mercement means an amercement, a punishment. Lexicurio rates it Sui generis — a strength score of 87 out of 100.
Etymology
Either aphetic form of amercement; or borrowed independently from Anglo-Norman merciment, aphetic form of amerciment.
noun
- An amercement, a punishment.“Riȝt so is loue a ledere · and þe lawe shapeth / Vpon man for his mysdedes · þe merciment he taxeth.”