Chou Collection, Upper Volume
Radical: Mouth (kǒu)
Character: sou
Kangxi Stroke Count: 14
Page 204, Entry 28
Guangyun, Jiyun, Yunhui, and Zhengyun state it is pronounced sou.
Shuowen Jiezi: The sound used to command a dog.
Yupian: According to the Dialects (Fangyan), in the regions of Qin, Jin, Ji, and Long, to command a dog is called sou.
Zuo Commentary to the Spring and Autumn Annals (Zuozhuan), Year 2 of Duke Xuan: The Duke commanded his mastiff.
Sub-commentary: Fu Qian says, sou means to command.
Explanatory Text: Sou, pronounced su. Fu's original text uses the character written with a sun radical. Guangyun agrees.
Also, according to the Tangyun it is pronounced sou, and according to Jiyun, Yunhui, and Zhengyun it is pronounced sou. It is sometimes written in a variant form.
Also, according to Guangyun it is pronounced cou, and according to Jiyun it is pronounced cou. It is sometimes written in a variant form.
Also, according to Jiyun it is pronounced wo.
Also, according to Jiyun and Leipian it is pronounced sou. It is sometimes written in a variant form.
Also, according to Jiyun it is pronounced zu. It is sometimes written in a variant form, with the same meaning.