Si Collection, Middle Volume Radical: Fire (huǒ) Yu Kangxi Strokes: 17 Page 684, Entry 18 Ancient form: Yan Broad Rhymes (Guangyun): Pronounced yu (entering tone) Rhyme Collection (Jiyun), Rhyme Gathering (Yunhui), Standard Rhymes (Zhengyun): Pronounced yu (entering tone) Analytical Dictionary of Characters (Shuowen): Heat within. Approaching Refinement (Erya): Explaining Words: Yu means warm. Commentary: In the Jiangdong region today, it is commonly referred to as yu. Book of Documents (Shangshu), Great Plan (Hongfan): Speaking of heat and cold. History of the Former Han (Qian Hanshu), Biography of Wang Bao: Not suffering from the stifling heat of midsummer. Also commonly written in a variant form (ao). Book of Odes (Shijing), Tang Odes: Not as good as your clothing, peaceful and warm. Commentary: Ao was originally also written as yu. Also in the Minor Odes (Xiaoya): The sun and moon are now warm. Book of Rites (Liji), Inner Chapters (Neize): Asking about clothing being warm or cold. Commentary: Yu was originally also written as ao. Note: In the Treatise on the Five Phases in the History of the Han, as well as the biographies of Li Xun and Wang Mang, yu is always written as ao. Also the same as ao (deep and warm place). Book of Documents (Shangshu), Canon of Yao: Their people are warm. Records of the Grand Historian (Shiji), Annals of Yao: Written as their people are yu. Rhyme Collection (Jiyun): Sometimes written as [variant]. Tang Rhymes (Tangyun): Pronounced ao (falling tone) Rhyme Collection (Jiyun), Rhyme Gathering (Yunhui), Standard Rhymes (Zhengyun): Pronounced ao (falling tone) Meaning is the same. Broad Rhymes (Guangyun): To heat a pot by adding water to it. Rhyme Collection (Jiyun): Pronounced yu (falling tone) Yuxiu: A sound of pained concern. Sometimes written as ou. Rhyme Collection (Jiyun), Classified Chapters (Leipian): Pronounced you (level tone) Meaning is the same. Zuo Tradition (Zuozhuan), Third Year of Duke Zhao: The people are in pain and suffering, and some express pained concern for them. Commentary: Yuxiu is the sound of pained concern. Sub-commentary: Yu means deep, Xiu means beautiful. Note: In the Explanation of Sounds (Shiwen), Xiu is pronounced xu (falling tone), and Yu is pronounced yu (level tone). It is also pronounced ao (falling tone), and yu (entering tone). All three pronunciations are acceptable. Rhyme Collection (Jiyun): Sometimes also written as ao. Broad Rhymes (Guangyun), Rhyme Collection (Jiyun): Pronounced ao (rising tone) Broad Rhymes (Guangyun): Extremely hot. Textual Research: History of the Former Han, Biography of Wang Bao: Not as good as the stifling heat of midsummer. According to the original text, corrected from not suffering to not as good as.