晩ばん節せつを汚けがす

expression, godan verb (-su)

ruin one's reputation in later life; tarnish one's twilight years

Idiomatic expression used when someone who has led a respectable life commits a disgraceful act in old age, damaging their legacy.

• あの政せい治じ家かは晩ばん節せつを汚けがしてしまった。

  That politician ruined his reputation in his later years.

• 晩ばん節せつを汚けがさないように気きをつけたい。

  I want to be careful not to tarnish my twilight years.