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.