Fetching details from the dictionary...
abasement; fall; forfeiture; sinking (in people's estimation)
不祥事で信用が失墜した。
Credibility was lost due to the scandal.
権威の失墜を招く行為は慎むべきだ。
Actions that undermine authority should be avoided.
名声が失墜して再起が難しくなった。
With reputation lost, a comeback became difficult.