暂无解释，欢迎补充。

宋本廣韻

廣韻目次：上平十五灰小韻反切聲母韻母聲調平水韻等呼韻攝韻部国际音标罗马字灰呼恢曉灰平聲灰合口一等蟹灰xuɒihuai／xuoi

方言集汇

◎ 粤语：fui1

English

to suffer a stroke of paralysis or apoplexy， disease of the private part (of the human body)