Synonyms and related words :
amoral, bent, blue, bosky, broad, clouded, conscienceless, corrupt, corrupted, criminal, crooked, curtained, dark, darkling, derogatory, devious, discreditable, disgraceful, dishonest, dishonorable, disreputable, doubtful, dubious, dusky, equivocal, evasive, felonious, fishy, fraudulent, ignoble, ignominious, ill-got, ill-gotten, immoral, indecisive, indefinite, indirect, indistinct, infamous, inglorious, insidious, not kosher, notorious, obumbrate, obumbrated, off-color, overshaded, overshadowed, penumbral, purple, questionable, racy, rotten, salty, screened, seamy, shabby, shaded, shadow, shadowy, shameful, shameless, sheltered, shifty, shoddy, sinister, slippery, sordid, spicy, suggestive, suspect, suspicious, tricky, umbral, uncertain, unconscienced, unconscientious, unconscionable, undecided, underhand, underhanded, unethical, unpraiseworthy, unprincipled, unreliable, unrespectable, unsavory, unscrupulous, unstraightforward, veiled, wicked, without remorse, without shame