unwind vs undo

unwind and undo both are verbs.

Word	Noun	Adjective	Verb	Adverb
unwind	No	No	Yes	No
undo	No	No	Yes	No

As verbs, undo is a hypernym of unwind; that is, undo is a word with a broader meaning than unwind:

unwind (verb)	undo (verb)
become less tense, rest, or take one's ease	cancel, annul, or reverse an action or its effect
cause to feel relaxed	cause to become loose
separate the tangles of	remove the outer cover or wrapping of
reverse the winding or twisting of	deprive of certain characteristics
	cause the ruin or downfall of