彼は長年にわたって同僚への怨恨を抱いていた。
He had harbored a grudge against his colleague for years.
警察は怨恨による犯行の可能性が高いとみている。
The police believe the crime was most likely motivated by a grudge.
両家の間の怨恨は三代にわたって続いた。
The enmity between the two families lasted three generations.