1. 
[syn: disservice, ill service, ill turn]
The Collaborative International Dictionary of English v.0.48:
Disservice \Dis*serv"ice\, n. [Pref. dis- + service: cf. F.
   desservice.]
   Injury; mischief.
   [1913 Webster]
         We shall rather perform good offices unto truth than
         any disservice unto their relators.      --Sir T.
                                                  Browne.
   [1913 Webster]
WordNet (r) 3.0 (2006):
disservice
    n 1: an act intended to help that turns out badly; "he did them
         a disservice" [syn: disservice, ill service, ill
         turn] [ant: service]
Moby Thesaurus II by Grady Ward, 1.0:
19 Moby Thesaurus words for "disservice":
   atrocity, bad deed, bad turn, damage, disfavor, great wrong,
   grievance, gross injustice, harm, ill service, ill turn,
   imposition, injury, injustice, miscarriage of justice, outrage,
   raw deal, unkindness, wrong