expression, godan verb (-su)
defile one's reputation; besmirch one's name
Used when someone's good name or honor is tarnished, often through scandal or disgraceful behavior.
そのスキャンダルで彼は名声を汚した。
That scandal defiled his reputation.
Compound of 名声 (reputation) + を (object marker) + 汚す (to defile).