fall apart

verb3

1. •
   To disintegrate, to break into pieces.

   • My old briefcase is falling apart. I'll have to buy a new one.
2. •
   To be emotionally in crisis.

   • As a result of being addicted to heroin, she was falling apart.
3. •
   To separate.

   • Again the mountains fall apart, and in a wide basin of corn-land and pasture lies the bourgade of La Thuile. — 1887