Main entry: dilapidate, crumble, decay
Definition: fall into decay or ruin
Usage: The unoccupied house started to decay
Main entry: fall apart, crumble
Definition: break or fall apart into fragments
Usage: The cookies crumbled; The Sphinx is crumbling
Main entry: collapse, break down, crumble, crumple, tumble
Definition: fall apart
Usage: the building crumbled after the explosion; Negotiations broke down