Zi Collection, Page Position: Lower Radical: Mouth (kǒu) Page 89, Entry 14 According to the Extensive Dictionary of Sounds and Meanings (Guangyun) and the Collected Rimes (Jiyun), it is pronounced zuo. The Jade Encyclopedia (Yupian) explains: This refers to a sound. The Extensive Dictionary of Sounds and Meanings (Guangyun) explains: The sound produced when chirping. It is also written in a variant form (sou). Additionally, according to the Extensive Dictionary of Sounds and Meanings (Guangyun), it is pronounced zuo, and according to the Collected Rimes (Jiyun), it is pronounced jie, with the same pronunciation as zuo. The Extensive Dictionary of Sounds and Meanings (Guangyun) explains: Forceful zuo.