1crum·ble 
/ˈkrʌmbəl/ verb
crum·bles; crum·bled; crum·bling /ˈkrʌmbəl/ verb 1 [+ obj] : to break (something) into small pieces
▪ Crumble the cookies into small bits. ▪ The recipe calls for the herbs to be crumbled. 2 [no obj] : to separate into many small pieces : to fall apart
▪ The arch had crumbled [=disintegrated] under the weight of all those stones. ▪ bones so old they had crumbled to dust ▪ crumbling buildings/monuments/walls 3 [no obj] : to break down completely : to stop functioning
▪ Peace talks between the two parties have crumbled. [=collapsed] ▪ She was extremely depressed after her marriage crumbled. ▪ their crumbling marriage
▪ Crumble the cookies into small bits. ▪ The recipe calls for the herbs to be crumbled.
▪ The arch had crumbled [=disintegrated] under the weight of all those stones. ▪ bones so old they had crumbled to dust ▪ crumbling buildings/monuments/walls
▪ Peace talks between the two parties have crumbled. [=collapsed] ▪ She was extremely depressed after her marriage crumbled. ▪ their crumbling marriage
that's the way the cookie crumbles — see cookie
