Word

研鑽

研鑚、研さん
けんさん
diligent study; devoting oneself to one's studies
Word

切火

鑽火、切り火、鑽り火、鑚火、鑚り火
きりび
striking sparks with flint and steel or by rubbing sticks together (usu. to start a fire); fire lit by sparks from flint and steel, etc.; Shinto fire-purification ceremony
Word

鑽孔機

鑚孔機
さんこうき
boring machine; punching machine; perforator
Word

鑽る

鑚る
きる
to start a fire (with wood-wood friction or by striking metal against stone)