unknit

verb (used with object), un·knit·ted or un·knit, un·knit·ting.

1. to untie or unfasten (a knot, tangle, etc.); unravel (something knitted); undo.
2. to weaken, undo, or destroy.
3. to smooth out (something wrinkled).

verb (used without object), un·knit·ted or un·knit, un·knit·ting.

4. to become undone.

verb -knits, -knitting, -knitted or -knit

1. to make or become undone, untied, or unravelled
2. (tr) to loosen, weaken, or destroyto unknit an alliance
3. (tr) rare to smooth out (a wrinkled brow)