open the floodgates
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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

on the go

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

open and shut case

Meaning
a case that is easily decided or obvious
Example
It was an **open and shut case** with clear evidence.
idiom

on the rise

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

open-hearted

Meaning
kind and honest in expressing feelings
Example
She is an **open-hearted** person who always listens.
idiom

offline mode

Meaning
a state of being disconnected from the internet or unavailable
Example
He’s been in **offline mode** all weekend, not answering any messages.
idiom

out of orbit

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

open minds through dialogue

Meaning
to encourage understanding between cultures by communicating openly
Example
The conference aimed to **open minds through dialogue** between communities.
idiom

out of the picture

Meaning
no longer involved or relevant
Example
After the gallery closed, the curator was **out of the picture**.
phrasal-verb

open up to differences

Meaning
to accept and appreciate diversity
Example
Children should learn to **open up to differences** from an early age.
idiom

overnight success

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

open yourself up

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

on the right track

Meaning
to be going in the correct direction to achieve success
Example
Your plan sounds great — you’re **on the right track**.
idiom

on the same wavelength

Meaning
to think in a similar way as someone else
Example
My best friend and I are always **on the same wavelength**.
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

over the hill

Meaning
past one's prime; no longer young or at peak performance
Example
Some people think turning forty means you’re **over the hill**, but that’s not true.
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 top of the world

Meaning
to feel extremely happy and successful
Example
After winning the award, he felt **on top of the world**.
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.
idiom

open channels of communication

Meaning
to establish dialogue or discussion
Example
They tried to **open channels of communication** with the neighboring country.
phrasal-verb

open your mind to

Meaning
to start considering or accepting new ideas or opinions
Example
Studying anthropology can help you **open your mind to** cultural diversity.
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**.
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

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 onto

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

on cloud nine

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

open up to peace

Meaning
to allow yourself to feel inner calmness
Example
Through meditation, I’ve learned to **open up to peace**.
idiom

on the same playing field

Meaning
in the same conditions or with equal chances
Example
We’re now **on the same playing field** as our competitors.
idiom

out of the frying pan into the fire

Meaning
to go from a bad situation to a worse one
Example
Leaving that job was like jumping **out of the frying pan into the fire**.
idiom

on your plate

Meaning
something that is your responsibility or job to handle
Example
I have too much **on my plate** right now with all the projects.
phrasal-verb

open with gratitude

Meaning
to start a conversation or message by expressing thanks
Example
She **opened with gratitude** before discussing the main issue.
idiom

open a new chapter

Meaning
to begin a new stage or period in life
Example
Graduating from university **opened a new chapter** in her life.
phrasal-verb

open the heart to

Meaning
to express your honest emotions to someone
Example
He finally **opened his heart to** his parents.
phrasal-verb

open up to others

Meaning
to share thoughts and feelings with people from other cultures
Example
When you **open up to others**, you start to understand their perspectives better.
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.
phrasal-verb

own the mistake quickly

Meaning
to admit an error right away
Example
I **own the mistake quickly** and explain the fix to my team.
phrasal-verb

open communication with

Meaning
to establish an honest and transparent exchange of thoughts and feelings
Example
Couples should **open communication with** each other to avoid misunderstandings.
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 the ball

Meaning
alert, smart, and quick to react
Example
You need to be **on the ball** to handle this job.
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**.
phrasal-verb

open yourself up to

Meaning
to allow yourself to express feelings or be vulnerable
Example
He learned to **open himself up to** love again.
idiom

on the run

Meaning
trying to avoid being caught by the police
Example
The suspect has been **on the run** for three days.
idiom

on one's shoulders

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

on the witness stand

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

out of harm’s way

Meaning
To be safe from danger or difficulty.
Example
Make sure the children are **out of harm’s way** before lighting the fire.
idiom

out of the blue

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

own up

Meaning
to admit or confess to something.
Example
He finally **owned up** to breaking the vase.
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

open heart

Meaning
to be honest and kind in feelings and actions
Example
He welcomed everyone with an **open heart**.
phrasal-verb

open out

Meaning
to become more confident, relaxed, and expressive emotionally
Example
He started to **open out** after making new friends at work.
idiom

old friends are gold

Meaning
old friends are precious and valuable
Example
I always say, **old friends are gold**.
idiom

out of this world

Meaning
extremely good or impressive
Example
The food at that restaurant is **out of this world**.
idiom

off the air

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

Meaning
undecided or unsure about something
Example
She’s still **on the fence** about moving abroad.
idiom

out with the old, in with the new

Meaning
to replace old things or ideas with new ones
Example
It's time for **out with the old, in with the new**.
idiom

Open-minded

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

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.
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

off to a flying start

Meaning
to begin something, like a journey, very successfully
Example
Our trip was **off to a flying start** with perfect weather.
phrasal-verb

open toward

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

out of balance

Meaning
to feel mentally or emotionally unstable
Example
Lack of rest can make you feel **out of balance**.
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 your last legs

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

open dialogue with

Meaning
to start conversations or discussions with another culture or group
Example
The organization aims to **open dialogue with** minority communities.
idiom

out of your league

Meaning
too good or powerful to compete with
Example
That company is **out of our league** in terms of resources.
phrasal-verb

open up about kindness

Meaning
to speak honestly about acts of kindness or gratitude
Example
He finally **opened up about kindness** he received from strangers.
idiom

On the clock

Meaning
Working, often with a strict time limit or deadline.
Example
I’m **on the clock** today, so I can’t waste any time.
idiom

on the spot

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

open to abuse

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

on the big screen

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

on the grapevine

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

owe to

Meaning
to feel you should thank someone for something
Example
I **owe my success to** my parents’ support.
phrasal-verb

open your heart to

Meaning
to express love, trust, or care freely
Example
It’s important to **open your heart to** those who care about you.
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.
idiom

out of bounds

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

own your mistakes

Meaning
to take responsibility for what you did wrong.
Example
It’s important to **own your mistakes** and learn from them.
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

over the moon

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

opt in

Meaning
to choose to participate
Example
Employees can **opt in** to the wellness program.
idiom

opt out of

Meaning
to choose not to participate in something
Example
You can **opt out of** the newsletter at any time.
idiom

one in a million

Meaning
very special or rare
Example
Her kindness makes her **one in a million**.
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 background

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

opt for

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

on your own shoulders

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

on cue

Meaning
exactly at the right moment
Example
The dog barked **on cue** when the actor opened the door.
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

on the rebound

Meaning
starting a new relationship soon after a breakup
Example
He started dating again **on the rebound**.
idiom

Out of fashion

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

On the breadline

Meaning
Living in poverty or with very little money.
Example
After losing his job, he was almost **on the breadline**.
idiom

on the beat

Meaning
a police officer's regular patrol route
Example
The officer was **on the beat** when he spotted the suspect.
idiom

off the beaten path

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

On the record

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

on one’s last legs

Meaning
to be near the end of one’s strength or life
Example
After the long hike, we were all **on our last legs**.
idiom

out of memory

Meaning
unable to think clearly; mentally exhausted
Example
After working all night, I was completely **out of memory**.
phrasal-verb

open eyes to

Meaning
to make someone realize or become aware of something important
Example
The film **opened people’s eyes to** the struggles of the poor.
idiom

out of sorts

Meaning
feeling slightly unwell or upset
Example
He’s been **out of sorts** since he caught that cold.
phrasal-verb

open around

Meaning
to act friendly and emotionally available with people nearby
Example
She always **opens around** people she trusts.
idiom

old flame

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

open up with

Meaning
to start a conversation by being honest or expressive about feelings
Example
He chose to **open up with** a personal story to make others feel comfortable.
idiom

on the mend

Meaning
recovering from an illness or injury
Example
I was sick last week, but I’m **on the mend** now.
idiom

offbeat

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

Out of focus

Meaning
Not clear or not paying attention
Example
He looked tired and completely **out of focus** during the meeting.
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

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 level

Meaning
honest and sincere; not trying to deceive
Example
You can trust her—she’s **on the level**.