abstersion

noun

Archaic Definition:

the action or process of cleansing

Example:

Despite several abstersions, Thomas felt as if his hands were still covered in the blood of those he killed while under the lich’s control.

Personal Commentary:

I think this one’s on the list for the purpose of either aging your own diction for a npc, or to help with research. I’ve never seen it in a RPG product or reading material, but merriam-webster’s website says it’s usage dates to the 15th century.