Si Collection, Middle Volume Radical: Fire (huǒ) Ku Kangxi strokes: 11 Page 672, Entry 16 Tang Dynasty Rhymes (Tangyun): Pronounced ku. Collected Rhymes (Jiyun): Pronounced ku. Pronounced ku. Explanation of Graphs (Shuowen): Dry heat. Extended Rhymes (Guangyun): Hot air. Also, Jade Chapters (Yupian): Pronounced kao. Collected Rhymes (Jiyun): Pronounced kao. Pronounced kao. Meaning is the same. Collected Rhymes (Jiyun): Originally written as kao.