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A2 noun /ˈbɪljən/

billion

Meaning
the number 1,000,000,000 (one thousand million)
Example
The company is worth more than a billion dollars.
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.
A2 adverb /ˈbæk.wərdz/

Backwards

Meaning
in the direction that is behind; in reverse order
Example
He counted backwards from ten to one.
C2 noun /ˈbiː.təl nʌt/

Betel-nut

Meaning
seed of the areca palm tree, often chewed as a stimulant
Example
Betel-nut is commonly chewed in many South Asian countries.
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 /ˈbɑːrbərɪzəm/

Barbarism

Meaning
extreme cruelty or brutality; absence of culture and civilization
Example
The barbarism of the war crimes shocked the entire international community.
C2 noun /ˌbɪbliəʊˈmeɪniə/

bibliomania

Meaning
An extreme obsession with collecting or possessing books.
Example
His bibliomania led him to fill every room with books.
B2 interjection /ˈbrɑː.voʊ/

bravo

Meaning
used to express approval, admiration, or praise
Example
The audience shouted 'Bravo!' after the stunning performance.
A1 adjective, adverb, verb /ˈbɛtər/

better

Meaning
of a more excellent or effective type or quality; to surpass or improve
Example
He felt better after taking the medicine.
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.
B1 verb /ˈbɑrɡɪn/

bargain

Meaning
to negotiate terms; to discuss prices; to make a deal
Example
She likes to bargain at the local market.
C2 verb /bruːt/

bruit

Meaning
to spread a rumor or report widely
Example
The scandal was quickly bruited about the town.
C2 noun /ˈbræɡərt/

braggart

Meaning
a person who boasts about achievements or possessions
Example
No one liked him because he was such a braggart.
C1 adjective /ˈbɔɪstərəs/

boisterous

Meaning
noisy, energetic, and cheerful; rowdy
Example
The children were boisterous during the birthday party.
B2 adjective /beər/

Bare

Meaning
naked; uncovered; empty; minimal
Example
The bare walls of the room needed some decoration.
B1 noun /ˈbaɪbəl/

bible

Meaning
the Christian scriptures consisting of the Old and New Testaments; also used for any authoritative book
Example
She reads the Bible every morning.
C2 verb /bɪˈfɒɡ/

befog

Meaning
to confuse or make unclear; to cover with fog or mist
Example
His mind was befogged by exhaustion.
A1 verb /bɪˈɡɪn/

begin

Meaning
to start doing something; to commence
Example
I will begin my studies tomorrow.
B1 noun /broʊˈʃʊr/

brochure

Meaning
a small booklet or pamphlet containing information or advertising
Example
The travel agent gave us a brochure about the holiday package.
C2 verb /bɪˈdræɡəl/

bedraggle

Meaning
to make something wet, dirty, and untidy by dragging it through mud or water
Example
The children came home bedraggled after playing in the rain.
C2 noun /bɛk/

beck

Meaning
a gesture of beckoning; a small stream or brook (chiefly Northern English)
Example
The servant came at his master's beck and call.
B2 adverb /ˈbruːtəli/

brutally

Meaning
in a cruel, violent, or harsh manner; in a very direct and blunt way
Example
The prisoners were treated brutally by the guards.
C2 noun /ˈbrɪmˌstoʊn/

brimstone

Meaning
Sulfur, especially when considered as fiery and associated with hell or divine punishment.
Example
The preacher spoke of fire and brimstone to warn the congregation.
C2 noun /ˌbɒmbərˈdɪər/

bombardier

Meaning
a member of a bomber crew responsible for releasing bombs
Example
The bombardier released the bombs with precision.
C1 verb /bɪˈlɪtl/

belittle

Meaning
To make someone or something seem less important or less valuable.
Example
He often belittled his coworkers to feel superior.
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.
C2 noun /briːtʃ/

breech

Meaning
The back part of a gun barrel; a position of a baby in the womb where the buttocks or feet come out first at birth.
Example
The rifle was loaded through the breech.
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.
A1 noun /ˈbɪldɪŋ/

building

Meaning
A structure with a roof and walls, such as a house, school, or office.
Example
The old building was renovated into a museum.
C1 noun /ˈblʌd.ʃed/

Bloodshed

Meaning
the killing or wounding of people, typically in large numbers during a conflict
Example
The peace treaty was signed to prevent further bloodshed.
A1 noun /breɪk/

break

Meaning
A pause in work or during an activity or event.
Example
Short breaks refresh your mind.
C2 noun /ˈbuːt.leɪs/

Boot-lace

Meaning
a cord or string used to fasten a boot or shoe
Example
I need to tie my boot-lace before going for a walk.
C2 verb /bɪˈfaʊl/

befoul

Meaning
to make dirty or polluted; to disgrace or corrupt
Example
The factory waste befouled the river.
C2 adjective /bɪˈsɒtɪd/

besotted

Meaning
strongly infatuated or obsessed with someone or something
Example
He was completely besotted with her charm.
B2 noun /ˈbækɪŋ/

Backing

Meaning
help or support; financial or material support
Example
The project received backing from several major investors.
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.
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.
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.
C2 verb /ˈbækbaɪt/

backbite

Meaning
to speak negatively about someone who is not present; to slander behind someone’s back
Example
It is wrong to backbite your colleagues behind their backs.
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.
C1 adjective /ˈbɑːmi/

balmy

Meaning
Mild and pleasantly warm; soothing.
Example
We enjoyed a walk on a balmy summer evening.
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.
C2 noun /brəˈvjʊrə/

bravura

Meaning
a display of great skill and brilliance, especially in music or performance
Example
The pianist delivered a bravura performance that left the audience spellbound.
C1 noun /ˈbjuːɡəl/

Bugle

Meaning
a brass musical instrument similar to a trumpet but without valves, used especially for military calls
Example
The soldier played the bugle to signal the start of the ceremony.
B2 noun/verb /bʌst/

bust

Meaning
As a noun: A sculpture of a person's head, shoulders, and chest; As a verb: To break, smash, or arrest.
Example
The police busted the gang last night.
C1 verb /ˈbʌŋɡəl/

bungle

Meaning
To carry out a task clumsily or incompetently.
Example
He bungled the presentation and confused the audience.
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.
A1 noun /bʌs/

Bus

Meaning
a large motor vehicle carrying passengers by road
Example
I take the bus to work every morning.
B2 verb /ˈbrɪdʒɪŋ/

bridging

Meaning
The action of building a bridge over something; connecting or reducing the distance between two things.
Example
The new initiative is bridging the gap between urban and rural development.
B2 noun /bʌlk/

Bulk

Meaning
the mass or size of something large; the greater part or majority of something
Example
The bulk of the work was completed before the deadline.
B2 noun, verb /blæst/

blast

Meaning
a strong gust of wind, an explosion, or a loud sound; to destroy or shatter by explosion
Example
The explosion sent a powerful blast through the building.
B2 noun /ˈbrɛkdaʊn/

breakdown

Meaning
a failure or collapse of a system or machinery
Example
The car had a breakdown on the highway.
C2 adverb /ˈbruːskli/ or /ˈbrʌskli/

brusquely

Meaning
in a blunt, abrupt, or rude manner
Example
She brusquely dismissed the suggestion.
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.
A2 noun /ˈbʌt.ər.flaɪ/

Butter-fly

Meaning
a flying insect with large colorful wings
Example
The beautiful butterfly landed on the flower.
C2 noun /broʊɡ/

brogue

Meaning
A strong outdoor shoe; also a marked accent, especially Irish or Scottish.
Example
He bought a pair of stylish brogues for the wedding.
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.
A2 noun /ˈblæŋ.kɪt/

Blanket

Meaning
a large piece of woolen or similar material used as a covering for warmth
Example
She wrapped herself in a warm blanket on the cold night.
A2 phrasal verb /bæk ʌp/

back up

Meaning
to support or help someone; to make a copy of data for safety; to move backward
Example
Please back up your files before updating the system.
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.
C1 noun /ˈbɜːrθraɪt/

birthright

Meaning
A privilege or possession that a person has from birth.
Example
Freedom is considered a birthright of every individual.
B2 adverb /ˈbrɔːdli/

broadly

Meaning
in a general or wide manner.
Example
The rules are broadly similar across all regions.
C2 noun /ˈbeɪleɪ/

Bele

Meaning
a type of freshwater fish found in South Asian rivers, known for its distinctive appearance
Example
The bele fish is commonly caught in the rivers of Bangladesh.
C2 verb /bɪˈdɔːb/

bedaub

Meaning
to smear or cover with a sticky or dirty substance
Example
The children bedaubed the wall with paint.
A2 noun /ˈbʊkɪŋ/

booking

Meaning
the act of reserving accommodations, tickets, etc.
Example
I made a booking for a hotel room in advance.
A2 noun, verb /bɑːr/

bar

Meaning
a counter where drinks are served; to prevent or block
Example
They decided to meet at the bar after work.
C2 noun /ˈbed.ləm/

Bedlam

Meaning
a scene of noisy confusion; chaos and disorder
Example
The classroom was complete bedlam after the fire alarm.
C1 adjective /ˈbrɪslɪŋ/

bristling

Meaning
full of energy, anger, or excitement; showing bristles standing up
Example
He entered the room bristling with confidence.
A2 noun/verb /ˈbætəl/

battle

Meaning
A fight between armed forces or a struggle to achieve or resist something.
Example
The soldiers prepared for the final battle.
B2 noun /buˈkeɪ/

Bouquet

Meaning
an attractively arranged bunch of flowers, especially one presented as a gift or carried at a ceremony
Example
The bride carried a beautiful bouquet of white roses down the aisle.
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.
C2 verb /ˈbɪloʊ/

billow

Meaning
To swell or rise in large waves or surges; to flow outward in a rolling motion.
Example
Smoke billowed from the burning building.
B1 noun ˈbæriə(r)

barrier

Meaning
A fence or other obstacle that prevents movement or access.
Example
The barrier prevented entry.
B2 noun /ˈbʌf.ə.loʊ/

Buffalo

Meaning
a large wild ox with heavy horns; American bison
Example
The buffalo grazed peacefully in the meadow.
B1 noun, verb /ˈbʊli/

bully

Meaning
A person who habitually seeks to harm or intimidate those weaker; to intimidate or mistreat someone weaker.
Example
The teacher stopped the older boy from trying to bully his classmates.
B2 adjective /ˈbleɪzɪŋ/

Blazing

Meaning
burning fiercely; extremely hot; very bright
Example
The blazing sun made the day extremely hot.
C1 noun /bɪˈriːvmənt/

bereavement

Meaning
The state of having lost a loved one through death.
Example
She received many letters of sympathy during her time of bereavement.
A2 noun /ˈbʌk.ɪt/

Bucket

Meaning
a roughly cylindrical open container with a handle, used to hold and carry liquids
Example
The farmer filled the bucket with fresh water from the well.
A2 noun /bɪɡ boʊl/

Big bowl

Meaning
a large, round, shallow container used for serving food, mixing ingredients, or washing
Example
She mixed the ingredients in a big bowl.
C1 verb /bæsk/

bask

Meaning
to lie in warmth and light; to enjoy something pleasurable
Example
The cat basks in the sunny window.
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.
B2 noun /ˈbækˌsaɪd/

backside

Meaning
the rear part or surface of something; informal term for the buttocks
Example
The kids slid down the hill on their backside.
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 noun /bəˈfuːnəri/

buffoonery

Meaning
Foolish or ridiculous behavior intended to amuse.
Example
His constant buffoonery irritated the serious audience.
A2 verb /bɪˈlɒŋ/

belong

Meaning
to be in the right place or to be a member of a group
Example
She felt she truly belonged to the team.
C1 adjective /ˈbɔɪənt/ or /ˈbuːjənt/

buoyant

Meaning
Able to float easily; cheerful and optimistic.
Example
She remained buoyant despite the difficulties.
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.
B1 adverb /ˈbreɪv.li/

Bravely

Meaning
in a way that shows courage and determination
Example
The firefighter bravely entered the burning building.
C2 noun /ˈbrɛviˌɛri/

breviary

Meaning
A book containing the service for each day, used in Christian liturgy.
Example
The monk read from the breviary during morning prayers.
C2 noun /ˈbrɒŋkəs/

bronchus

Meaning
either of the two main branches of the trachea that lead directly into the lungs
Example
The left bronchus carries air into the left lung.
C1 verb /ˈbæfəl/

baffle

Meaning
to confuse; to be too difficult to understand
Example
The math problem baffles me completely.
B2 verb /blɪŋk/

blink

Meaning
to close and open the eyes quickly.
Example
She blinked rapidly to clear the dust from her eyes.
C1 noun /ˈbærɪˌtoʊn/

baritone

Meaning
a male singing voice between tenor and bass
Example
The singer’s baritone voice impressed the audience.
C2 noun /biˈætɪtjuːd/

beatitude

Meaning
supreme blessedness or happiness, often used in reference to the sayings of Jesus in the Sermon on the Mount
Example
She felt a state of beatitude after receiving the good news.
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.
B2 adjective /bɪˈlʌvɪd/

beloved

Meaning
dearly loved, highly regarded
Example
She was the beloved queen of the kingdom.
A1 verb /brɪŋ/

bring

Meaning
to carry or take something to a place; to come with something
Example
Please bring your books to class tomorrow.
C2 adjective /ˈblæs.fə.məs/

blasphemous

Meaning
showing disrespect or lack of reverence for God or sacred things
Example
The book was banned for its blasphemous content.
C2 noun /ˈbrɪk.bæt/

Brickbat

Meaning
a piece of brick, especially one used as a missile; harsh criticism or censure
Example
The angry protesters threw brickbats at the building windows.
B2 verb /buːm/

boom

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

bewail

Meaning
to express deep sorrow or regret over something; to mourn openly
Example
She bewailed the loss of her childhood home.
B2 noun /ˈbælət/

ballot

Meaning
a process of voting, usually in secret; the paper used to record a vote
Example
Voters cast their ballot in the election.
C1 adjective /bəˈlɪdʒ.ər.ənt/

belligerent

Meaning
Hostile and aggressive, ready to fight or argue.
Example
His belligerent attitude often leads to conflicts.
B1 noun /ˌbækˈjɑːrd/

backyard

Meaning
an area of land behind a house, typically used for recreation or gardening
Example
The children played football in the backyard.
C2 verb /bɪˈleɪt/

belate

Meaning
to delay or make late
Example
Heavy traffic belated our arrival at the party.
B2 noun /buːˈtiːk/

boutique

Meaning
a small shop that sells fashionable clothes or accessories
Example
She bought a beautiful dress from a boutique downtown.
B1 adjective /ˈbrɪliənt/

brilliant

Meaning
Exceptionally clever, talented, or impressive; very bright or radiant.
Example
She gave a brilliant performance on stage.
B2 adjective /boʊld/

Bold

Meaning
brave; confident; daring
Example
He made a bold decision to start his own business.
C1 adjective /ˈbaɪtɪŋ/

Biting

Meaning
extremely cold; sharply critical or harsh
Example
The biting cold made everyone shiver.
C2 adjective /ˈbɪloʊɪŋ/

billowing

Meaning
Describing something that swells or surges outward in waves or large masses.
Example
She walked through the billowing curtains.
B1 noun /bʊk ˈsel.ər/

Book seller

Meaning
a person who sells books, especially as a business
Example
The book seller recommended a great novel for my summer reading.
B2 noun ˈbaɪ.əʊˌfjuː.əl

biofuel

Meaning
A fuel derived immediately from living matter, as opposed to fossil fuels derived from long-dead biological matter.
Example
Biofuels reduce dependence on conventional energy sources.
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 /bəˈsuːn/

bassoon

Meaning
a large woodwind instrument with a deep sound
Example
The orchestra featured a beautiful bassoon solo.
B1 phrase bɛst ˈɛf.ərt

best effort

Meaning
The maximum amount of effort or energy that someone can give.
Example
He gave his best effort to complete the task on time.
C1 noun /ˈbeɪsbɔːrd/

baseboard

Meaning
A narrow board running along the bottom of an interior wall, covering the joint between wall and floor.
Example
The carpenter painted the baseboard white.
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.
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.
C1 noun /bɒmˈbɑːrdmənt/

bombardment

Meaning
a continuous attack with bombs or other projectiles
Example
The city endured a heavy bombardment during the war.
B2 noun, verb /bəˈfeɪ/ (noun), /ˈbʌfɪt/ (verb)

buffet

Meaning
A meal where guests serve themselves from a variety of dishes arranged on a table; also means to strike repeatedly (as a verb).
Example
We enjoyed a large buffet at the wedding reception.
C2 noun /bɪsk/

bisque

Meaning
A rich, creamy soup made from shellfish.
Example
We ordered lobster bisque at the restaurant.