infantile[adjective]Synonyms: childish, babyish, immature, puerile
Antonyms: adult
[TahlilGaran] English Synonym Dictionary ▲
in‧fan‧tile /ˈɪnfəntaɪl/
adjective1. infantile behaviour seems silly in an adult because it is typical of a child
Synonym : childish:
infantile jokes2. [only before noun] technical relating to or affecting babies and very young children:
infantile development [TahlilGaran] Dictionary of Contemporary English ▲