Xu Collection, Middle Volume Radical: Mound (fù) 陻 Kangxi Strokes: 17 Page Number: 1355, entry 13 Guangyun (Guǎngyùn) gives the pronunciation yù zhēn qiè. Jiyun (Jíyùn), Yunhui (Yùnhuì), and Zhengyun (Zhèngyùn) give the pronunciation yī zhēn qiè, sounding like yīn. Yupian (Yùpiān) defines it as 'to block' or 'to stop up'. In the 'Great Plan' chapter of the Book of Documents (Shūjīng), it states: 'Gun blocked the great flood'. Guangyun (Guǎngyùn) notes its original form was 垔 (yīn). It is also written as 堙 (yīn). Pianhai (Piānhǎi) also lists another variant form.