improper

not appropriate for a particular occasion or situation an improper use of slang in a formal piece of writing Synonyms amiss, graceless, inappropriate, inapposite, inapt, incongruous, incorrect, indecorous, inept, infelicitous, malapropos, perverse, unapt, unbecoming, unfit, unhappy, unseemly, unsuitable, untoward, wrongRelated Words inopportune, unfortunate, unseasonable, untimely; extraneous, immaterial, inapplicable, irrelative, irrelevant; misbecoming, mismatched; incompatible, inconsistent, uncongenial; bad, naughty, sinful; blamable, blameworthy, censurable; banned, barred, disallowed; forbidden, interdicted, outlawed, prohibited, proscribed; awkward, gauche, ungraceful; unacceptable, unsatisfactoryNear Antonyms fortunate, opportune, seasonable, timely; applicable, apposite, apropos, apt, germane, material, pat, pointed, relative, relevant; compatible, congenial, harmonious; allowed, authorized, permitted; approved, endorsed (also indorsed), kosher, licensed, sanctioned; abetted, encouraged, promoted, supported; acceptable, adequate, all right, decent, fine, OK (or okay), passable, respectable, satisfactory, tolerable; commendable, creditable, exemplary; blameless, irreproachable; balanced, companionate, congruous, consonant, harmoniousAntonyms appropriate, becoming, befitting, correct, decorous, felicitous, fit, fitting, genteel, happy, meet, proper, right, seemly, suitable