childish

US /ˈtʃaɪl.dɪʃ/
UK /ˈtʃaɪl.dɪʃ/
"childish" picture
1.

幼稚的, 孩子氣的

of, like, or appropriate to a child

:
She has a very childish handwriting.
她的字跡很稚嫩
His behavior was quite childish for his age.
他的行為對於他的年齡來說相當幼稚