ˈinfən.ˌtīl also -n.təl sometimes -n.ˌtēl or -n.(ˌ)til adjective
Etymology: probably from French, from Latin infantilis, from infant-, infans infant + -ilis -ile
1. : of or relating to infants or infancy
infantile disease
infantile state
2. : suitable to an infant : characteristic of an infant : very immature : childish
infantile level of entertainment
infantile tantrum
3. : affected with infantilism
4. of topography : being in a very early stage of development presumably following an uplift or equivalent change with respect to base level
infantile stream
infantile mountain range