Definition of "undergo"

undergo

/ˌʌndɚˈɡoʊ/

verb
third-person singular simple present undergoes, present participle undergoing, simple past underwent, past participle undergone
1. (transitive) To experience; to pass through a phase.
  Quotations
  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 January 1, Paul Bartel, Ashli Moore, “Avian Migration: The Ultimate Red-Eye Flight”, in American Scientist‎, volume 101, number 1, archived from the original on 5 March 2016, pages 47–48
2. (transitive) To suffer or endure; bear with.
3. (transitive, obsolete) To go or move under or beneath.