Unwind
/ʌnˈwaɪnd/
noun
Any mechanism or operation that unwinds something.
verb
To separate (something that is wound up)
“Could you unwind about a foot of ribbon so I can finish the package?”
To disentangle
To relax; to chill out; to rest and relieve of stress
“After work, I like to unwind by smoking a pipe while reading the paper.”