Yupian (Yuankanben) Guangyun Jiyun Shiming Fangyan Erya Boya (according to Jiyun) Guangya (according to Jiyun)
id du Shuowen
Shuowen: volume 13b, page 293a.05 addition
radical:
488 𠠲(力) 甚聲
fanqie: 苦紺切 [kʰɒm]
this character is not in the Duanzhu