elective (adjective) elective: able to be chosen
Sinonime: babble, depart,
deviate, divagate, diverge, err, get off the track, get sidetracked, go astray, go off on a tangent, lose one's way, lose train of thought, ramble,
rave,
shift,
stray, swerve, talk nonsense, veer
Antonime: go direct, stay