一切經音義 8.109

8.109

鑿丼（上音昨聲類鑿鏨也鏨紫陷反說文穿木也從金糳省聲也糳音作凡糳鑿業等字並從丵象竹木叢生也丵音𱭏學反下丼精郢反象形字也中一點象水今相傳去點作井也）。

Digging a well [鑿丼] (The first character has the sound zuo [昨]. The Shenglei says: "Zao [鑿] means a chisel [鏨]; zan has the fanqie zi + xian [紫陷反]." The Shuowen jiezi says: "To bore through wood; derived from metal [金] with the abbreviated phonetic zuo [糳]; zuo has the sound zuo [作]. All characters such as 糳, 鑿, and 業 derive from 丵, which depicts bamboo and trees growing densely; 丵 has the fanqie [...] + xue [𱭏學反]." The second character jing [丼] has the fanqie jing + ying [精郢反]; it is a pictographic character, with the dot in the middle depicting water. Nowadays it is traditionally written without the dot as 井).