infantile

childish, immature, child, concerning infants

ɛ̃ . f ɑ̃ . t i l
infant child + ile relating to
adjective Rare #51,302
childish, immature Usually negative when describing an adult’s behavior.
FR: Ne sois pas infantile.
EN: Don’t be childish.
child, concerning infants Used before a noun in expressions such as « prostitution infantile »; this meaning is less common in everyday conversation.
FR: La mortalité infantile a diminué.
EN: Infant mortality has decreased.

Ne sois pas si infantile.

Don’t be so childish.

Pourquoi Tom agit-il de façon si infantile ?

Why is Tom acting so childishly?

Permets-moi d'être infantile par moi-même.

Let me be childish on my own.

— The Man from Earth (2007)

Il est temps d'aborder sérieusement la prostitution infantile.

It is time to seriously address child prostitution.