THESAURUS
undiplomatic
airy, brash, careless, casual, cursory, degage, disregardant, disregardful, easygoing, flippant, forgetful, free and easy, heedless, impolitic, inconsiderate, indifferent, insouciant, lazy, maladroit, oblivious, offhand, perfunctory, reckless, regardless, respectless, tactless, thoughtless, unheedful, unheeding, unmindful, unprepared, unready, unsolicitous, untactful, unthinking
ROGET THESAURUS
undiplomatic
Discourtesy
N
discourtesy, ill breeding, ill manners, bad manners, ungainly manners, insuavity, uncourteousness rusticity, inurbanity, illiberality, incivility displacency, disrespect, procacity, impudence: barbarism, barbarity, misbehavior, brutality, blackguardism, conduct unbecoming a gentleman, grossieret_e, brusquerie, vulgarity, churlishness, spinosity, perversity, moroseness, sternness, austerity, moodishness, captiousness, cynicism, tartness, acrimony, acerbity, virulence, asperity, scowl, black looks, frown, short answer, rebuff, hard words, contumely, unparliamentary language, personality, bear, bruin, brute, blackguard, beast, unlicked cub, frump, crosspatch, saucebox, crooked stick, grizzly, discourteous, uncourteous, uncourtly, ill-bred, ill-mannered, ill-behaved, ill-conditioned, unbred, unmannerly, unmannered, impolite, unpolite, unpolished, uncivilized, ungenteel, ungentleman-like, ungentlemanly, unladylike, blackguard, vulgar, dedecorous, foul- mouthed foul-spoken, abusive, uncivil, ungracious, unceremonious, cool, pert, forward, obtrusive, impudent, rude, saucy, precocious, repulsive, uncomplaisant, unaccommodating, unneighborly, ungallant, inaffable, ungentle, ungainly, rough, rugged, bluff, blunt, gruff, churlish, boorish, bearish, brutal, brusque, stern, harsh, austere, cavalier, taint, sour, crabbed, sharp, short, trenchant, sarcastic, biting, doggish, caustic, virulent, bitter, acrimonious, venomous, contumelious, snarling, surly, surly as a bear, perverse, grim, sullen, peevish, untactful, impolitic,
undiplomatic, artless, discourteously, with discourtesy, with a bad grace.