infantileadjective/ĩ.fɐ̃.til/mediumin·fan·tilPortuguesEnglishEspanolFrancaisDefinitionOf or relating to children; childish.The infantile behavior was surprising for his age.She enjoys reading infantile stories.synchildishyouthfulantmatureadultEtymologyDo latim 'infantilis'Related wordsinfânciainfanteinfantilmente