/un skrooh"/ , v.t.
1. to draw or loosen a screw from (a hinge, bracket, etc.).
2. to unfasten or withdraw by turning, as a screw or lid.
3. to open (a jar, bottle, etc.) by turning the lid or cover.
v.i.
4. to permit of being unscrewed.
[ 1595-1605; UN- 2 + SCREW ]