CRUMBLING

Verb

crumbling

present participle of crumble

Noun

crumbling (plural crumblings)

Material that has crumbled away; crumbs.

Source: Wiktionary

CRUMBLE

Crum"ble (krm"b'l), v. t. [imp. & p. p. Crumbled (-b'ld); p. pr. & vb. n. Crumbling (-blng).] Etym: [Dim. of crumb, v. t., akin to D. krimelen G. kr.]

Definition: 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.

Definition: 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.

Source: Webster’s Unabridged Dictionary 1913 Edition