The Collaborative International Dictionary of English v.0.48:

Disparage \Dis*par"age\ (?; 48), v. t. [imp. & p. p.
   Disparaged; p. pr. & vb. n. Disparaging.] [OF.
   desparagier, F. d['e]parager, to marry unequally; pref. des-
   (L. dis-) + F. parage extraction, lineage, from L. par equal,
   peer. See Peer.]
   1. To match unequally; to degrade or dishonor by an unequal
      marriage. [Obs.]
      [1913 Webster]

            Alas! that any of my nation
            Should ever so foul disparaged be.    --Chaucer.
      [1913 Webster]

   2. To dishonor by a comparison with what is inferior; to
      lower in rank or estimation by actions or words; to speak
      slightingly of; to depreciate; to undervalue.
      [1913 Webster]

            Those forbidding appearances which sometimes
            disparage the actions of men sincerely pious. --Bp.
                                                  Atterbury.
      [1913 Webster]

            Thou durst not thus disparage glorious arms.
                                                  --Milton.

   Syn: To decry; depreciate; undervalue; underrate; cheapen;
        vilify; reproach; detract from; derogate from; degrade;
        debase. See Decry.
        [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Disparage \Dis"pa*rage`\, n.
   Inequality in marriage; marriage with an inferior. [Obs.]
   --Chaucer.
   [1913 Webster]

         Dissuaded her from such a disparage.     --Spenser.
   [1913 Webster]

WordNet (r) 3.0 (2006):

disparage
    v 1: express a negative opinion of; "She disparaged her
         student's efforts" [syn: disparage, belittle, pick
         at] [ant: blandish, flatter]