obligatory Definition

compulsory, mandatory, de rigueur, required, prerequisite, necessary, indispensable, bounden, imposed, incumbent on, obliged, mandated, requirement, minimum, statutory, peremptory, imperative, duty, overarching, obligation, obligate, restrictive, compelling, compensatory, forced, coercive, enforceable, binding, duty-bound, must-have, non-discretionary, perfunctory, requisite, customary, superfluous, gratuitous, optional, pointless, meaningless, supererogatory, aforementioned, unavoidable, inevitable, incidental, interminable, occasional, desultory, tiresome, pseudo, otiose, banal, ersatz, silly, nauseating, ceremonious, obliging, overlong, endless, lame, invariable, ostensible, chaucerian, risible, levitical, adverbial, parenthetical, overindulgent, briefest, obsequious, tedious, prefatory, initiatory, terminological, nonsensical, mirthless, fatuous, schoolmasterly, insufferable, deathless, onanistic, queenly, copious, ritualised, cheesy, cretinous, worthy, impromptu, lachrymose, awkward, irksome, faux, suchlike, obvious, cringeworthy, unvarying, hackneyed, explicit, rote, jocose, unmentionable,