under- + go

undergo is on the Academic Word List.

Word parts

change

Pronunciation

change

Plain form
undergo

Third-person singular
undergoes

Past tense
underwent

Past participle
undergone

Present participle
undergoing

  1. (transitive) If you undergo something, it happens to you; often it is not nice.
    The country has undergone great changes in the last decade.
    She had to undergo surgery because of her broken leg.
    The bridge is currently undergoing tests to see if it can be reopened.