screw

verb (TIGHT SHAPE)

/skruː/

Definition

› [T + adv/prep] to tighten the muscles of your face or part of your face into a particular expression, especially one of disapproval or pain: He screwed his eyes tight shut against the bright light. The woman at the breakfast table screwed her mouth into a grimace.Grimacing and frowning › [T + adv/prep] to twist and crush something, especially paper or cloth, roughly with your hands: She screwed the bag up and threw it in the bin. He screwed the letter into a ball and flung it away.Making things more or less smooth or straight

(Definition of screw verb (TIGHT SHAPE) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)