cave in

Definitions of cave in
  1. noun
    the sudden collapse of something into a hollow beneath it
    synonyms: subsidence
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    type of:
    a natural event caused by something suddenly falling down or caving in
  2. verb
    break down, literally or metaphorically
    synonyms: break, collapse, fall in, founder, give, give way
    abandon, give up
    stop maintaining or insisting on; of ideas or claims
    burst, collapse
    cause to burst
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    go off, implode
    burst inward
    buckle, crumple
    fold or collapse
    fall loosely
    curl over and fall apart in surf or foam, of waves
    sink, slide down, slump
    fall or sink heavily
    type of:
    undergo a change; become different in essence; losing one's or its original nature
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