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gun; firearm
wooden pole that wrestlers strike in practice
puffer fish
昔の鉄砲は今の銃と仕組みが違う。
Old guns have a different mechanism than modern ones.
鉄砲を撃つのは初めての経験だった。
It was my first experience shooting a gun.
祖父は若い頃、鉄砲で狩りをしていた。
My grandfather used to hunt with a rifle when he was young.