The Collaborative International Dictionary of English v.0.48:

Disesteem \Dis`es*teem"\, n.
   Want of esteem; low estimation, inclining to dislike;
   disfavor; disrepute.
   [1913 Webster]

         Disesteem and contempt of the public affairs. --Milton.
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The Collaborative International Dictionary of English v.0.48:

Disesteem \Dis`es*teem"\, v. t. [imp. & p. p. Disesteemed; p.
   pr. & vb. n. Disesteeming.]
   1. To feel an absence of esteem for; to regard with disfavor
      or slight contempt; to slight.
      [1913 Webster]

            But if this sacred gift you disesteem. --Denham.
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            Qualities which society does not disesteem. --Ld.
                                                  Lytton.
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   2. To deprive of esteem; to bring into disrepute; to cause to
      be regarded with disfavor. [Obs.]
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            What fables have you vexed, what truth redeemed,
            Antiquities searched, opinions disesteemed? --B.
                                                  Jonson.
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WordNet (r) 3.0 (2006):

disesteem
    n 1: the state in which esteem has been lost [ant: esteem,
         regard, respect]
    v 1: have little or no respect for; hold in contempt [syn:
         disrespect, disesteem] [ant: esteem, prise,
         prize, respect, value]