godan verb (-ru), intransitive verb
fall in status; be degraded; come down in the world
Describes a person's decline from a higher social, economic, or moral position to a lower one. Often carries a sense of disgrace or ruin.
彼はギャンブルで身を持ち崩し、すっかり成り下がってしまった。
He ruined himself through gambling and fell completely in the world.
かつての名門
The once-prestigious school has now fallen so low as to become a hangout for delinquents.