一切經音義 80.83

80.83

丑砥（之耳反蒼頡篇從石作砥磨礪石也錄有作厎亦同）。

Choudi 丑砥 (zhi + er fan; the Cang Jie Pian writes it with the stone radical as 砥, meaning a whetstone; the catalogue sometimes writes it as 厎, which is the same).