形容词
1. 诚恳的;真挚的;真诚的
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 .
1. characterized by a firm and humorless belief in the validity of your opinions
e.g. both sides were deeply in earnest, even passionate
an entirely sincere and cruel tyrant
a film with a solemn social message
2. open and genuine
not deceitful
e.g. he was a good man, decent and sincere
felt sincere regret that they were leaving
sincere friendship