Undergo, v. t. [imp. Underwent; p. p. Undergone; p. pr. & vb. n. Undergoing.]
Etymology: [AS. undergan. See Under, and Go.]
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.
1 more senses
5. To be subject or amenable to; to underlie. [Obs.] Claudio undergoes my challenge. Shak.
Shades of meaning
Fernald has no entry of its own for undergo; he lists it under endure.
He lists it without comment; the entries above explain its neighbors.