Wu Collection, Lower Volume Radical: Cave (xué) 竁 Kangxi strokes: 17 Page 868, Entry 33 Collected Rimes (Jiyun) and Treasury of Rimes (Yunhui) state: Pronounced cui (falling tone). Shuowen Jiezi states: To dig into the earth. Another definition is a small sound. Rites of Zhou (Zhouli), Earth Offices: Divination for burial sites, establishing the main pit (sui). Commentary: This refers to the initial digging of the cave. Master Zheng reads it as the tone for digging. Du Zichun reads it as cui. Poetry by Yan Yannian: The moon caves (sui) to welcome guests. Commentary: This means a hole or den. Also, Wide Rimes (Guangyun) and Collected Rimes (Jiyun) state: Pronounced cui (falling tone). Also, Wide Rimes (Guangyun) states: Pronounced chuan (falling tone). Collected Rimes (Jiyun) states: Pronounced chuan (falling tone). Also, Collected Rimes (Jiyun) states: Pronounced xue (entering tone). The meaning is the same. Also, Wide Rimes (Guangyun) states: Pronounced chui (falling tone). To dig a grave pit. Also, Collected Rimes (Jiyun) states: Pronounced chuan (level tone). The meaning is the same.