unholy

from WordNet (r) 3.0 (2006)

unholy
    adj 1: not hallowed or consecrated [syn: {unholy}, {unhallowed}]
           [ant: {holy}]
    2: extremely evil or cruel; expressive of cruelty or befitting
       hell; "something demonic in him--something that could be
       cruel"; "fires lit up a diabolic scene"; "diabolical
       sorcerers under the influence of devils"; "a fiendish
       despot"; "hellish torture"; "infernal instruments of war";
       "satanic cruelty"; "unholy grimaces" [syn: {demonic},
       {diabolic}, {diabolical}, {fiendish}, {hellish}, {infernal},
       {satanic}, {unholy}]
    3: having committed unrighteous acts; "a sinful person" [syn:
       {sinful}, {unholy}, {wicked}]

from The Collaborative International Dictionary of English v.0.48

unholy \un*ho"ly\ ([u^]n*h[=o]"l[y^]), a.
   Not holy; unhallowed; not consecrated; hence, profane;
   wicked; impious. -- {un*ho"li*ly}, adv. -- {un*ho"li*ness},
   n.
   [1913 Webster]

from Moby Thesaurus II by Grady Ward, 1.0

35 Moby Thesaurus words for "unholy":
      amiss, barbarous, blamable, blameful, censurable, culpable,
      fleshly, godless, guilty, impious, irreligious, irreverent,
      mundane, nonsacred, profane, reprehensible, reprobate, secular,
      sinful, temporal, un-Christly, unangelic, unblessed, unchristian,
      uncivilized, unconscionable, ungodly, unhallowed, unregenerate,
      unrighteous, unsacred, unsaintly, unsanctified, wicked, worldly