INFANTINE, infantile; puerile; boyish, girlish, childish, babyish, kittenish; childly [rare], boylike, girllike, kiddish [colloq.], dollish [colloq.]; youngling, infant, baby; newborn, unfledged, newfledged, callow.
in the cradle, in swaddling clothes, in long clothes, in arms, in leading strings; at the breast; in ones teens; young [See Youth].
First the infant Mewling and puking in the nurses arms.As You Like It