Stiletto is an Italian word that means a dagger in translation. It is a knife with a long, narrow, tapered blade. Such knives have been used in Italy since the 16th century. Their other nickname is Misericordia (mercy). In the past, they served as a stabbing weapon. Thanks to the shape of their blade, they could easily cause severe internal injury, leaving little external marks. Russian mafia is said to use stiletto knives as a weapon of revenge.