Notes: Chen Collection, Middle Volume. Radical: Sun (rì). Kangxi stroke count: 16. Page 500, Entry 16. According to the Collection of Characters (Pianhai), pronounced yu. For the variant form: Tang Rhymes (Tangyun) and Zheng Rhymes (Zhengyun) record it as pronounced tan. Collected Rhymes (Jiyun) records it as pronounced tan. Explanation from the Explaining Graphs and Analyzing Characters (Shuowen): Dense, gathering clouds. Jade Chapter (Yupian) states: tan tan describes the appearance of dark clouds gathering thickly. Additionally, the Jade Chapter (Yupian) notes: In the Western Regions, the World Honored One is referred to as Qutan.