Main Entry: ¹crum·ble

Pronunciation: \ˈkrəm-bəl\

Function: verb

Inflected Form(s): crum·bled; crum·bling \-b(ə-)liŋ\

Etymology: alteration of Middle English kremelen, frequentative of Old English gecrymian to crumble, from cruma

Date: 1547

transitive verb : to break into small piecesintransitive verb 1 : to fall into small pieces : disintegrate
2 : to break down completely : collapse <marriages crumble>