暂无解释，欢迎补充。

宋本廣韻

廣韻目次：入十五鎋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刹初鎋初黠開入聲黠開口二等山刪ʧʰatchrat／chat

方言集汇

◎ 粤语：cat3

English

weed or grass with narrow thick glades (as bamboo); water-pepper group