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flush out

B1 neutral separable transitive
In simple words

Either wash something clean with lots of water, or force someone hiding to come out.

Literal meaning: To push something out with a rush or flow of water — as with a toilet flush.

Meanings

1 B1 neutral

To clean or clear something by pushing water or liquid through it.

"You should flush out the water pipes before drinking from them after a long holiday."

Grammar: separable
2 B1 idiomatic neutral

To force a person, animal, or thing out of a hiding place or concealed position.

"The soldiers flushed out the remaining enemy fighters from the abandoned building."

"We've got to flush out the terrorists before they strike again."

— George W. Bush, post-9/11 press remarks, 2001 (widely reported paraphrase)
Grammar: separable
3 B2 idiomatic neutral

To bring hidden information, problems, or facts to light.

"The investigation was designed to flush out any corruption within the department."

Grammar: separable
4 B1 neutral

To remove toxins or impurities from the body by consuming large amounts of liquid.

"Drink plenty of water to flush out any toxins after the infection."

Grammar: separable
Usage notes

Has both a literal (cleaning/rinsing) and a figurative (forcing out of hiding) sense. The figurative sense is common in military, police, journalistic, and political language. In medical contexts, 'flush out' refers to clearing toxins from the body by drinking fluids.

Commonly used with

toxins system pipes suspect information criminal details

Forms

Base
flush out
I/you/we/they
3rd person
flushes out
he/she/it
Past simple
flushed out
yesterday
Past participle
flushed out
have + pp
-ing form
flushing out
continuous

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