verb (v)

• fall apart(verb.motion)

  Example:
  The building crumbled after the explosion.
  

  Synonym:
  break down, collapse, crumple, tumble
  

  source: wordnet30
• break or fall apart into fragments(verb.change)

  Example:
  The cookies crumbled.
  

  Synonym:
  fall apart
  

  source: wordnet30
• fall into decay or ruin(verb.change)

  Synonym:
  decay, dilapidate
  

  source: wordnet30
• To break into small pieces; to cause to fall in pieces.(verb)

  source: webster1913
• To fall into small pieces; to break or part into small fragments; hence, to fall to decay or ruin; to become disintegrated; to perish.(verb)

  source: webster1913