资料来源 : pyDict

旋开,旋松

资料来源 : Webster's Revised Unabridged Dictionary (1913)

Unscrew \Un*screw"\, v. t. [1st pref. un- + screw.]
   To draw the screws from; to loose from screws; to loosen or
   withdraw (anything, as a screw) by turning it.

资料来源 : WordNet®

unscrew
     v 1: loosen something by unscrewing it; "unscrew the outlet
          plate"
     2: loosen by turning; "unscrew the bottle cap" [ant: {screw}]