Wu Collection, Lower Volume Radical: Cave (xué) 窢 Kangxi Stroke Count: 13 Page 866, Entry 40 According to Collection of Rhymes (Jiyun), pronounced hua (entering tone). The sound of wind blowing against the current. Also pronounced xu (entering tone). Zhuangzi (Zhuangzi), Chapter: Under Heaven (Tianxia): Its wind is huan, how can it be described? Guo Commentary: The sound of wind blowing against the current, pronounced the same as xu.