toggle

any instruction that works first one way and then the other; it turns something on the first time it is used and then turns it off the next time

a hinged switch that can assume either of two positions

a fastener consisting of a peg or pin or crosspiece that is inserted into an eye at the end of a rope or a chain or a cable in order to fasten it to something (as another rope or chain or cable)

provide with a toggle or toggles

fasten with, or as if with, a toggle

release by a toggle switch; "toggle a bomb from an airplane"