The Silver Naginata (銀の薙刀 Gin no naginata) is a Naginata that is introduced in Fire Emblem Fates. Much stronger than its iron and steel counterparts, the Silver Naginata, apart from raising its wielder's Defense and Resistance by 1, reduces their Critical Evade and lowers their Strength and Skill post-battle.
The Silver Nageyari (銀の投撃薙刀 Gin no tōgeki naginata, lit. Silver Throwing Naginata) is the enemy-exclusive ranged variant of the Silver Naginata.
The naginata (薙刀), was a polearm used by samurai. It was essentially a spear with a curved blade. The naginata is one class of the Nihontō (日本刀), Japanese bladed weapons.
Nageyari (投槍) literally means "throwing spear," and the yari (槍), is also polearm that samurai used, which had a straight blade. This kind of weapon is also a class of Nihontō.