一切經音義 6.197

6.197

深奧（上傷任反考聲云深不可測也說文云從水𥥍聲也下烏告反爾雅云西南隅謂之奧說文云奧亦㴱也從釆白慢反從大作奧也）。

Deep and profound (深奧: for the first character, the fanqie is 傷任 [shēn]. The Kaosheng says: 'So deep it cannot be measured.' The Shuowen says: 'It takes radical 水 with 𥥍 as phonetic.' For the second character, the fanqie is 烏告 [ào]. The Erya says: 'The southwest corner is called 奧.' The Shuowen says: '奧 also means deep. It takes radical 釆 [biàn] and 大, written 奧').