already finished
もう済んだことだ。
It's water under the bridge.
もう済んだよ
It's already done.
— コーカサスの虜 (1996)
ああでももう済んだんだ
Ah, but it's already done.
— AKIRA (1988)
もう済んだことです。
It's all in the past now.
もう済んだ事だろ
It's already over and done with, isn't it?
— ブエノスアイレス (1997)
おやもう済んだの?
Oh, you're done already?