内うち竹だけ

noun

inner bamboo layer of a bow

Specialized term used in traditional Japanese archery (kyūdō) and bow-making. Refers to the bamboo piece on the inner side (belly) of a composite bow.

• 弓ゆみの内うち竹だけは、矢やを放はなつときに大おおきな圧あっ縮しゅく力りょくを受うける。

  The inner bamboo layer of the bow receives great compressive force when the arrow is released.