ㄓㄥˋzhèngㄧㄢˊyánㄌㄧˋㄙㄜˋ

  1. 言辭鄭重神情嚴厲紅樓夢·第一》:他說鄭重正言厲色。」文明小史·》:往時見人便正言厲色表兄也是如此益發動氣。」正言厲顏」。謔浪調笑

solemn in word and countenance (idiom)​; strict and unsmiling, also written 正顏厲色