Synonyms and related words :
amoral, bad, base, conscienceless, contemptible, corrupt, corrupted, criminal, crooked, dark, debased, degrading, derogatory, despicable, devious, dirty, discreditable, disgraceful, dishonest, disloyal, disreputable, doubtful, dubious, duplicitous, evasive, evil, faithless, felonious, filthy, fishy, flagrant, foul, fraudulent, heinous, hypocritical, ignoble, ignominious, ill-got, ill-gotten, immoral, improper, indirect, infamous, inglorious, insidious, low, mean, not kosher, notorious, objectionable, outrageous, perfidious, questionable, reprehensible, rotten, seamy, shabby, shady, shameful, shameless, shaming, shifty, shoddy, sinister, slippery, sordid, suspicious, traitorous, treacherous, tricky, two-faced, unbecoming, unconscienced, unconscientious, unconscionable, underhand, underhanded, unethical, unfaithful, unpraiseworthy, unprincipled, unrespectable, unsavory, unscrupulous, unseemly, unstraightforward, untrustworthy, unworthy, vile, without remorse, without shame