History of Swords: The Ancient Weapon - WAR DOCUMENTARY

Words sword originates from the Old English sweord, cognate to swert, Old Norse sverð, from a Proto-Indo-European root * swer- "to wound, to cut". Non-European tools called "sword" consist of single-edged devices such as the Center Eastern saif, the Chinese dao as well as the relevant Japanese katana. The Chinese jian is an instance of a non-European double-edged sword, like the European models stemmed from the double-edged Iron Age sword.