beyond a reasonable doubt
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idiom

beyond a reasonable doubt

Meaning
without any logical reason to doubt; with full certainty
Example
The evidence proved his guilt **beyond a reasonable doubt**.
idiom

Burning question

Meaning
An important or urgent question that people are eager to know.
Example
The **burning question** is whether the plan will actually work.
idiom

beginner’s luck

Meaning
success for someone inexperienced
Example
He won his first game — must be **beginner’s luck**.
idiom

build castles in the air

Meaning
to make unrealistic plans or dreams
Example
He’s always **building castles in the air** instead of acting.
idiom

blow out of the water

Meaning
to surprise or defeat completely
Example
Their performance **blew us out of the water**.
idiom

bottom line

Meaning
the most important point; the final result or profit
Example
The **bottom line** is that trade deficits are increasing.
idiom

build a better mousetrap

Meaning
to improve an existing product or idea
Example
Every tech company tries to **build a better mousetrap** in its field.
idiom

back off

Meaning
to move away or stop pressuring someone
Example
Let’s **back off** and give them space to decide.
idiom

be a good sport

Meaning
to be fair and positive in difficult situations
Example
Even when she lost the game, she was **a good sport** and congratulated the winner.
idiom

bite the bullet

Meaning
to decide to do something difficult or unpleasant that one has been putting off or hesitating about
Example
I decided to **bite the bullet** and finish my homework.
idiom

Bailout package

Meaning
Financial support given to prevent a company or economy from collapsing.
Example
The government announced a **bailout package** for struggling airlines.
idiom

Build bridges, not walls

Meaning
Make connections and friendships rather than creating barriers
Example
Instead of fighting, let's **build bridges, not walls**.
idiom

blood is thicker than water

Meaning
family relationships are stronger than others
Example
He helped his brother because **blood is thicker than water**.
idiom

bear the responsibility

Meaning
to take on the duty of something
Example
She was willing to **bear the responsibility** for the new project.
idiom

bad luck

Meaning
unfortunate or unlucky situation
Example
It’s just **bad luck** that it rained on our picnic day.
idiom

backdoor entry

Meaning
a secret or unofficial way to access something
Example
Hackers found a **backdoor entry** into the company’s database.
idiom

bootstrapping

Meaning
building a business without external funding
Example
He started his company through **bootstrapping**, using only his savings.
idiom

break the ice

Meaning
to start a friendly conversation in an awkward situation
Example
To **break the ice**, I told a funny story.
idiom

be on edge

Meaning
to be nervous, tense, or easily upset
Example
She’s been **on edge** all day waiting for the results.
idiom

bubbling with joy

Meaning
very happy and excited
Example
The children were **bubbling with joy** after receiving their gifts.
idiom

Break bread with someone

Meaning
To share a meal; to bond over food
Example
They decided to **break bread** to celebrate their new partnership.
idiom

burn your fingers

Meaning
to suffer because of a bad decision or mistake
Example
He **burned his fingers** by trusting the wrong person.
idiom

birds of a feather flock together

Meaning
People who have similar interests or personalities tend to be friends.
Example
John and Mike are always together; well, **birds of a feather flock together**.
idiom

Baptism of fire

Meaning
A person’s first difficult experience in a new job or role.
Example
Her first week as manager was a real **baptism of fire**.
idiom

back to square one

Meaning
to start over again
Example
After the computer crashed, I had to go **back to square one** with my report.
idiom

beat the clock

Meaning
to finish something before the deadline
Example
We managed to **beat the clock** and submit the report early.
idiom

blind date

Meaning
a romantic meeting between two people who have never met before
Example
She met her boyfriend on a **blind date**.
idiom

backpropagation

Meaning
a learning algorithm used in neural networks to minimize error by adjusting weights through the network
Example
The **backpropagation** algorithm helps in optimizing the neural network's performance.
idiom

beta test

Meaning
to test a product before official release
Example
We are going to **beta test** our app next week.
idiom

brighten someone's day

Meaning
to make someone feel happier
Example
Her kindness really **brightened my day**.
idiom

beat the rap

Meaning
to escape punishment or avoid being convicted
Example
He managed to **beat the rap** thanks to a clever lawyer.
idiom

black and blue

Meaning
bruised; having marks from injury
Example
He was **black and blue** after falling off his bike.
idiom

black box thinking

Meaning
analyzing unknown processes by studying their inputs and outputs
Example
In AI research, **black box thinking** helps improve transparency.
idiom

build trust

Meaning
to create or develop trust in a relationship
Example
It takes time to **build trust** with new people.
idiom

backseat driver

Meaning
a person who gives unwanted advice or direction
Example
Don't be a **backseat driver**, let me handle it.
idiom

back to the drawing board

Meaning
to start over again after a failure
Example
Our proposal was rejected, so it's **back to the drawing board**.
idiom

book smart

Meaning
knowledgeable from studying rather than experience
Example
He’s **book smart** but lacks practical experience.
idiom

bear market

Meaning
a period when stock prices are falling
Example
Many people lose money during a **bear market**.
idiom

big thanks

Meaning
an informal way to say thank you very much
Example
**Big thanks** to everyone who supported the project.
idiom

be at your wits' end

Meaning
to be so worried or upset that you don't know what to do
Example
I'm **at my wits' end** trying to calm the kids down.
idiom

butter someone up

Meaning
to flatter someone to gain favor
Example
He’s trying to **butter up** the boss for a promotion.
idiom

butterflies in your stomach

Meaning
feeling nervous or anxious
Example
I always get **butterflies in my stomach** before a big presentation.
idiom

button up

Meaning
to finish preparations or close something securely
Example
Let’s **button up** the proposal by Friday.
idiom

bolt from the blue

Meaning
a sudden and unexpected event
Example
The project cancellation came as a **bolt from the blue**.
idiom

bring the curtain down

Meaning
to end something; to finish a performance or event
Example
The concert **brought the curtain down** on the music festival.
idiom

bring up a family

Meaning
to raise and take care of children
Example
They worked hard to **bring up a family**.
idiom

breathe in

Meaning
to inhale air deeply
Example
Take a moment to **breathe in** before you speak.
idiom

black sheep of the family

Meaning
a family member who is considered a disgrace
Example
He became the **black sheep of the family** after his bad decisions.
idiom

beyond words

Meaning
too great or extreme to be described in words
Example
Her kindness was **beyond words**.
idiom

bear with

Meaning
to be patient with someone or something
Example
Please **bear with** us while we resolve the issue.
idiom

believe you can

Meaning
to have the mindset that you are capable of doing something
Example
If you **believe you can**, you’re halfway there.
idiom

busy as a bee

Meaning
very active or hardworking
Example
She’s **as busy as a bee** preparing for the wedding.
idiom

balance the books

Meaning
to make sure income and expenses are equal
Example
The accountant worked late to **balance the books**.
idiom

bat around

Meaning
to discuss ideas casually
Example
We spent the afternoon **batting around** marketing themes.
idiom

be thick as thieves

Meaning
to be very close friends
Example
Those two have been **thick as thieves** since childhood.
idiom

bottom out

Meaning
to reach the lowest point before improving
Example
Experts believe the market has **bottomed out**.
idiom

blackout

Meaning
to lose consciousness temporarily
Example
He suddenly **blacked out** during the match.
idiom

bag of bones

Meaning
a very thin person
Example
After his illness, he turned into a **bag of bones**.
idiom

break one's word

Meaning
to fail to keep a promise
Example
Don’t **break your word**; people rely on you.
idiom

back on one’s feet

Meaning
to recover and be healthy again
Example
After a few days of rest, he’s finally **back on his feet**.
idiom

black sheep

Meaning
a person who is considered a disgrace to a group or family
Example
He is the **black sheep** of the family.
idiom

buckle down

Meaning
to start working seriously
Example
If you want to pass the exam, you’d better **buckle down** and study.
idiom

bookworm

Meaning
a person who loves reading
Example
He’s such a **bookworm**; he spends all his free time in the library.
idiom

block out

Meaning
to ignore distractions or unpleasant thoughts
Example
She tried to **block out** the noise and continue working.
idiom

break out in a cold sweat

Meaning
to suddenly start sweating due to fear or anxiety
Example
He **broke out in a cold sweat** before his job interview.
idiom

Bootstrap the business

Meaning
To build a company using only personal finances.
Example
They decided to **bootstrap the business** instead of seeking investors.
idiom

burn the midnight oil

Meaning
to work late into the night
Example
She **burned the midnight oil** to finish her project.
idiom

big data

Meaning
Extremely large data sets that may be analyzed computationally to reveal patterns, trends, and associations.
Example
The company uses **big data** to improve customer experience.
idiom

branch off

Meaning
to separate from a main route or line of development
Example
The hiking path will **branch off** near the lake.
idiom

beyond one’s grasp

Meaning
too difficult to understand or achieve
Example
Quantum physics is **beyond my grasp** right now.
idiom

Be all ears

Meaning
To listen very attentively.
Example
I’m **all ears**, tell me what happened!
idiom

burning desire

Meaning
a strong motivation to achieve something
Example
He has a **burning desire** to succeed in life.
idiom

black and white

Meaning
clearly defined; without confusion or ambiguity
Example
The contract terms are **black and white**.
idiom

brush up on

Meaning
to improve one’s skill or knowledge
Example
She decided to **brush up on** her painting techniques.
idiom

burst with joy

Meaning
to be so happy that it’s hard to contain emotions
Example
The parents **burst with joy** when their child won the prize.
idiom

Break with tradition

Meaning
To do something in a different way from what is usually done
Example
The couple decided to **break with tradition** and have a small wedding on the beach.
idiom

bury the lead

Meaning
to hide the most important part of the story
Example
Don’t **bury the lead**—mention the main point first.
idiom

break down

Meaning
to start crying due to strong emotions
Example
She **broke down** when she heard the sad news.
idiom

bend the truth

Meaning
to slightly change the truth to make something sound better
Example
He tends to **bend the truth** when telling stories.
idiom

burn a hole in one's pocket

Meaning
to spend money quickly or irresponsibly
Example
After receiving his bonus, he couldn't resist and **burned a hole in his pocket** by buying a new car.
idiom

believe you’re good enough

Meaning
to accept that you are capable and worthy
Example
To overcome fear, you must **believe you’re good enough**.
idiom

break the deadlock

Meaning
to end a situation in which progress is not possible
Example
They finally managed to **break the deadlock** through discussion.
idiom

beyond one’s comprehension

Meaning
too difficult to understand
Example
Quantum physics is **beyond my comprehension**.
idiom

buy a lemon

Meaning
to buy something that is defective or worthless
Example
He **bought a lemon** when he got that used car.
idiom

bury your head in the sand

Meaning
to ignore a problem hoping it will go away
Example
We can’t **bury our heads in the sand** about climate change any longer.
idiom

bail out

Meaning
to release someone from jail after paying bail money
Example
His family managed to **bail him out** after two days.
idiom

beyond the scope

Meaning
outside the planned or expected area of focus
Example
The new feature was beyond the scope of the original project but added great value.
idiom

broken-hearted

Meaning
extremely sad about something or someone
Example
He was **broken-hearted** after the breakup.
idiom

Band together

Meaning
To unite for a common purpose.
Example
The workers **banded together** to demand better wages.
idiom

brush past

Meaning
to move quickly by someone or something with slight contact
Example
He **brushed past** the reporters without stopping.
idiom

brighten up

Meaning
to become happier or more cheerful
Example
Her face **brightened up** when she saw her friends.
idiom

beg to differ

Meaning
to politely disagree with someone
Example
I **beg to differ**, but I think your conclusion is incorrect.
idiom

big-hearted

Meaning
very kind and generous
Example
He is known as a **big-hearted** man.
idiom

bring down

Meaning
to make someone feel sad or to reduce something
Example
Don’t let one rude comment **bring down** your confidence.
idiom

be on duty

Meaning
to be working or responsible for something at a certain time
Example
The guard was **on duty** all night.
idiom

break into a market

Meaning
to successfully enter a new market or industry
Example
The company is trying to **break into the Asian market**.
idiom

blow out of proportion

Meaning
to exaggerate or overstate something
Example
The media **blew the story out of proportion**.
idiom

buckle under the strain

Meaning
to give in to stress or pressure
Example
She refused to **buckle under the strain** and kept going.
idiom

backdoor

Meaning
An undocumented way of accessing a system or software, usually used by hackers to bypass security.
Example
The attacker installed a **backdoor** to access the system at any time without being detected.
idiom

Burn rate

Meaning
The rate at which a startup spends its capital.
Example
Our **burn rate** is too high; we need to cut costs.
idiom

blow off steam

Meaning
to express anger or frustration so that you feel better
Example
He went for a run to **blow off steam** after the argument.
idiom

bring down the house

Meaning
to get an enthusiastic applause from the audience
Example
Her solo performance **brought down the house**.
idiom

backroom deal

Meaning
a secret agreement made by powerful people
Example
The media exposed the **backroom deal** between the two parties.
idiom

branch out

Meaning
to expand into new activities or areas
Example
The bakery plans to **branch out** into catering services next year.
idiom

Building castles in the air

Meaning
To have unrealistic or impractical plans or dreams.
Example
She’s always **building castles in the air**, dreaming of a perfect world.
idiom

bloom where you’re planted

Meaning
make the best of your current situation
Example
Even in tough times, she **blooms where she’s planted**.
idiom

Born with a silver spoon in one's mouth

Meaning
To be born into a wealthy family.
Example
He never had to struggle; he was **born with a silver spoon in his mouth**.
idiom

balance of power

Meaning
the distribution of power between nations to prevent any one nation from becoming too powerful
Example
The United Nations aims to maintain the **balance of power** among its member states.
idiom

behind bars

Meaning
in prison
Example
The murderer will spend the rest of his life **behind bars**.
idiom

blow someone away

Meaning
to impress or surprise someone greatly
Example
Her performance really **blew me away**.
idiom

back each other up

Meaning
to support and help one another
Example
In a good team, members always **back each other up**.
idiom

blue chip company

Meaning
a large, reliable, and financially stable company
Example
Investors prefer to put their money into **blue chip companies**.
idiom

build brand loyalty

Meaning
to create long-term trust and attachment to a brand
Example
Consistent quality helps **build brand loyalty** among customers.
idiom

break down the problem

Meaning
to analyze a problem step by step
Example
Let’s **break down the problem** to understand it better.
idiom

balance of trade

Meaning
the difference between a country's exports and imports
Example
A negative **balance of trade** can weaken a nation's currency.
idiom

Break the news

Meaning
To tell someone important or bad news.
Example
He didn’t know how to **break the news** to his parents.
idiom

bargain chip

Meaning
something of value used in negotiations to get a better deal
Example
His offer of a longer contract was a strong **bargain chip**.
idiom

black box problem

Meaning
a situation where the internal workings of an AI system are not transparent or understood
Example
The biggest challenge in deep learning is the **black box problem**.
idiom

beyond reasonable doubt

Meaning
without any logical uncertainty
Example
The jury found him guilty **beyond reasonable doubt**.
idiom

brainstorm

Meaning
to generate many creative ideas in a group discussion
Example
Let’s **brainstorm** some ideas for our next campaign.
idiom

breach of trust

Meaning
a failure to keep information or promises secure
Example
Leaking user data is a major **breach of trust**.