一切經音義 41.40

41.40

洄澓（上音回經文作古文[?回]字雖是正時所不用尒雅逆流而上曰泝洄郭璞曰旋流者也下音復或作洑亦水之回旋也說文從水復聲也）。

Swirling vortex (洄澓: the first character is pronounced 回 [huí]. The sūtra text uses the ancient character [?回], which, although correct, is not used in modern times. The Erya says: "Going up against the current is called 泝洄." Guo Pu says: "A whirlpool." The second character is pronounced 復 [fù]; it is also written 洑, also meaning a swirling of water. The Shuowen derives it from 水 with 復 as phonetic).