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tr.v. un·stuck (-stŭk′), un·stick·ing, un·sticks
To free from a condition of adhesion: couldn't unstick the window.
vb, -sticks, -sticking or -stuck
(tr) to free or loosen (something stuck)
v. -stuck, -stick•ing. v.t.
1. to free, as one thing stuck to another.v.i.
2. to become unstuck.
Past participle: unstuck