sincere

1. ADJ If you say that someone is sincere, you approve of them because they really mean the things they say. You can also describe someone's behaviour and beliefs as sincere. (指人) 真诚的; (指行为、信仰) 诚挚的[表赞许]

He's sincere in his views. 他的意见是诚恳的。

2. sincerityN-UNCOUNT 真诚; 诚挚

I was impressed with his deep sincerity. 让我铭记在心的是他深切的诚意。