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unsaturation
unsavory
unsay
unsayable
unscathed
unschooled
unscientific
unscramble
unscrew
unscripted
unscriptural
unscrupulous
unseal
unseam
unsearchable
unseasonable
unseasoned issue
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unscrew

un·screw [ un skr ] (past and past participle un·screwed, present participle un·screw·ing, 3rd person present singular un·screws)


transitive and intransitive verb 
Definition:
 
1. remove or loosen screws of something: to remove or loosen a screw or screws holding something in place, or have a screw or screws removed or loosened

2. open something by removing threaded lid: to open something by turning and removing a threaded lid or cap, or be opened in this way

3. turn to remove or adjust something: to remove or adjust something by rotating, or be removed or adjusted by rotating

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