From The Collaborative International Dictionary of English v.0.48 [gcide]: Crumble \Crum"ble\ (kr[u^]m"b'l), v. t. [imp. & p. p. Crumbled (kr[u^]m"b'ld); p. pr. & vb. n. Crumbling (kr[u^]m"bl[i^]ng).] [Dim. of crumb, v. t., akin to D. kruimelen G. kr["u]meln.] To break into small pieces; to cause to fall in pieces. [1913 Webster] He with his bare wand can unthread thy joints, And crumble all thy sinews. --Milton. [1913 Webster]