Examples of use of unscrew
1. You unscrew the handle and theres this flask and . . . Hello?
2. Unscrew the cap the wrong way or drop the bottle and it will blow you and your bomb factory to smithereens.
3. Certainly if goods are faulty (and some most certainly are), or if a spanner is not «fit for the purpose» of unscrewing the nut it was designed to unscrew, then money back, no question.
4. "We sure appreciate you answering that age–old question from Mission Control –– how many astronauts does it take to unscrew a bolt," said astronaut Pam Melroy in Mission Control in Houston.
5. And few of them, in the event of a prang, will be able to reach into the toolbox, draw out a spanner, and simply unscrew the afflicted piece of bodywork (which was probably pretty dented beforehand, anyway). Long live such simplicity.