續一切經音義 9.121

9.121

或歍（下音烏切韻云以口相就也字書云從欠烏聲也律文從口作嗚謂嗚呼哀歎聲非歍唼義也）。

或歍 (The second character has the sound 烏 [wū]. The Qieyun states: 'To draw near to each other with the mouth.' The Zishu states: 'Derived from 欠 [qiàn] with 烏 [wū] as phonetic.' In the Vinaya text it is written with 口 as 嗚, which refers to the sound of weeping and lamentation (wūhū), not the meaning of 歍唼 [kissing/touching mouths].).