Crum"ble (kr?m"b'l), v. t. [imp. & p. p. Crumbled (-b'ld); p. pr. & vb. n. Crumbling (-bl?ng).] [Dim. of crumb, v. t., akin to D. krimelen G. kr&?;meln.] 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.

Crum"ble, v. i. 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.

• To fall apart; to disintegrate.