13. Suppose you're browsing a swords and medieval weapons shop and you spot a long, thin dagger with a plaque saying that it's called a 'mercygiver'. What on earth was a 'mercygiver' used for and why did it have such an odd name?
From Quiz Medieval Weaponry
Answer:
It was used to give the killing blow, called a mercygiver because it 'put him out of his misery'
Another name for this weapon is misericorde, derived from the Latin word 'misericordia', meaning mercy. In medieval times, warfare was bloody and brutal, and often a knight would receive a fatal wound, but it would take hours, or even days, of agony before he actually died. The mercygiver was thin enough to slip between cracks of armor to finish an enemy off immediately, saving him from a painful, lingering death.