| Infantile (a.) of or pertaining to infancy, or to an infant; similar to, or characteristic of, an infant; childish; as, infantile behavior. Thesaurus Entries abecedarian, aboriginal, antenatal, autochthonous, babish, baby, babyish, beginning, budding, childish, childlike, creative, doll-like, dollish, elemental, elementary, embryonic, fetal, formative, foundational, fundamental, gestatory, immature, in arms, in diapers, in embryo, in its infancy, in nappies, in swaddling clothes, in the bud, in the cradle, inaugural, inceptive, inchoate, inchoative, incipient, incunabular, infant, infantine, initial, initiative, initiatory, introductory, inventive, juvenile, kittenish, nascent, natal, neonatal, newborn, original, parturient, postnatal, pregnant, prenatal, primal, primary, prime, primeval, primitive, primogenial, procreative, puerile, rudimental, rudimentary, ur |