verb. loosen something by unscrewing it.
verb. loosen by turning.
Sentences with unscrew
1. Verb, past tense
Open the soda machine with its barrel key and unscrew the lock, allowing the door to swing open.
2. Verb, base form
You must unscrew the watch crown before you can make any changes to the watch time.
3. Verb, non-3rd person singular present
When unscrewing the lining, make a note of the order in which you unscrew it from the bars.