undergone
v. B2 Upper Intermediate US //ˌəndɝˈɡɔn// UK //ˌʌndəɡˈɒn// un·der·gone
v. to experience something, especially a change, a process, or a difficult treatment.
v. to experience or be subjected to a process, change, or unpleasant ordeal. The past participle of 'undergo'.
The old building has undergone many changes.
The patient has undergone several tests to determine the cause of the pain.
The city's infrastructure has undergone a massive transformation over the last decade, evolving from a manufacturing hub into a center for technological innovation.
Usage
The verb is transitive and typically used in the passive voice or with a process as the direct object.
Pitfall
The car has undergone by repairs.The car has undergone repairs.Undergo is a transitive verb and takes a direct object without a preposition.