example
Her bigotry prevented her from accepting people with different beliefs.
C2 noun /ˌbaɪ.oʊ.rɪˌmiː.diˈeɪ.ʃən/

bioremediation

Meaning
The use of living organisms to neutralize or remove environmental contaminants.
Example
Bioremediation helps remove toxins from polluted soil.
A1 verb (past participle of 'bear'), adjective /bɔːrn/

born

Meaning
To come into life; brought into existence.
Example
He was born in Dhaka in 1995.
C2 noun /bəˈsuːn/

bassoon

Meaning
a large woodwind instrument with a deep sound
Example
The orchestra featured a beautiful bassoon solo.
B2 verb /buːm/

boom

Meaning
to make a loud deep sound; to grow or increase rapidly
Example
The thunder boomed across the sky.
C2 noun /ˈbɑːrtərər/

barterer

Meaning
A person who trades goods or services without using money.
Example
The barterer exchanged fruits for some pottery.
B2 adjective /ˌbaɪəˈlɒdʒɪkl̩/

biological

Meaning
relating to the science of biology or to life and living organisms
Example
She is studying biological sciences at university.
C2 noun ˈbaɪəʊˌsaɪd

biocide

Meaning
A chemical substance or microorganism intended to destroy, deter, render harmless, or exert a controlling effect on any harmful organism.
Example
Biocides help control pests and reduce the spread of diseases.
C1 adjective /ˈbrɪtl/

brittle

Meaning
easily broken or cracked; hard but liable to break
Example
The glass was so brittle that it cracked easily.
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 /braʊz/

browse

Meaning
To look at or skim through casually, especially online or in a store
Example
She likes to browse books in the library.
B2 adjective /ˈbraʊn.ɪʃ/

Brownish

Meaning
having a color somewhat like brown; tending toward brown
Example
The old paper had a brownish tint from age.
B2 noun /braʊ/

brow

Meaning
the part of the face above the eyes; forehead
Example
She wiped the sweat from her brow.
B1 noun /ˈbles.ɪŋ/

Blessing

Meaning
a beneficial thing for which one is grateful; divine favor
Example
Having good health is a blessing that we should cherish.
B1 noun /ˈbed ʃiːt/

Bed sheet

Meaning
a large rectangular piece of cloth used as bedding to lie on or under
Example
The clean white bed sheet felt soft against her skin.
C2 adjective /ˈbɛlɪˌkoʊs/

bellicose

Meaning
Showing a tendency to argue or fight; aggressive.
Example
His bellicose attitude often got him into unnecessary conflicts.
C2 noun /ˈbræɡərt/

braggart

Meaning
a person who boasts about achievements or possessions
Example
No one liked him because he was such a braggart.
A1 noun /bed/

Bed

Meaning
a piece of furniture for sleep or rest, typically a framework with a mattress
Example
She made her bed every morning before going to work.
C2 adjective /bɪˈfʌdld/

befuddled

Meaning
confused, unable to think clearly
Example
He looked befuddled after hearing the complex instructions.
C1 noun /brɒŋˈkaɪtɪs/

bronchitis

Meaning
inflammation of the lining of the bronchial tubes, which carry air to and from the lungs
Example
The doctor diagnosed him with acute bronchitis.
C2 noun /ˈbreɪziər/

Brazier

Meaning
a worker in brass; a portable container for burning charcoal or coal
Example
The brazier crafted beautiful brass ornaments.
C1 adjective /ˌbaɪˈlæt.ər.əl/

bilateral

Meaning
An agreement or relationship between two parties that is mutual, two-sided, or reciprocal.
Example
The two countries signed a bilateral trade agreement.
C1 noun /bəˈnæn.zə/

Bonanza

Meaning
a situation or event that creates a sudden increase in wealth, good fortune, or profits
Example
The oil discovery was a bonanza for the small country.
B2 noun ˈbaɪ.əs

bias

Meaning
Prejudice in favor of or against one thing, person, or group compared with another, usually in a way considered to be unfair.
Example
The judge must remain free from bias.
C1 noun /ˈbenɪˌfæktər/

Benefactor

Meaning
a person who gives money or other help to support a person or cause; a patron
Example
The anonymous benefactor donated millions to the hospital.
B2 noun /ˈbæk.boʊn/

Backbone

Meaning
the series of vertebrae extending from the skull to the pelvis; spine
Example
He injured his backbone in the accident.
A1 adjective /ˈbɪɡɪst/

biggest

Meaning
largest in size, amount, degree, or importance; superlative form of big
Example
This is the biggest challenge we have ever faced.
B1 noun /ˈbɪldər/

builder

Meaning
a person or company that constructs buildings or other structures
Example
The builder checked the site before starting the construction.
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 verb/noun /buː/

boo

Meaning
To show disapproval by shouting 'boo'; or a sound made to surprise or scare.
Example
The audience began to boo the bad performance.
B1 noun /ˈbluː.ber.i/

Blueberry

Meaning
a small round blue fruit that grows on bushes
Example
She picked fresh blueberries for the pie.
C1 adjective /bəˈnɑːl/ or /ˈbeɪnəl/

banal

Meaning
Lacking originality; boringly obvious and commonplace.
Example
His speech was full of banal clichés.
A1 adjective /braʊn/

Brown

Meaning
having the color of earth or wood; dark colored
Example
She has beautiful brown eyes that sparkle in the sunlight.
B1 adjective /bɔɪld/

Boiled

Meaning
cooked in boiling water
Example
She served boiled eggs for breakfast.
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 verb /bet/

bet

Meaning
to risk money on the outcome of something; to be confident
Example
I bet it will rain tomorrow.
C1 verb /bɪˈstoʊ/

bestow

Meaning
To give or present something as a gift or honor.
Example
The king bestowed honors upon the brave soldiers.
C2 noun /bɑːrd/

bard

Meaning
a poet, traditionally one reciting epics and associated with oral traditions
Example
Shakespeare is often called the Bard of Avon.
C2 verb /ˈbæstərdaɪz/

bastardize

Meaning
to corrupt or debase something by altering it from its original form; to change in a way that reduces quality or purity
Example
Critics argue that the remake bastardized the original novel.
C1 adjective /ˈbaʊn.tɪ.fəl/

bountiful

Meaning
Large in quantity; abundant; generous in giving.
Example
The farmer was grateful for the bountiful harvest.
C2 verb /biˈætɪfaɪ/

beatify

Meaning
to make blessed or holy, especially in the Roman Catholic Church, to declare a deceased person to be among the blessed
Example
The pope decided to beatify the martyr for his faith and sacrifice.
C1 noun /bɒɡ/

bog

Meaning
an area of wet, spongy ground; a swamp or marsh
Example
The hikers got stuck in a bog.
C1 noun /ˈbærɪˌtoʊn/

baritone

Meaning
a male singing voice between tenor and bass
Example
The singer’s baritone voice impressed the audience.
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 verb, noun /ˈbreɪnˌwɒʃ/

brainwash

Meaning
to manipulate someone into adopting certain beliefs by repeated pressure or propaganda; the act or process of such manipulation
Example
The group tried to brainwash new members with constant propaganda.
C2 verb /boʊd/

bode

Meaning
to be an omen of a particular outcome, often something bad
Example
The dark clouds bode a heavy storm.
A1 noun /bʌs/

Bus

Meaning
a large motor vehicle carrying passengers by road
Example
I take the bus to work every morning.
C2 noun /brɔːn/

brawn

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

barograph

Meaning
an instrument that records changes in atmospheric pressure
Example
The scientist checked the barograph for pressure variations.
A2 noun /bɔːrd/

board

Meaning
a flat, thin, rectangular piece of material such as wood; also a group of people managing an organization
Example
The board decided to increase the budget.
B1 noun /bʌlb/

bulb

Meaning
a rounded glass part of an electric lamp that produces light when lit; also an underground storage organ in some plants
Example
The light bulb burned out, so she replaced it with a new one.
C2 verb /bɪlk/

bilk

Meaning
To cheat or defraud someone of money or rights.
Example
The scammer tried to bilk elderly people out of their savings.
B1 noun /bloʊ/

Blow

Meaning
a powerful stroke with a hand, weapon, or hard object
Example
The boxer delivered a devastating blow to his opponent.
C2 noun /ˈbʌt.ər fɪʃ/

Butter-fish

Meaning
a small, smooth-skinned marine fish
Example
The butter-fish is popular in Bengali cuisine.
B1 verb /baʊns/

bounce

Meaning
to spring back after hitting something; to rebound.
Example
The ball bounced off the wall and hit the window.
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.
C2 noun /ˈbɛvi/

bevy

Meaning
A large group of people or things of a particular kind.
Example
A bevy of swans floated on the lake.
C1 adjective /ˈboʊɡəs/

bogus

Meaning
false, fake, or not genuine
Example
The police arrested him for using a bogus ID card.
C1 noun /beɪl/

bail

Meaning
the temporary release of an accused person awaiting trial, often with a financial guarantee
Example
He was granted bail after his arrest.
C1 adjective /bɪˈfɪt.ɪŋ/

Befitting

Meaning
appropriate; suitable; proper for a particular situation or person
Example
He wore formal attire befitting the important occasion.
A2 noun /ˈbraʊzər/

browser

Meaning
a software application for accessing information on the World Wide Web.
Example
I use a web browser to search for information online.
C2 noun /ˌbenɪˈdɪkʃən/

Benediction

Meaning
a blessing, especially a ceremonial one; an expression of good wishes
Example
The priest gave his benediction to the newlyweds.
C2 verb /breɪz/

braze

Meaning
To join two pieces of metal by heating and melting a filler metal into the joint.
Example
The mechanic brazed the broken pipe to fix the leak.
C2 noun /ˈbɛlfri/

belfry

Meaning
A bell tower, especially one attached to a church or building.
Example
The church belfry housed a large bronze bell.
C1 verb /brɔɪl/

broil

Meaning
To cook food by direct heat, usually under a grill or over a fire.
Example
She broiled the chicken until it was golden brown.
C2 adjective /blɑːˈzeɪ/

blase

Meaning
unimpressed or indifferent to something because it has been experienced so often before
Example
After years of luxury travel, she felt blase about another trip to Paris.
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 adjective /ˈbʊkɪʃ/

Bookish

Meaning
studious; scholarly; devoted to reading and studying
Example
She was known for her bookish nature and love of literature.
C1 verb /bɪˈriːv/

bereave

Meaning
to deprive someone of a loved one through death
Example
She was bereaved of her husband last year.
C2 verb /ˈbɜːrdʒən/

burgeon

Meaning
To grow or develop rapidly; to flourish.
Example
The city's population began to burgeon after the new factory opened.
A1 noun /ˈbɛdruːm/

bedroom

Meaning
A room used for sleeping in.
Example
The children were playing in the bedroom.
B1 noun /ˈboʊ.nəs/

Bonus

Meaning
an amount of money added to wages on a seasonal basis, especially as a reward for good performance
Example
She received a year-end bonus for her excellent work performance.