The Collaborative International Dictionary of English v.0.48:

Displease \Dis*please"\, v. t. [imp. & p. p. Displeased; p.
   pr. & vb. n. Displeasing.] [OF. desplaisir, whence F.
   d['e]plaisir displeasure; pref. des- (L. dis-) + plaisir to
   please. See Please, and cf. Displeasure.]
   1. To make not pleased; to excite a feeling of disapprobation
      or dislike in; to be disagreeable to; to offend; to vex;
      -- often followed by with or at. It usually expresses less
      than to anger, vex, irritate, or provoke.
      [1913 Webster]

            God was displeased with this thing.   --1 Chron.
                                                  xxi. 7.
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            Wilt thou be displeased at us forever? --Psalms
                                                  lxxxv. 5 (Bk.
                                                  of Com.
                                                  Prayer).
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            This virtuous plaster will displease
            Your tender sides.                    --J. Fletcher.
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            Adversity is so wholesome . . . why should we be
            displeased therewith?                 --Barrow.
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   2. To fail to satisfy; to miss of. [Obs.]
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            I shall displease my ends else.       --Beau. & Fl.

   Syn: To offend; disgust; vex; annoy; dissatisfy; chafe;
        anger; provoke; affront.
        [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Displeasing \Dis*pleas"ing\, a.
   Causing displeasure or dissatisfaction; offensive;
   disagreeable. -- Dis*pleas"ing*ly, adv. --
   Dis*pleas"ing*ness, n. --Locke.
   [1913 Webster]

WordNet (r) 3.0 (2006):

displeasing
    adj 1: causing displeasure or lacking pleasing qualities [ant:
           pleasing]