cave in
phrasal verbcave in (on somebody/something)
- (of a roof, wall, etc.) to fall down and towards the centre
- The ceiling suddenly caved in on top of them.
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cave in (to something)
- to finally do what somebody wants after you have been strongly opposing them; to accept defeat
- The president is unlikely to cave in to demands for a public inquiry.
- In the 86th minute, their defence caved in.