一切經音義 30.9

30.9

𣢑笑（齒之反說文𣢑頓戲笑貌也或作[山/虫]從欠㞢聲古文之字也經作[山/虫]亦通）。

𣢑笑 (Fanqie ch[i] + zh[i]. The Shuowen says: '𣢑 is the appearance of laughing and playing without restraint.' It is also written as [山/虫]. It derives from 欠 with 㞢 as phonetic; 㞢 is an ancient character for 之. In the sūtra it is written as [山/虫], which is also acceptable.)