It would be a variant of lengthening ("stretch, make a distance"), but created meanings (especially as a pronominal) that differentiate it, since it is used for "release, release, move away, take distance from something".
It means to give the exit or the departure (in a competition). In Colombia it also means to let go. Loosen a rope or a handle slowly. It can also be saying one thing with insolence and bad manners.
That the legal take someone to the garden