childish
/ˈtʃaɪldɪʃ/
adjective
- Behaving in a silly or immature way, like a child.
- Stop being so childish and accept that you can't always get what you want.
- The manager criticized the team's childish behavior during the meeting.
- His childish tantrum over losing the game embarrassed everyone.
- Typical of or suitable for a child; simple or innocent.
- The room was decorated with childish drawings and bright colors.
- She still has a childish love for cartoons and fairy tales.
- His childish excitement at seeing the fireworks was contagious.