disengage

(verb) release from something that holds fast, connects, or entangles. Synonyms: withdraw. Examples: "I want to disengage myself from his influence." "Disengage the gears."

(verb) free or remove obstruction from. Synonyms: free. Example: "Free a path across the cluttered floor."

(verb) become free. Example: "In neutral, the gears disengage."