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”).
undergo (third-person singular simple present undergoes, present participle undergoing, simple past underwent, past participle undergone)
- (transitive, obsolete) To go or move under or beneath.
- (transitive) To experience; to pass through a phase.
2013 January 1, Paul Bartel, Ashli Moore, “Avian Migration: The Ultimate Red-Eye Flight”, in American Scientist, volume 101, number 1, page 47–48:
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.
- The project is undergoing great changes.
- (transitive) To suffer or endure; bear with.
- The victim underwent great trauma.
- She had to undergo surgery because of her broken leg.