Yupian (Yuankanben) Guangyun Jiyun Shiming Fangyan Erya Boya (according to Jiyun) Guangya (according to Jiyun)
id du Shuowen
Shuowen: volume 07b, page 158a.12 addition
radical:
279 思聲
fanqie: 息兹切 [sĭə]
this character is not in the Duanzhu