childish
child|ish /tʃ'aɪldɪʃ/
1 [ADJ] usu ADJ n
Childish means relating to or typical of a child.
...childish enthusiasm.
2 [ADJ]
If you describe someone, especially an adult, as childish, you disapprove of them because they behave in an immature way.
...Penny's selfish and childish behaviour...
Don't be so childish.
= immature
1 [ADJ] usu ADJ n
Childish means relating to or typical of a child.
...childish enthusiasm.
2 [ADJ]
If you describe someone, especially an adult, as childish, you disapprove of them because they behave in an immature way.
...Penny's selfish and childish behaviour...
Don't be so childish.
= immature