childish
US /ˈtʃaɪl.dɪʃ/
UK /ˈtʃaɪl.dɪʃ/
1.
infantil, pueril
of, like, or appropriate to a child
:
•
She has a very childish handwriting.
Tiene una letra muy infantil.
•
His behavior was quite childish for his age.
Su comportamiento era bastante infantil para su edad.