From Longman Dictionary of Contemporary Englishunscrewun‧screw /ʌnˈskruː/ verb [transitive] 1 OPENto open something by twisting it► see thesaurus at open2 Tto take the screws out of something→ See Verb table
Examples from the Corpus
unscrew• Pills are stored in containers with tops that are difficult for children to unscrew.• Robyn unscrewed a jar of moisturiser and smoothed it over her face and neck.• Robyn unscrewed a jar of moisturiser and smoothed it over her face.• Then, the top of the urn gave way and unscrewed as if it had been oiled.• Willi unscrewed the cap from a metal flask and passed it to him.• I unscrewed the cap of the flask and very carefully poured in some scotch from the bottle.• He unscrewed the catapult piece by piece feeling depressed.• Then he took out one of those dolls, each piece of which unscrews to reveal a smaller doll within. 