Zi Collection, Page Position: Upper, Radical: Mouth (kǒu), Page 11, Entry 02 The character is pronounced xi (falling tone). "Suān tòng" means pain. Also, "Guǎngyùn" (Guangyun) explains it as illness. Additionally, "Jíyùn" (Jiyun) explains it with the pronunciation sī (entering tone), meaning the same.