adj.最真诚的,最虔诚的;
例句:
Imitation is the sincerest flattery.
模仿是最真诚的奉承.
We offer you our sincerest regrets for your misfortune.
我们为此感到痛惜.
Once again I convey my sincerest greetings on this auspicious occasion.
在这欢乐的节日里,请再次接受我诚挚的问候.