Wu Collection, Lower Volume Radical: Cave (xué) Su Kangxi strokes: 13 Page 866, Entry 42 Tang Rhyme (Tangyun), Collection Rhymes (Jiyun), Rhyme Meetings (Yunhui), and Orthodox Rhymes (Zhengyun): Pronounced zu (falling tone). Shuowen Jiezi (Shuowen): To emerge suddenly from a hole. Also, bosu, describing slow movement. Sima Xiangru, Rhapsody of Sir Fantasy (Zixu Fu): Moving slowly and laboriously up the golden embankment. Commentary: Bosu means to crawl or creep along. Also, xisu, an unstable sound. Du Fu: The river bridge is fortunately not yet demolished, yet it creaks with a rustling sound. Also, in Buddhist texts: stupa (sutubuo). Commentary: A pagoda. Also, Collection Rhymes (Jiyun): Pronounced cu (falling tone). Same meaning. Textual research: In the entry for Buddhist texts, it reads stupa. Commentary: A pagoda. Note: The Sanskrit term for a pagoda is stupa. The character bo has been corrected to bo.