/ˌʌndəˈgəʊ ||; ˌʌndɚˈgo/verb [T] (past tense underwent /-ˈwent ||; -ˈwɛnt/ past participle undergone /-ˈgɒn; US -ˈgɔ:n ||; -ˈgɔn/) to have a difficult or unpleasant experience 经历，经受（困难或不快的事）: She underwent a five-hour operation. 她接受了五小时的手术。