- To go or move below or under. - 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. - To be the bearer of; to possess. - To undertake; to engage in; to hazard. - To be subject or amenable to; to underlie.