Verb crumble has 3 senses
  1. crumble, crumple, tumble, break down, collapse - fall apart; "the building crimbled after the explosion"; "Negociations broke down"
    --1 is one way to change integrity
    Sample sentence:
    The business is going to crumble
  2. crumble, fall apart - break or fall apart into fragments; "The cookies crumbled"; "The Sphinx is crumbling"
    --2 is one way to disintegrate
    Sample sentences:
    Something ----s
    Something is ----ing PP
  3. decay, crumble, delapidate - fall into decay or ruin; "The unoccupied house started to decay"
    --3 is one way to change
    Sample sentences:
    Something ----s
    Somebody ----s
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