out of the blue
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idiom

out of the blue

Meaning
unexpectedly or without warning
Example
My old friend called me **out of the blue** after ten years.
idiom

once bitten, twice shy

Meaning
after an unpleasant experience, you are careful to avoid it happening again
Example
After losing money in the stock market, he became **once bitten, twice shy**.
idiom

on the grapevine

Meaning
to hear gossip or rumor indirectly
Example
I heard **on the grapevine** that they’re getting divorced.
phrasal-verb

open with

Meaning
to begin something by doing or saying something specific
Example
He **opened with** a personal story to connect with the audience.
phrasal-verb

open yourself up

Meaning
to make yourself emotionally vulnerable or honest
Example
It’s hard to **open yourself up** after being hurt.
idiom

out of balance

Meaning
to feel mentally or emotionally unstable
Example
Lack of rest can make you feel **out of balance**.
phrasal-verb

open access to opportunities

Meaning
to make education, jobs, or services available to more people
Example
Digital transformation helps **open access to opportunities** globally.
idiom

off the air

Meaning
no longer being broadcasted
Example
The show went **off the air** after ten years.
idiom

once in a blue moon

Meaning
very rarely
Example
I only see him **once in a blue moon**.
phrasal-verb

open toward

Meaning
to show warmth or acceptance toward someone
Example
He became more **open toward** his classmates.
idiom

open to abuse

Meaning
liable to be misused or exploited
Example
Facial recognition technology is **open to abuse** if not regulated.
idiom

out of the box

Meaning
creative and different from usual ideas
Example
Her **out of the box** marketing strategy increased sales rapidly.
idiom

offstage

Meaning
outside of public attention or in private life
Example
He is very different **offstage** than he appears in his shows.
idiom

on the stand

Meaning
testifying as a witness in court
Example
She was nervous when she was **on the stand**.
idiom

offbeat

Meaning
unusual; different from the norm
Example
His **offbeat** sense of humor makes everyone laugh.
idiom

open up

Meaning
to become willing to share thoughts or to start operating
Example
He finally **opened up** about the challenges he’s facing.
idiom

Out of one’s depth

Meaning
To be in a situation that is too difficult to understand or deal with.
Example
I felt **out of my depth** in that technical discussion.
idiom

on the line

Meaning
at risk; in danger of being lost
Example
The company’s reputation is **on the line** after the failed shipment.
idiom

outsmart the algorithm

Meaning
to beat or trick a system that uses AI or automation
Example
People try to **outsmart the algorithm** to boost their posts.
phrasal-verb

open up to diversity

Meaning
to become accepting and appreciative of different backgrounds or perspectives
Example
Education helps people **open up to diversity** and reduce prejudice.
idiom

over the moon

Meaning
extremely pleased or happy
Example
She was **over the moon** when she won the prize.
phrasal-verb

open yourself emotionally

Meaning
to allow yourself to feel and express emotions freely
Example
It's not easy to **open yourself emotionally** after being hurt.
idiom

on all fours

Meaning
crawling on hands and knees
Example
The baby moved **on all fours** across the floor.
idiom

off the beaten track

Meaning
in a place not visited by many people; remote or unusual
Example
We found a lovely beach **off the beaten track**.
idiom

One step at a time

Meaning
Handle tasks gradually and not all at once.
Example
Don't stress, just take **one step at a time**.
idiom

on background

Meaning
information given to a journalist that cannot be attributed to the source
Example
The official spoke **on background** about the new policy.
idiom

on one's shoulders

Meaning
having the responsibility or burden of something
Example
The success of the project is **on his shoulders**.
idiom

Out of the frying pan and into the fire

Meaning
Going from a bad situation to an even worse one.
Example
Quitting that job put him **out of the frying pan and into the fire**.
idiom

on the sly

Meaning
secretly; in a sneaky way
Example
He met her **on the sly** without telling anyone.
idiom

opt in

Meaning
to choose to participate
Example
Employees can **opt in** to the wellness program.
phrasal-verb

open up to challenges

Meaning
to be willing to face or accept difficult situations with confidence
Example
If you want to grow, you must **open up to challenges** instead of avoiding them.
idiom

on the cutting edge

Meaning
at the forefront of innovation or technology
Example
The laboratory is **on the cutting edge** of artificial intelligence research.
idiom

on air

Meaning
broadcasting live; being aired on television or radio
Example
The radio show will be **on air** from 7 to 9 PM.
idiom

old flame

Meaning
a person one had a romantic relationship with in the past
Example
He met his **old flame** at the reunion.
idiom

out of bounds

Meaning
not allowed or beyond acceptable limits
Example
His rude comment was **out of bounds**.
idiom

olive branch

Meaning
a gesture of peace or reconciliation
Example
The president extended an **olive branch** by inviting his rival to the summit.
idiom

on the rocks

Meaning
in trouble or likely to fail (especially a relationship or marriage)
Example
Their marriage is **on the rocks** after constant arguments.
idiom

off the wall

Meaning
unusual or unconventional
Example
His ideas are often **off the wall**, but they sometimes work.
phrasal-verb

open relations with

Meaning
to start official or friendly relations with another country
Example
After years of tension, the two countries agreed to **open relations with** each other.
phrasal-verb

open up emotionally

Meaning
to allow others to see your feelings or emotional state
Example
He started to **open up emotionally** after therapy.
idiom

outside the box

Meaning
thinking or acting in an unusual or unconventional way
Example
To solve this problem, we need to think **outside the box**.
idiom

Out of fashion

Meaning
No longer trendy or popular
Example
Those jeans went **out of fashion** years ago.
idiom

once in a while

Meaning
sometimes, but not very often
Example
I enjoy eating out **once in a while**, but I prefer home-cooked meals.
idiom

on the witness stand

Meaning
to be giving testimony in court
Example
The victim was nervous while **on the witness stand**.
idiom

on good terms with

Meaning
having a friendly and positive relationship with someone
Example
She’s **on good terms with** her ex-husband for the kids’ sake.
idiom

off the rails

Meaning
to become uncontrolled or chaotic
Example
After his friend moved away, his life went **off the rails**.
phrasal-verb

open onto

Meaning
to lead to a place or opportunity for connection
Example
This conversation could **open onto** a deeper understanding between us.
phrasal-verb

own your progress

Meaning
to take pride in and acknowledge your personal growth
Example
You should **own your progress** and celebrate every small win.
idiom

open a Pandora’s box

Meaning
to start something that causes many unexpected problems
Example
Unregulated AI development may **open a Pandora’s box** of ethical issues.
idiom

on the dot

Meaning
exactly on time; punctual
Example
The meeting started **on the dot** at 10 a.m.
idiom

open the floodgates

Meaning
to allow something to happen on a large scale; to trigger a chain reaction
Example
When the security flaw was leaked, it **opened the floodgates** for hackers worldwide.
idiom

Opportunity knocks but once

Meaning
Good opportunities are rare and should be seized when they appear.
Example
Don't miss the chance, **opportunity knocks but once**.
idiom

open up about

Meaning
to share personal thoughts or feelings
Example
He finally **opened up about** the project stress.
phrasal-verb

open hearts to

Meaning
to show kindness and acceptance toward people of other cultures
Example
We should **open our hearts to** people who are different from us.
idiom

Open-minded

Meaning
Willing to consider new ideas or opinions.
Example
A good therapist must be **open-minded**.
idiom

on the tip of one's tongue

Meaning
when you can almost remember something but not quite
Example
His name is **on the tip of my tongue**, but I can’t recall it.
phrasal-verb

own out of

Meaning
to stop being involved because of ethical concerns
Example
The company **owned out of** the project due to ethical issues.
phrasal-verb

open doors to

Meaning
to create opportunities for cultural connection or understanding
Example
Cultural exchange programs **open doors to** meaningful friendships worldwide.
phrasal-verb

open up trade routes

Meaning
to create new paths for international exchange of goods
Example
They are negotiating to **open up trade routes** with neighboring countries.
phrasal-verb

offer help

Meaning
to volunteer to assist someone kindly
Example
It’s thoughtful to **offer help** when someone is struggling.
idiom

on cloud nine

Meaning
extremely happy; overjoyed
Example
She was **on cloud nine** after getting the job.
phrasal-verb

open up to change

Meaning
to become willing to accept new ideas or practices
Example
Societies progress when people **open up to change**.
idiom

off the beaten path

Meaning
doing something unusual or original
Example
Her ideas are always **off the beaten path**.
phrasal-verb

opt for

Meaning
to choose one thing instead of another
Example
We decided to **opt for** the smaller but cheaper apartment.
idiom

overnight success

Meaning
a person or thing that becomes successful very quickly
Example
Her first song made her an **overnight success**.
idiom

old friend

Meaning
a friend you have known for a long time
Example
I met an **old friend** from college yesterday.
idiom

on fire

Meaning
performing very well; full of energy and success
Example
The sales team is **on fire** this month!
phrasal-verb

open up new perspectives

Meaning
to help someone see things in a new or different way
Example
Traveling to different countries can **open up new perspectives** on life.
phrasal-verb

open within

Meaning
to connect with your inner emotions and understand yourself better
Example
Yoga helps me to **open within** and feel peaceful.
idiom

on your last legs

Meaning
completely exhausted or near collapse
Example
After working 18 hours straight, I was **on my last legs**.
phrasal-verb

open channels with

Meaning
to start communication with an individual or group
Example
The company **opened channels with** its overseas partners to share updates.
idiom

out of orbit

Meaning
beyond control; off the usual path
Example
The project went **out of orbit** after the manager left.
idiom

On the record

Meaning
Officially stated and reportable
Example
She made her statement **on the record** during the interview.
idiom

on the bench

Meaning
serving as a judge in a court
Example
She spent 20 years **on the bench** before retiring.
idiom

out of one’s mind

Meaning
crazy or extremely worried
Example
He must be **out of his mind** to drive so fast in the rain.
phrasal-verb

open up communication

Meaning
to start or improve honest and clear communication
Example
They tried to **open up communication** to solve their issues.
idiom

on the money

Meaning
exactly correct or accurate
Example
His prediction about the stock was **on the money**.
idiom

Out of curiosity

Meaning
Because of a desire to know or learn something.
Example
I asked him **out of curiosity**, not to interfere.
idiom

over it

Meaning
no longer interested or affected by something
Example
I'm totally **over it** now.
idiom

out of your mind

Meaning
crazy or extremely worried
Example
You must be **out of your mind** to drive that fast!
idiom

own up to something

Meaning
to admit or confess responsibility for something
Example
You should **own up to your mistakes** instead of blaming others.
idiom

Open a can of worms

Meaning
To start something that creates many new problems.
Example
By questioning the policy, he **opened a can of worms**.
idiom

on the fast track

Meaning
advancing quickly in a career or project
Example
He is **on the fast track** to becoming a manager.
idiom

online presence

Meaning
the existence and activity of a person or business on the internet
Example
A strong **online presence** is essential for digital marketing.
idiom

on the big screen

Meaning
appearing in a cinema film
Example
Her novel was adapted **on the big screen** last year.
phrasal-verb

open out emotionally

Meaning
to start expressing feelings freely
Example
It took her months to **open out emotionally** after the breakup.
idiom

on your shoulders

Meaning
used when someone has responsibility for something
Example
The success of this plan rests **on your shoulders**.
idiom

over the horizon

Meaning
something that is expected to happen soon
Example
A big change in the market may be **over the horizon**.
idiom

off the top of your head

Meaning
to say something without deep thinking or preparation
Example
I can’t remember the exact number **off the top of my head**.
idiom

out of one’s comfort zone

Meaning
doing something unfamiliar or challenging
Example
She stepped **out of her comfort zone** to take a new job.
idiom

on the right side of the law

Meaning
acting legally; not breaking any laws
Example
He wants to stay **on the right side of the law**.
phrasal-verb

own up to mistakes

Meaning
to admit errors openly so they can be fixed
Example
Good leaders **own up to mistakes** before they snowball.
phrasal-verb

open up to trade

Meaning
to start allowing international trade or economic exchange
Example
Many developing nations are trying to **open up to trade** to attract foreign investment.
idiom

on solid ground

Meaning
in a safe or stable situation
Example
After months of hard work, the company is now **on solid ground**.
idiom

on the rise

Meaning
increasing or growing in value or number
Example
Tech stocks are **on the rise** this quarter.
phrasal-verb

opt against

Meaning
to decide not to choose a particular option
Example
After considering the risks, the company **opted against** the merger.
phrasal-verb

open up space for joy

Meaning
to make emotional room for happiness after pain
Example
After forgiving herself, she began to **open up space for joy**.
idiom

on the world stage

Meaning
in the international arena or community
Example
The country's economy is now strong **on the world stage**.
idiom

Old school

Meaning
Having traditional ideas or values; not modern
Example
My father still prefers handwritten letters; he’s really **old school**.
idiom

on thin ice

Meaning
in a risky or dangerous situation
Example
You are **on thin ice** with that behavior.
phrasal-verb

open through

Meaning
to access understanding by going through experiences of another culture
Example
You can **open through** empathy to truly understand cultural values.
idiom

on the horizon

Meaning
likely to happen soon
Example
A new product launch is **on the horizon**.
idiom

off the top of my head

Meaning
without much thought or preparation
Example
Off the top of my head, I’d say we need more time.
idiom

on the front line

Meaning
directly involved in the most active or dangerous part of something
Example
Doctors were **on the front line** during the pandemic.
phrasal-verb

open yourself to

Meaning
to allow yourself to experience emotions or connections
Example
He finally decided to **open himself to** love again.
idiom

on the up and up

Meaning
honest; truthful; not involved in any wrongdoing
Example
She’s always been **on the up and up** with me.
phrasal-verb

open up to someone

Meaning
to share personal feelings or problems with someone you trust
Example
He finally **opened up to** his friend about what he had been going through.
idiom

overfitting

Meaning
when a model performs well on training data but poorly on unseen data
Example
The model seems to be **overfitting** because it performs well on the training data but poorly on the test set.
phrasal-verb

open oneself to

Meaning
to allow oneself to experience or understand new ideas or cultures
Example
Living abroad helped him **open himself to** diverse ways of life.
phrasal-verb

open up to

Meaning
to become more willing to accept or consider new ideas, cultures, or people
Example
As globalization spread, many countries began to **open up to** cultural exchange.
idiom

out of bandwidth

Meaning
too busy or overwhelmed to handle more tasks
Example
I’m **out of bandwidth** today, can we talk tomorrow?
idiom

on the go

Meaning
always busy or active; traveling a lot
Example
She's always **on the go** with her work trips.
phrasal-verb

open up trade

Meaning
to make international trade easier by removing barriers
Example
The new agreement will **open up trade** between the two nations.
phrasal-verb

open emotionally to

Meaning
to allow emotional vulnerability and express real feelings to someone
Example
It’s hard for him to **open emotionally to** others after being hurt.
phrasal-verb

open up over

Meaning
to share personal thoughts because of a particular topic
Example
She finally **opened up over** her anxiety during group coaching.
idiom

old buddy old pal

Meaning
An affectionate way to refer to a longtime friend.
Example
Hey **old buddy old pal**, long time no see!
idiom

on the cutting block

Meaning
being considered for elimination or discontinuation
Example
Due to budget cuts, several research projects are now **on the cutting block**.
idiom

on your own shoulders

Meaning
to be responsible for something yourself
Example
The success of this event rests **on your own shoulders**.
idiom

on the spot

Meaning
to make a decision immediately
Example
He was asked to decide **on the spot**.
idiom

off the hook

Meaning
to be free from blame or responsibility for something
Example
He was **off the hook** after his friend confessed.
idiom

on the warpath

Meaning
very angry and likely to argue or fight
Example
She was **on the warpath** after hearing the bad news.