一切經音義 35.72

35.72

牙頷（上雅加反說文云壯齒也象上下相錯之形本篆文作[?/爿]今𥛬書作牙下含感反上聲字經作頷俗字也說文云頤頷也古文本從函音含從頁作顄或作顄皆古字也今且從俗）。

Molars and jaw (The first character is yǎ + jiā fanqie. The Shuowen says: 'Strong teeth.' It depicts the shape of upper and lower teeth interlocking. Originally in seal script it was written as [?/爿], and now in clerical script it is written as 牙. The second character is hán + gǎn fanqie, in the rising tone. In the sūtra it is written as 頷, which is a vulgar character. The Shuowen says: 'The chin and jaw.' The ancient text originally took hán, pronounced hán, with 'head' as 顄, or written as 顄; these are ancient characters. For now, we follow vulgar usage).