Disengage

dis·en·gage [dis-en-geyj]

1. to release from attachment or connection; loosen; unfasten: to disengage a clutch.
2. to free (oneself) from an engagement, pledge, obligation, etc.: He accepted the invitation, but was later forced to disengage himself.
3. Military. to break off action with (an enemy).

–verb (used without object)

4. to become disengaged; free oneself.