Chou Collection, Upper Volume Radical: Mouth (kǒu) 吐 Kangxi strokes: 6 Page 176, Entry 03 Tang Rhymes (Tangyun) and Correct Rhymes (Zhengyun) pronounce this tu (rising tone). Collected Rhymes (Jiyun) and Rhyme Compendium (Yunhui) also pronounce this tu (rising tone). Shuowen Jiezi (Shuowen): To write out. Jade Chapters (Yupian): To spit from the mouth. Book of Odes (Shijing), Great Odes (Daya): If soft, then swallow it; if hard, then spit it out. Zuo Commentary (Zuozhuan), Year 6 of Duke Xi: If Jin takes Yu and offers fragrant incense through virtuous conduct, will the spirits spit it out? Records of the Grand Historian (Shiji), House of Lu: Duke of Zhou would pause his meal three times to spit out his food to receive visitors. Also, Extended Rhymes (Zengyun): To emerge, to express. History of the Former Han (Qianhan), Biography of Liu Xiang: To issue a bright edict and express virtuous words. Book of Tang (Tangshu), Biography of Fang Guan: His speech and expression were brilliant and smooth. Also a surname. Standard Character Guide (Zhengzitong): During the Sui dynasty, there was General Tuwan Xu. Also a double-surname; during the Later Wei dynasty, there were the Tuxi, Tunan, and Tuwan clans. Also, Extensive Rhymes (Guangyun) and other sources pronounce this tu (falling tone). Extensive Rhymes (Guangyun): To vomit.