Xu Collection, Upper Volume Radical: Metal (jīn) 鏃 Kangxi stroke count: 19 Page 1319, Entry 14 Tang Dynasty Rhymes (Tangyun), Collected Rhymes (Jiyun), and Rhyme Compendium (Yunhui) define it as pronounced zu. Explaining Graphs and Analyzing Characters (Shuowen) defines it as sharp. Jade Chapters (Yupian) defines it as an arrowhead. Book of Documents (Shujing), Yu Tribute (Yu Gong) chapter, in the passage regarding whetstones, fine whetstones, arrowhead stones, and cinnabar, the commentary states that arrowheads are stones used for arrow tips. Explanation of Text (Shiwen) notes it is pronounced zu. Jia Yi's Faults of Qin (Guo Qin Lun) mentions that the Qin state did not expend a single arrow or arrowhead. Collected Rhymes (Jiyun) notes it is also written in a variant form (tie). Also, per Collected Rhymes (Jiyun) and Correct Rhymes (Zhengyun), it is pronounced cu. Also, per Collected Rhymes (Jiyun), it is pronounced zhuo. Also, pronounced cou. The meaning is the same. Also, per Collected Rhymes (Jiyun), it is pronounced zu. It is the same as the character for file (cuo). Also, per Collected Rhymes (Jiyun), it is pronounced chuo. It means to hoe. A proverb says: If you wish to obtain grain, sharpen it like a horse's ear. Jia Sixie states: It is sometimes also written in a variant form (zhuo).