wear out

1.  Become or cause to become unusable through long or heavy use, as in She wears out her shoes in no time, or The coupling in this device has worn out. [Early 1400s]
2.  Exhaust, tire, as in I was worn out from packing all those books. Also see tired out. [First half of 1500s]

The verb has 3 meanings:

Meaning #1: exhaust or tire though overuse or great strain or stress
  Synonyms: tire, wear upon, tire out, wear, weary, jade, outwear, wear down, fag out, fag, fatigue

Meaning #2: go to pieces
  Synonyms: break, wear, bust, fall apart

Meaning #3: deteriorate through use or stress
  Synonyms: wear, wear off, wear thin