Adj.	1.	improper - not suitable or right or appropriate; "slightly improper to dine alone with a married man"; "improper medication" Antonyms: proper - marked by suitability or rightness or appropriateness; "proper medical treatment"; "proper manners"
	2.	improper - not conforming to legality, moral law, or social convention; "an unconventional marriage"; "improper banking practices" Synonyms: unlawful, unconventional
	3.	improper - not appropriate for a purpose or occasion; "unsuitable attire for the office"; "said all the wrong things" Synonyms: wrong, unsuitable

Doric, aberrant, abnormal, abominable, amiss, arrant, atrocious, bad, barbaric, barbarous, base, black, blamable, blameworthy, blooper, boner, boo-boo, break, cacophonous, careless, chintzy, clumsy, coarse, corrupt, corruption, criminal, crude, damnable, dark, delinquent, deviant, disgraceful, disorderly, disruptive, doggerel, dysphemistic, erroneous, evil, excessive, execrable, false, faulty, faux pas, flagitious, flagrant, foul, fresh, futile, gaffe, gauche, graceless, gross, hardly the thing, harsh, heinous, ignominious, ill, ill-adapted, ill-advised, ill-assorted, ill-chosen, ill-considered, ill-fitted, ill-matched, ill-seasoned, ill-sorted, ill-suited, ill-timed, illegal, immodest, immoral, impertinent, impolite, impolitic, imprecise, impropriety, impure, in bad taste, inaccurate, inadmissibility, inadmissible, inadvisable, inapplicable, inapposite, inapt, inauspicious, incompatible, inconcinnate, inconcinnous, incongruous, inconvenient, incorrect, incorrectness, indecorous, indecorousness, indecorum, indelicate, indiscreet, inelegance, inelegant, inept, inexact, inexpedient, infamous, infelicitous, inferior, informal, iniquitous, inopportune, intempestive, intrusive, invalid, irregular, irrelevant, knavish, lascivious, late, lewd, loose, low, mal a propos, maladjusted, malapropos, malevolent, malodorous, misbehaving, misjoined, mismatched, mismated, misplaced, mistaken, mistimed, monstrous, nefarious, not done, not respectable, not the thing, objectionableness, obscene, off base, off color, off-base, off-color, offensive, out of character, out of joint, out of keeping, out of line, out of phase, out of place, out of proportion, out of season, out of time, out of tune, out-of-line, outlandish, peccant, premature, rank, reprehensible, reprobate, risque, rough, rowdy, rowdyish, rude, ruffianly, sacrilegious, sassy, scandalous, shameful, shameless, sinful, sinister, slipshod, slovenly, solecism, solecistic, suggestive, tactless, tasteless, terrible, too late, too soon, unacceptableness, unadapted, unapt, unbecoming, unbecomingness, unbefitting, unbehaving, unbeseeming, uncalled-for, unceremonious, uncomely, unconventional, uncourtly, uncouth, undecorous, undesirable, undignified, undue, uneuphonious, unfavorable, unfelicitous, unfitted, unfitting, unforgivable, unfortunate, ungenteel, ungodly, ungraceful, ungrammatic, unhandy, unhappy, unhealthy, unkind, unlawful, unlucky, unmeet, unmeetness, unpardonable, unpleasant, unpolished, unprofitable, unpropitious, unqualified, unready, unrefined, unrighteous, unripe, unseasonable, unseemliness, unseemly, unskillful, unspeakable, unsuited, untasteful, untimely, untoward, untrue, unwise, unworthy, vernacularism, vicious, vile, villainous, vulgar, vulgarism, wicked, wrong, wrongful