一切經音義 12.206

12.206

窪曲（烏瓜反或作窊洼三體同經從雨作𩂡誤也韻詮云下濕地說文從穴洼聲也或作凹俗字也）。

窪曲 (concave and curved): 窪 is *wā* (烏瓜反 [ʔwa]); also written as 窊 or 洼, the three forms being identical. The sūtra writes it with the rain radical as 𩂡, which is an error. The *Yunquan* says: "Low-lying damp ground." The *Shuowen* says: "It takes the cave radical with 洼 as its phonetic." It is also written as 凹, a vulgar character.