infantine

adj

1. Infantile; childish.

   “Man, because he could not but acknowledge the majesty of Nature, fell into childish exultation at his acquired and still-increasing dominion over her elements. Even while he stalked a God in his own fancy, an infantine imbecility came over him.”

   “I saw Peggy with the infantine procession at her tail, marching with great dignity towards the stall of a neighbouring lollipop-woman.”