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From 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.] [1913 Webster] 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. [1913 Webster] Certain to undergo like doom. --Milton. [1913 Webster] 3. To be the bearer of; to possess. [Obs.] [1913 Webster] Their virtues else, be they as pure as grace, As infinite as man may undergo. --Shak. [1913 Webster] 4. To undertake; to engage in; to hazard. [Obs.] [1913 Webster] I have moved already Some certain of the noblest-minded Romans To undergo with me an enterprise. --Shak. [1913 Webster] 5. To be subject or amenable to; to underlie. [Obs.] [1913 Webster] Claudio undergoes my challenge. --Shak. [1913 Webster]