under the hood
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idiom

under the hood

Meaning
behind the surface; the underlying mechanism or system
Example
Developers love to see what’s **under the hood** of a new app.
idiom

up against the wall

Meaning
to be in a very difficult or desperate situation
Example
The company is **up against the wall** financially after the recent losses.
idiom

under false pretenses

Meaning
by lying or misleading someone
Example
He got the job **under false pretenses**.
idiom

upload your thoughts

Meaning
to express or share one’s ideas online
Example
People love to **upload their thoughts** on social media.
idiom

use up

Meaning
to consume something completely
Example
We’ve **used up** all the printer paper already.
idiom

Unicorn company

Meaning
A startup valued at over one billion dollars.
Example
Becoming a **unicorn company** is every founder’s dream.
idiom

under the gun

Meaning
under pressure to perform or complete something
Example
We were **under the gun** to meet the deadline for the report.
idiom

user journey

Meaning
the complete experience a user has with a brand or product
Example
Mapping the **user journey** helps improve customer satisfaction.
idiom

under the knife

Meaning
to have surgery
Example
She has to go **under the knife** for her knee problem.
idiom

under construction

Meaning
in the process of being developed or built
Example
Our new website is still **under construction**.
idiom

under the radar

Meaning
unnoticed or undetected
Example
He stayed **under the radar** during the investigation.
idiom

united we stand, divided we fall

Meaning
people are stronger when they work together
Example
Remember, **united we stand, divided we fall**.
idiom

under oath

Meaning
having sworn to tell the truth in court
Example
He lied **under oath** and was charged with perjury.
idiom

under the table

Meaning
done secretly or dishonestly, often involving money
Example
He was paid **under the table** to avoid taxes.
B2 idiom

up in the air

Uncertain or undecided
Meaning
Uncertain or undecided
Example
The plans for the project are still up in the air.
The plans for the project are still up in the air.
idiom

under the stars

Meaning
in the open air, outside, especially at night
Example
We slept **under the stars** by the lake.
idiom

under pressure

Meaning
to be in a stressful situation with a lot of demands
Example
She performs well even when she’s **under pressure**.
idiom

under the microscope

Meaning
being examined very closely
Example
The new policy is **under the microscope** by analysts.
idiom

upload your brain

Meaning
to transfer or store one’s thoughts, knowledge, or consciousness digitally
Example
One day we might be able to **upload our brain** into the cloud.
idiom

under the weather

Meaning
feeling ill or unwell
Example
I didn’t go to work because I felt **under the weather**.
idiom

up to speed

Meaning
to have the latest information or be fully informed
Example
I’ll get you **up to speed** on the new system tomorrow.
idiom

upgrade your mindset

Meaning
to adapt one’s thinking for modern changes or innovation
Example
In the age of AI, it’s vital to **upgrade your mindset**.
idiom

under the pump

Meaning
to be under a lot of pressure or stress
Example
The team has been **under the pump** to meet the project deadline.
idiom

under investigation

Meaning
being examined or looked into by authorities for possible wrongdoing
Example
The suspect is currently **under investigation** for his involvement in the crime.
idiom

under someone's thumb

Meaning
completely under someone's control
Example
He's **under his boss's thumb** and can't make his own decisions.
idiom

Under the spotlight

Meaning
Receiving public attention or scrutiny.
Example
The editor has been **under the spotlight** after the controversial article.
idiom

under a cloud

Meaning
being suspected or in trouble
Example
He left the company **under a cloud** after the scandal.
idiom

upgrade your thinking

Meaning
to improve your thought process or mindset
Example
To adapt to AI trends, you must **upgrade your thinking**.
idiom

under someone's nose

Meaning
in an obvious place or situation where someone should have noticed
Example
The keys were **under my nose** the whole time on the kitchen table.