Chou Collection, Upper Volume
Radical: Mouth (kǒu)
Character: yi
Kangxi strokes: 9
Page 186, Entry 08
Pronounced yi.
According to the Explaining Graphs and Analyzing Characters (Shuowen), in the Nanyang region, calling out in a loud voice is called yi. Also, according to the Jade Compendium (Yupian), it describes the appearance of laughing.
Pronounced shi.
Pronounced jie. The meaning is the same.