un·der·go 
/ˌʌndɚˈgoʊ/ verb
un·der·goes; -went /-ˈwɛnt/ un·der·gone /ˌʌndɚˈgoʊ/ verb /-ˈgɑ:n/ un·der·go·ing [+ obj] : to experience or endure (something)
▪ She will have to undergo an operation. ▪ He underwent a personal transformation [=he became a different sort of person] after his heart attack.
▪ She will have to undergo an operation. ▪ He underwent a personal transformation [=he became a different sort of person] after his heart attack.
