dishonorable

from WordNet (r) 3.0 (2006)

dishonorable
    adj 1: lacking honor or integrity; deserving dishonor;
           "dishonorable in thought and deed" [syn: {dishonorable},
           {dishonourable}] [ant: {honorable}, {honourable}]
    2: deceptive or fraudulent; disposed to cheat or defraud or
       deceive [syn: {dishonest}, {dishonorable}] [ant: {honest},
       {honorable}]

from The Collaborative International Dictionary of English v.0.48

Dishonorable \Dis*hon"or*a*ble\, a. [Cf. F. d['e]shonorable.]
   1. Wanting in honor; not honorable; bringing or deserving
      dishonor; staining the character, and lessening the
      reputation; shameful; disgraceful; base.
      [1913 Webster]

   2. Wanting in honor or esteem; disesteemed.
      [1913 Webster]

            He that is dishonorable in riches, how much more in
            poverty!                              --Ecclus. x.
                                                  31.
      [1913 Webster]

            To find ourselves dishonorable graves. --Shak.
      -- {Dis*hon"or*a*ble*ness}, n. -- {Dis*hon"or*a*bly}, adv.
      [1913 Webster]

91 Moby Thesaurus words for "dishonorable": 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