暂无解释，欢迎补充。

宋本廣韻

廣韻目次：去六至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棄詰利溪脂A開去聲寘開口三等止脂Akʰikhjiih／qih

方言集汇

◎ 粤语：hai1 hei3

English

◎ the buttocks; the rump; the sacrum， to set sideways， the male organ; (Cant。) vulgar term for the female sex organ