Definition of undergo verb from the Oxford Advanced American Dictionary

  

undergo

 verb
verb
NAmE//ˌʌndərˈɡoʊ//
 
undergo somethingVerb Forms present simple I / you / we / they undergo
 
he / she / it undergoes
 
past simple underwent
 
past participle undergone
 
,
 
-ing form undergoing
 
 
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to experience something, especially a change or something unpleasant to undergo tests/trials/repairs My mother underwent major surgery last year. Some children undergo a complete transformation when they become teenagers.
See the Oxford Advanced Learner's Dictionary entry: undergo