The Collaborative International Dictionary of English v.0.48:

Stomach \Stom"ach\, v. t. [imp. & p. p. Stomached; p. pr. &
   vb. n. Stomaching.] [Cf. L. stomachari, v.t. & i., to be
   angry or vexed at a thing.]
   1. To resent; to remember with anger; to dislike. --Shak.
      [1913 Webster]

            The lion began to show his teeth, and to stomach the
            affront.                              --L'Estrange.
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            The Parliament sit in that body . . . to be his
            counselors and dictators, though he stomach it.
                                                  --Milton.
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   2. To bear without repugnance; to brook. [Colloq.]
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The Collaborative International Dictionary of English v.0.48:

Stomaching \Stom"ach*ing\, n.
   Resentment. [Obs.]
   [1913 Webster]