Hai Collection, Upper Volume Radical: Horse (mǎ) Entry: shōu Kangxi Strokes: 20 Page 1442, Entry 14 Broad Rhymes (Guangyun), Collected Rhymes (Jiyun), and Collection of Rhymes (Yunhui) state it is pronounced sou. Broad Rhymes (Guangyun) defines it as a large horse from the border regions. It also means to search. Table of the Hundred Officials in the History of the Former Han (Qian Han Shu) mentions the Commander of the Grain Levy. The commentary states: It is like the word sou in the phrase for hunting. Sou means to search.