Improper

Adjective

 * 1) unsuitable to needs or circumstances; inappropriate
 * 2) Not in keeping with conventional mores or good manners; indecent or immodest
 * 3) Not according to facts; inaccurate or erroneous
 * 4) Not consistent with established facts; incorrect
 * 5) Not properly named; See, for example, improper fraction

Verb
to improper


 * 1)  To appropriate
 * 2)  To behave improperly

Adverbs for Improper
shockingly; altogether; terribly; wantonly; carelessly; insolently; impudently; highly; inappropriately; offensively; flagrantly; defiantly; obstinately; ignorantly; bumptiously; recklessly; rashly; indiscreetly; imprudently; vexatiously; disagreeably; unpleasantly; wildly;  incorrigibly;  dreadfully; subtly; vaguely.

Thesaurus
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, inappropriate, inapt, inauspicious, incompatible, inconcinnate, inconcinnous, incongruous, inconvenient, incorrect, incorrectness, indecent, 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, naughty, 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, unfit, 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, unsuitable, unsuited, untasteful, untimely, untoward, untrue, unwise, unworthy, vernacularism, vicious, vile, villainous, vulgar, vulgarism, wicked, wrong, wrongful

Etymology
From improprius:, from in-: + proprius:.

Adjective

 * Basque: ezegoki
 * Finnish:
 * German: unpassend


 * Norwegian: upassende, uegnet
 * Portuguese:
 * Slovene: neprimeren


 * Finnish: ,
 * Norwegian: upassende, uanstendig


 * Portuguese: impróprio, indecente, indecoroso.


 * Finnish:
 * Norwegian: uriktig, feilaktig,  urettmessig


 * Portuguese: ,


 * Norwegian: uriktig


 * Portuguese: ,


 * Norwegian: feilaktig


 * Portuguese:

Derived terms

 * improper divisor
 * improper face
 * improper fit
 * improper fraction


 * improper integral
 * improper motion
 * improper node
 * improper orthogonal transformation


 * improper rotation
 * improper use
 * improper workmanship