Unscrew (verb)

1. To remove the screw or screws from something.
2. To undo or release something that has been screwed in place.

Origin:

From the old english word "unscrīfan", meaning to undo or release.

Examples:

1. Please unscrew the lid of the jar so that we can fill it with jam.
2. He unscrewed the bolts from the car's engine to check for any problems.
3. She had to unscrew the light bulb in order to change it.
4. I need to unscrew the back of the clock to change the battery.
5. He unscrewed the cap of the bottle and took a sip of water.