Wu Collection, Lower Volume Radical: Cave (xué) Khangxi Strokes: 13 Page 866, Entry 37 Pronounced ke (level tone). Shuowen Jiezi (Explaining Graphs and Analyzing Characters) states it means empty; a hole in the ground is called a ke, while one in a tree is called a chao. Xiao Erya (Small Literary Expositor) states that the place where chickens and pheasants hatch their eggs is called a ke. Guangyun (Broad Rhymes) states that it refers to a den or a nest. Zuo Si's Shu Du Fu (Rhapsody on the Capital of Shu) mentions the Yong and Shu regions, where one dwells in the same nest as a myna bird.