unwind

Short definition from Wiktionary

Verb

1. 1
   To separate (something that is wound up)
2. 2
   To disentangle
3. 3
   To relax; to chill out; to rest and become relieved of stress
4. 4
   To be or become unwound; to be capable of being unwound or untwisted.
5. 5
   To close out a position, especially a complicated position.
6. 6
   To undo something.
7. 7
   To navigate back through (a call stack) so as to generate a stack trace etc.
8. 8
   To unravel or explain.

Noun

1. 1
   Any mechanism or operation that unwinds something.