childish

柯林斯词典

1. ADJ Childish means relating to or typical of a child. 孩子的; 孩子特有的
...childish enthusiasm. …孩子特有的熱情。
2. ADJ If you describe someone, especially an adult, as childish, you disapprove of them because they behave in an immature way. 幼稚的[表不滿]
...Penny's selfish and childish behaviour. …珮尼自私而幼稚的行爲。

How very childish of her to refuse to speak to me!
I've had enough of your childish pranks .
"Stop this childish nonsense at once !" he shouted furiously .
Don't be so childish - just give me the keys and stop messing about.
She said we should be ashamed of our childish behaviour - fighting over who got the last strawberry .