The same system was used for ransoming or exchanging captives.
同一系统也被用来赎回或交换俘虏。
《柯林斯英汉双解大词典》
2
We have to recover from some poison, need saving, ransoming.
我们需要消毒，需要治疗，需要救赎。
3
The proximate rewards included booty from looting bodies, ransacking captured towns and castles, selling the armor and weapons of the dead, and ransoming high-ranking prisoners.