Xu Collection, Middle Volume. Radical: Mound (fù). Character: yǔn. Kangxi stroke count: 12. Page 1346, Number 15. According to the Tang Rhymes (Tangyun), the pronunciation is derived from the fanqie characters yú and zhǔn. According to the Collected Rhymes (Jiyun), it is derived from the fanqie characters yǔ and zhǔn, sounding like yǐn. Explaining Graphs and Analyzing Characters (Shuowen Jiezi) defines it as high. Another definition describes it as stone. The Collected Rhymes also records a pronunciation derived from the fanqie characters cū and yuǎn, sounding like juàn. The Jade Chapters (Yupian) defines it as high and also identifies it as a place name. The Collected Rhymes records another pronunciation derived from the fanqie characters yú and zuì, sounding like yóu, with the same meaning. The Collected Rhymes further records a pronunciation derived from the fanqie characters yǐ and zhuǎn, sounding like yuǎn, which also means high. It is sometimes written in a variant form.