續一切經音義 2.185

2.185

歰滑（上色立反韻英云不通也說文云不滑也從四止二正二倒作歰經文從三止作澁脫略也下尸八反切韻利也從水骨聲也）。

歰滑 (The first character is pronounced 色 + 立 fanqie. The Yunying says: 'Impassable.' The Shuowen jiezi says: 'Not smooth.' It is written with four 止 characters, two upright and two inverted, forming 歰. In the sūtra text, writing it with three 止 as 澁 is an omission. The second character is pronounced 尸 + 八 fanqie. The Qieyun says: 'Smooth, slippery.' It takes 水 as semantic and 骨 as phonetic).