Crumble

Part of speech: verb (v.)

To break into small pieces; to cause to fall in pieces. He with his bare wand can unthread thy joints, And crumble all thy sinews. Milton.

Part of speech: verb (v.)

To fall into small pieces; to break or part into small fragments; hence, to fall to decay or ruin; to become disintegrated; to perish. If the stone is brittle, it will crumble and pass into the form of gravel. Arbuthnot. The league deprived of its principal supports must soon crumble to pieces. Prescott.