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cave in

Phrasal Verb with cave
 
 
/keɪv/ verb

Definition

FALL If a ceiling, roof, or other structure caves in, it breaks and falls into the space below.
AGREE to agree to something that you were against before, after someone has persuaded you or made you afraid: The company has finally caved in to the demands of the unions.
(Definition of cave in from the Cambridge Learner's Dictionary © Cambridge University Press)

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