The Collaborative International Dictionary of English v.0.48:

Discountenance \Dis*coun"te*nance\, n.
   Unfavorable aspect; unfriendly regard; cold treatment;
   disapprobation; whatever tends to check or discourage.
   [1913 Webster]

         He thought a little discountenance on those persons
         would suppress that spirit.              --Clarendon.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Discountenance \Dis*coun"te*nance\, v. t. [imp. & p. p.
   Discountenanced; p. pr. & vb. n. Discountenancing.]
   [Pref. dis- + countenance: cf. OF. descontenancer, F.
   d['e]contenancer.]
   1. To ruffle or discompose the countenance of; to put of
      countenance; to put to shame; to abash.
      [1913 Webster]

            How would one look from his majestic brow . . .
            Discountenance her despised!          --Milton.
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            The hermit was somewhat discountenanced by this
            observation.                          --Sir W.
                                                  Scott.
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   2. To refuse to countenance, or give the support of one's
      approval to; to give one's influence against; to restrain
      by cold treatment; to discourage.
      [1913 Webster]

            A town meeting was convened to discountenance riot.
                                                  --Bancroft.
      [1913 Webster]

WordNet (r) 3.0 (2006):

discountenance
    v 1: look with disfavor on; "The republic soon discountenanced
         its few friends"
    2: show disapproval by discouraging; "any measure tending to
       fuse invalids into a class with special privileges should be
       discountenanced"