unscrew
v
(a) [Tn] loosen (a screw, nut, etc) by turning it; unfasten (sth) by removing screws 旋松(螺丝、 螺母等); 旋下螺丝以松开(某物)
unscrew the door-handle 松开门拉手上的螺丝.
(b) [I, Tn] (make sth) come undone by twisting (将某物)拧开
The lid of this jam pot won´t unscrew. 这果酱罐的盖子拧不开.