A thin-bladed dagger; so called, in the Middle Ages, because used to give the death wound or "mercy" stroke to a fallen adversary.

An indulgence as to food or dress granted to a member of a religious order.

from the Latin misericordia, meaning pity or mercy. The term is used to refer either to the meat-kitchen of the monastic infirmary, where a special diet was prepared for the infirm, or for the hinged seats in the stalls of the monastic choir, which were provided in order to support the nuns or monks in their long religious offices

An amercement.