The Collaborative International Dictionary of English v.0.48:

Undergo \Un`der*go"\, v. t. [imp. Underwent; p. p. Undergone
   (?; 115); p. pr. & vb. n. Undergoing.] [AS. underg[=a]n.
   See Under, and Go.]
   1. To go or move below or under. [Obs.]
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   2. To be subjected to; to bear up against; to pass through;
      to endure; to suffer; to sustain; as, to undergo toil and
      fatigue; to undergo pain, grief, or anxiety; to undergothe
      operation of amputation; food in the stomach undergoes the
      process of digestion.
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            Certain to undergo like doom.         --Milton.
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   3. To be the bearer of; to possess. [Obs.]
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            Their virtues else, be they as pure as grace,
            As infinite as man may undergo.       --Shak.
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   4. To undertake; to engage in; to hazard. [Obs.]
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            I have moved already
            Some certain of the noblest-minded Romans
            To undergo with me an enterprise.     --Shak.
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   5. To be subject or amenable to; to underlie. [Obs.]
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            Claudio undergoes my challenge.       --Shak.
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