Wu Collection, Lower Volume Radical: Cave (xué) Stroke count: 15 Page 867, Entry 14 According to the Collection of Rhymes (Jiyun), pronounced diao. Meaning the appearance of being remote and deep. Also commonly written in the variant form tiao. In the Discourse on Rites (Xunzi), it says: to fill the great universe without being deep. The commentary notes that tiao is read as tiao, meaning deep appearance. In the Western Capital Rhapsody (Xijing Fu) by Zhang Heng, it says: looking at the deep and winding path. The commentary notes that it means deep and profound appearance. Also, according to the Expanded Rhymes (Guangyun), the Collection of Rhymes (Jiyun), the Rhyme Compendium (Yunhui), and the Correct Rhymes (Zhengyun), pronounced tiao. Also, according to the Expanded Rhymes (Guangyun), the Rhyme Compendium (Yunhui), and the Correct Rhymes (Zhengyun), pronounced tiao (rising tone). The meanings are the same.