undergo

Etymology

From Middle English undergon, from Old English undergān (“to undergo, undermine, ruin”), equivalent to under- + go. Cognate with Dutch ondergaan (“to undergo, perish, sink”), German untergehen (“to perish, sink, undergo”), Swedish undergå (“to undergo, go through”).

verb

1. (transitive) To experience; to pass through a phase.
   The project is undergoing great changes.
   Many of these classic methods are still used, with some modern improvements. For example, with the aid of special microphones and automated sound detection software, ornithologists recently reported […] that pine siskins (Spinus pinus) undergo an irregular, nomadic type of nocturnal migration. 2013-01-01, Paul Bartel, Ashli Moore, “Avian Migration: The Ultimate Red-Eye Flight”, in American Scientist, volume 101, number 1, archived from the original on 2016-03-05, pages 47–48
2. (transitive) To suffer or endure; bear with.
   The victim underwent great trauma.
   She had to undergo surgery because of her broken leg.
3. (transitive, obsolete) To go or move under or beneath.