一切經音義 58.347

58.347

水竇（徒遘反考工記竇高三尺注云宮中水道也說文竇空也謂孔穴也）。

水竇 [water drain] (Tú + gòu fanqie. The Kaogongji states: "A drain is three feet high." The commentary states: "It is a water channel in a palace." The Shuowen jiezi states: "Dòu means a hollow, referring to a hole or opening").