Misericorde (weapon)
A misericorde ( or ; from French miséricorde, "mercy"; itself derived from the Latin misericordia, "act of mercy") was a long and narrow knife used during the High Middle Ages to deliver mercy killings to mortally wounded knights, as it was designed to be thin enough to strike through the gaps in their armour. The misericorde was used to dispatch knights who had received mortal wounds, which were not always quickly fatal in the age of bladed combat; it could also be used as a means of killing an active adversary, for example during a struggle.