一切經音義 3.121

3.121

溝坑（上古侯反周禮云通水曰溝桂苑珠叢云邑中之瀆通水也說文水瀆廣深各四尺從水冓聲也冓音古侯反下苦耕反爾雅坑墟也郭璞注云塹池丘墟也蒼頡篇壑也陷也說文闕訓古今正字從土亢聲也亢音岡）。

溝坑 (Ditch and pit: The upper character has the fanqie 古侯 [gōu]. The Zhouli says: 'Water channels are called 溝.' The Guiyuan zhuchong says: 'A canal within a city that allows water to flow.' The Shuowen jiezi says: 'A water conduit four feet wide and four feet deep; derived from 水 [water] with the sound 冓. 冓 has the fanqie 古侯 [gōu].' The lower character has the fanqie 苦耕 [kēng]. The Erya says: '坑 means ruins.' Guo Pu's commentary says: 'Moats, ponds, mounds, and ruins.' The Cangjie pian says: 'A chasm, a pitfall.' The Shuowen jiezi omits its gloss. The Gujin zhengzi derives it from 土 [earth] with the sound 亢. 亢 has the sound 岡 [gāng]).