暂无解释，欢迎补充。

宋本廣韻

廣韻目次：入三十怗小韻反切聲母韻母聲調平水韻等呼韻部韻攝罗马字国际音标浹子協精怗入聲葉開口四等添咸cep／zeptsiep

方言集汇

◎ 粤语：gap3 tiu5 zaau1 zip3

English

fragments of a tile haven't t been kiln-dried completely， tiles overlapping