break down
1. To cause to collapse; destroy: break down a partition; broke down our resolve.
2.
a. To become or cause to become distressed or upset.
b. To have a physical or mental collapse.
3. To give up resistance; give way: prejudices that break down slowly.
4. To fail to function; cease to be useful, effective, or operable.
5. To render or become weak or ineffective:
