Unfix (verb)

1. To loosen or undo the fixing of something.
2. To remove something from its fixed position.
3. To unfasten, unstick, or unfasten something from something else.

Origin:

Late 17th century, from un- + fix.

Examples:

1. He unfixed the knot in the rope.
2. She unfixed the picture from the wall.
3. They unfixed the lock on the door.
4. The mechanic unfixed the engine parts.
5. He unfixed the lid on the jar.