1. (a.) Wanting in honor; not honorable; bringing or deserving dishonor; staining the character, and lessening the reputation; shameful; disgraceful; base.

2. (a.) Wanting in honor or esteem; disesteemed.

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