pommel
https://gyazo.com/dea5763fbb037a0b4f0576d1bc6b4803
source: By Søren Niedziella from Denmark - [1], CC BY 2.0
noun
1. a rounded knob on the end of the handle of a sword, dagger, or old-fashioned gun.
柄頭(つかがしら)〘剣・刀の柄の先の丸い部分〙
2. the upward curving or projecting part of a saddle in front of the rider.
鞍頭(くらがしら), 前橋〘鞍の前部の突起部分〙
verb (pommels, pommeling, pommeled; British pommels, pommelling, pommelled)
another term for pummel.
…をこぶし[柄頭]で打つ
ORIGIN
Middle English (denoting a finial at the top of a tower): from Old French pomel, from a diminutive of Latin pomum ‘fruit, apple’.