續一切經音義 3.201

3.201

幽邃（上於虬反切韻深也隱也爾雅曰幽深也說文從山𢆶聲𢆶音同上說文云微也下私醉反說文云邃深遠也古文又作㥞音訓同）。

Deep and secluded (幽邃: for the upper, yú + qiú [yōu]; the Qieyun says, "Deep; concealed." The Erya says, "幽 means deep." The Shuowen derives it from 山 with 𢆶 as phonetic. 𢆶 shares the same sound as above; the Shuowen says, "Subtle." For the lower, sī + zuì [suì]; the Shuowen says, "邃 means deep and distant." In ancient script it is also written as 㥞, with identical pronunciation and gloss).