mercy的形容詞形式翻譯前綴

I think her death was a merciful release.

我認為她的'死是一種幸運的解脱。

Eventually the session came to a merciful end.

這次開庭終於有了一個令人解脱的結果。

They asked her to be merciful to the prisoners.

他們要她對犯人慈悲為懷。