Wu Collection, Lower Volume Radical: Cave (xué) Yu Kangxi Strokes: 15 Page 867, Entry 18 Pronounced yu (rising tone). Explaining the character, it means filthy and low. It also refers to the hollow interior of a vessel. It further denotes illness, poor quality, and laziness. Records of the Grand Historian (Shiji), Annals of the Five Emperors: Vessels that are not rough or inferior. Also, Biographies of Money-makers (Huozhi Zhuan): Therefore, negligent and lazy. Xu Guang says: Zi-yu refers to being negligent and lazy. It also refers to being weak. Mei Cheng, Seven Stimuli (Qifa): Limbs are lazy and weak. Li Shan annotation: Yu means weak. It is also a place name. History of the Former Han (Qianhan Shu), Treatise on Geography: Shuofang Commandery contains Yuhun County. Also, Treatise on the Western Regions: The Kingdom of Kangju has five minor kings, the third of whom is the King of Yuni, who governs Yuni City. Classic of Mountains and Seas (Shanhaijing): The Fen River originates north of Shangyu and flows southwest into the Yellow River. It is also the name of a beast. Classic of Mountains and Seas (Shanhaijing): On Mount Shaoxian there is a Yazhu, and on Mount Xian there is a Heyu; both have human faces and animal bodies, and they eat people. Also, Supplement to the Collection of Characters (Zihui Bu): Pronounced yu (level tone). It is the name of a village in the territory of Jiang. It is also used interchangeably with yu. Erya, Explanation of Glosses (Shigu): Yu means weary and laborious. Annotation: Laborious people are mostly lazy and slack. Modern characters are sometimes written as yu. Also, Collected Rhymes (Jiyun): Identical to wa. Also pronounced wa (level tone). It refers to being filthy, wicked, and low. It is identical to wa.