← BackshareGuessbabiest/ˈbeɪbiɪst/adjectiveMost like a baby; most childish or immature.Of all the puppies, the smallest one had the babiest whimper.His handwriting was the babiest in the class, with wobbly letters.She gave the babiest pout when she didn't get her way.SynonymsinfantilechildishAntonymsmature