Puerile

a.

1.

Boyish; childish; trifling; silly. The French have been notorious through generations for their puerile affectation of Roman forms, models, and historic precedents. - De Quincey.

Adj.	1.	puerile - of or characteristic of a child; "puerile breathing"
	2.	puerile - displaying or suggesting a lack of maturity; "adolescent insecurity"; "jejune responses to our problems"; "their behavior was juvenile"; "puerile jokes" Synonyms: jejune, juvenile, adolescent

asinine, babish, babyish, beardless, boyish, boylike, calflike, childish, childlike, coltish, foolish, girlish, girllike, immature, inconsequential, infantile, infantine, insignificant, irresponsible, juvenile, kiddish, maiden, maidenly, puplike, puppyish, puppylike, ridiculous, shallow, silly, sophomoric, trivial