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cave in

B1 informal inseparable intransitive
In simple words

To fall down and collapse inward like a roof collapsing, or to give up and agree to something after someone pressures you.

Literal meaning: The walls or roof of a cave (or hollow space) folding inward and collapsing.

Meanings

1 B1 neutral

(of a structure) To collapse inward suddenly.

"The miners were trapped when part of the tunnel caved in above them."

Grammar: inseparable
2 B1 idiomatic informal

To yield to pressure or demands after initially resisting.

"The government eventually caved in to public protests and reversed the policy."

"Republicans caved in to pressure from the White House."

— The Washington Post, 2018
Grammar: inseparable
Usage notes

The literal sense (structural collapse) and the figurative sense (capitulating under pressure) are both common. In the figurative sense, it implies the person resisted for a time before yielding. Often used with 'to': 'caved in to pressure.'

Commonly used with

pressure demands roof tunnel resistance lobbying

Forms

Base
cave in
I/you/we/they
3rd person
caves in
he/she/it
Past simple
caved in
yesterday
Past participle
caved in
have + pp
-ing form
caving in
continuous

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Synonyms

collapse yield give in surrender capitulate buckle

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