Examples of using "Kinderachtig" in a sentence and their english translations:
Don't be so childish.
- Tom is immature.
- Tom is childish.
She behaves in a childish way.
That's so juvenile.
We regarded his behavior as childish.
He can be quite petty.
His statements are childish and they often bother me.
- I'm sorry I acted like a child last night.
- I'm sorry that I acted like a child last night.