unwind

(ŭn-wīndˈ)

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.

1. To become unwound.
2. To become free of nervous tension; relax: liked to unwind with a cocktail before dinner.