go mad [crazy]; become insane [mad]
- 発狂した人
- 「an insane [a mentally deranged] person/a madman/a madwoman
- 発狂させる
- drive a person mad [crazy]
- 絶望のあまり彼は発狂した
- In an excess of despair he 「lost his reason [《口》 went off his head].
- 悲しみのあまり彼女は今にも発狂しそうだった
- Grief nearly drove her mad [out of her mind].