一切經音義 97.238

97.238

砮得砥（上怒都反下之耳反孔注尚書云砥細於礪石也砮中矢鏃丹朱類也文字典說並從石氏奴皆聲氏音是集作砥俗字也）。

"The arrowheads encounter whetstones" (砮得砥): The first character [砮 has the fanqie] nu + du (nu); the second character [砥 has the fanqie] zhi + er (zhi). Kong [Anguo]'s commentary on the Book of Documents says: 'Di (砥) is a whetstone finer than li (礪). Nu (砮) is suitable for arrowheads, a type of cinnabar-red stone.' The Wenzidian shuo states: 'Both have the stone radical (石), with shi (氏) and nu (奴) acting as phonetics.' 氏 is pronounced shi. The compiled text writes 砥, which is a vulgar character.