Un·der·go v. t. [imp. Underwent p. p. Undergone p. pr. & vb. n. Undergoing.]
 1. To go or move below or under. [Obs.]
 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.
    Certain to undergo like doom.   --Milton.
 3. To be the bearer of; to possess. [Obs.]
 Their virtues else, be they as pure as grace,
 As infinite as man may undergo.   --Shak.
 4. To undertake; to engage in; to hazard. [Obs.]
 I have moved already
 Some certain of the noblest-minded Romans
 To undergo with me an enterprise.   --Shak.
 5. To be subject or amenable to; to underlie. [Obs.]
    Claudio undergoes my challenge.   --Shak.

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