The Collaborative International Dictionary of English v.0.48:

Disgusting \Dis*gust"ing\, a.
   That causes disgust; sickening; offensive; revolting. --
   Dis*gust"ing*ly, adv.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Disgust \Dis*gust"\, v. t. [imp. & p. p. Disgusted; p. pr. &
   vb. n. Disgusting.] [OF. desgouster, F. d['e]go[^u]ter;
   pref. des- (L. dis-) + gouster to taste, F. go[^u]ter, fr. L.
   gustare, fr. gustus taste. See Gust to taste.]
   To provoke disgust or strong distaste in; to cause (any one)
   loathing, as of the stomach; to excite aversion in; to offend
   the moral taste of; -- often with at, with, or by.
   [1913 Webster]

         To disgust him with the world and its vanities.
                                                  --Prescott.
   [1913 Webster]

         [AE]rius is expressly declared . . . to have been
         disgusted at failing.                    --J. H.
                                                  Newman.
   [1913 Webster]

         Alarmed and disgusted by the proceedings of the
         convention.                              --Macaulay.
   [1913 Webster]

WordNet (r) 3.0 (2006):

disgusting
    adj 1: highly offensive; arousing aversion or disgust; "a
           disgusting smell"; "distasteful language"; "a loathsome
           disease"; "the idea of eating meat is repellent to me";
           "revolting food"; "a wicked stench" [syn: disgusting,
           disgustful, distasteful, foul, loathly,
           loathsome, repellent, repellant, repelling,
           revolting, skanky, wicked, yucky]