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Definition of undergo:

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


be (caught/stuck) between a rock and a hard place, know, support, submit to, be subject to, allow, not know where/which way to turn, sustain, incur, participate, receive, meet with, get, witness, come under, be in dire/desperate straits, go through, taste, see, experience, encounter, take, permit, pass, brook, share, run up against, bear with, submit, be in the grip of something, afford, withstand, be reared on something, prove, know, have, bear up under.

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