Definition of undergo verb from the Oxford Advanced Learner's Dictionary



BrE BrE//ˌʌndəˈɡəʊ//
; NAmE NAmE//ˌʌndərˈɡoʊ//
Verb Forms present simple I / you / we / they undergo
BrE BrE//ˌʌndəˈɡəʊ//
; NAmE NAmE//ˌʌndərˈɡoʊ//
he / she / it undergoes
BrE BrE//ˌʌndəˈɡəʊz//
; NAmE NAmE//ˌʌndərˈɡoʊz//
past simple underwent
BrE BrE//ˌʌndəˈwent//
; NAmE NAmE//ˌʌndərˈwent//
past participle undergone
BrE BrE//ˌʌndəˈɡɒn//
; NAmE NAmE//ˌʌndərˈɡɔːn//
, NAmE//ˌʌndərˈɡɑːn//
-ing form undergoing
BrE BrE//ˌʌndəˈɡəʊɪŋ//
; NAmE NAmE//ˌʌndərˈɡoʊɪŋ//
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undergo something 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. The drug is currently undergoing trials in America. See related entries: Operations Word OriginOld English undergān ‘undermine’ (see under-, go).
See the Oxford Advanced American Dictionary entry: undergo