adj.顽皮的；淘气的；不妥的

His dog scared that naughty boy away. 他的狗把那个顽皮的孩子吓走了。

You naughty boy! I've told you not to play in the street. 你这顽皮孩子！我说过，叫你别在马路上玩。

This naughty boy is really troublesome. 这个淘气的男孩子真是惹人烦。

The naughty boy hid the books in the shrub. 这个淘气的孩子把书藏在了灌木丛里。

It was naughty of Father to stay out so late. 爸爸在外面待到很晚是不对的。