a.

1. 天真的；幼稚的
   Peter was laughed at for his naive remarks.

   彼得因为讲了一些幼稚的话而被嘲笑。

2. 轻信的
   She's surely not so naive as to believe his story.

   她肯定不会轻信他编造的故事。

adj.

1. lacking experience, wisdom, or judgement.
2. natural and unaffected.
   ▸(of art) produced in a style which deliberately rejects sophisticated artistic techniques and has a bold directness resembling a child's work.