ignoble

ignoble adjective abject, base, baseborn, beggarly, below par, boorish, common, contemptible, corrupt, craven, debased, degenerate, degraded, depraved, despicable, discreditable, disgraceful, dishonest, dishonorable, disreputable, humble, ignominious, indecent, inferior, inglorious, inliberalis, insignificant, low, lowborn, lowly, mean, menial, of humble birth, of low character, of low extraction, of low station, peasant, plebian, proletarian, raffish, reproachful, scandalous, scrubby, scurrilous, servile, shameful, sorry, subaltern, unchivalrous, uncouth, uncultivated, underbred, unmanly, unrespectable, untitled, unworthy, vile, wicked, worthless

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See also: bad, calumnious, disgraceful, disreputable, immoral, machiavellian, nefarious, notorious, odious, offensive, outrageous, reprehensible, scandalous, sinister, unethical, unseemly