English Reference

Word

underwent

Phoneticsun·der·went

US/ˌəndɝˈwɛnt/

UK/ˌʌndəwˈɛnt/

Definition

v. to experience something, especially a change, a medical treatment, or a difficult process.

v. to experience or be subjected to something, typically a process that is unpleasant, necessary, or transformative. The past tense of 'undergo'.

Examples

“The old building underwent a complete renovation last year.”

“The patient underwent several tests before the doctors could confirm the diagnosis and start the treatment.”

“The aerospace industry underwent a period of rapid consolidation as smaller firms merged to survive the rising costs of research and development.”

Examples

simple

“The old building underwent a complete renovation last year.”

contextual

“The patient underwent several tests before the doctors could confirm the diagnosis and start the treatment.”

complex

“The aerospace industry underwent a period of rapid consolidation as smaller firms merged to survive the rising costs of research and development.”

Usage

Transitive verb — always takes a direct object. As the past tense form, it does not take an auxiliary 'did' in affirmative statements.

Pitfall

He was underwent surgery

He underwent surgery

Learners often treat 'underwent' as a passive participle; it is an active past tense verb.

Real-World Examples

“She underwent emergency brain surgery after the attack.”
Toronto Sun · 14 Aug 2026
“At the same time, the disc supplying material to the black hole underwent major changes.”
ScienceDaily · 31 Jul 2026

Collocations

underwent emergency

This entry

Level
B2 · Upper Intermediate
Frequency
Frequent
Updated

Scan code

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English Reference