pre-requisite (adjective) prerequisite: necessary
Detalii: a perquisite is a profit or benefit in addition to a salary or wages or a gratuity or tip for services performed, while a prerequisite is something that is required in advance
Sinonime: attention-grabber,
bait,
commotion, curve ball,
deviation,
distraction, distractor,
disturbance,
diversion, diversionary tactic, false clue, false face, false trail, fool's errand, gimmick,
interruption,
maneuver,
ploy, smoke screen, wild-goose chase
Antonime: optional,
unnecessary,
voluntary