DictionarycrumbleFalling apart
verb / noun

crumble

KRUM-buhl/ˈkrʌmbl/

To break into small loose pieces.

The dry cookie crumbles into tiny pieces in my hand.

Close-up of an older woman's hands crumbling a dry biscuit over a plain plate, with irregular crumbs visibly falling from the broken edge.
Etymology

Middle English kremelen meant “to break into small fragments” and is thought to continue a repeated-action formation related to crumb. The meaning extended from breaking something into pieces to its falling apart.

In context

True Tales2:47
investors once eager to be part of Holmes's Revolution were now scrambling to distance themselves from the Scandal the House of Cards Holmes had so carefully constructed was beginning to crumble
The Rise and Fall of Elizabeth Holmes: A True Crime Documentary

More examples

  • Crumble the cheese over the salad.
  • The old mortar crumbles when I touch it.
  • Their plans crumble when the funding disappears.

Forms

crumble · crumbles · crumbled · crumbling

crumb noun — A small piece of bread or cake.

crumbly adjective — Easily broken into small, loose pieces.

Similar words

disintegrate
Suggests more complete breakdown, often into very fine particles.
flake
Means breaking off in thin, flat pieces rather than crumbs.