un·wind 
(ŭn-wīnd)
(ŭn-wīnd)v. un·wound(ŭn-wound), un·wind·ing, un·winds
v. tr.
1. To reverse the winding or twisting of: unwind a ball of yarn.
2. To separate the tangled parts of; disentangle.
3. To free (someone) of nervous tension or pent-up energy.
4. Business To back off from (a stated policy or financial commitment): “The US was preparing to unwind its asset purchase programme as the economy picked up” (Elaine Moore).
v. intr.
1. To become unwound.
2. To become free of nervous tension; relax: liked to unwind with a cocktail before dinner.