LATIN DICTIONARYLexicon Latīnum
adverb

puerīliter

puerīliter (comparative puerīlius, superlative puerīlissimē)
Classical[pu.ɛˈriː.lɪ.tɛr]Ecclesiastical[pu.eˈriː.li.ter]

Meaning

  1. childishly, foolishly

Latīnē defined in Latin in our graded readers

mōre puerōrum
pueriliter — in Epistulae, ch. 4

pŭĕrīlĭter, adv., v. puerilis
I. fin.

Origins

Proto-Indo-European *-teros? Latin -ter Latin puerīliter From puerīlis (“boyish, childish”) + -ter.

Quick answers

What does puerīliter mean in Latin?
puerīliter, a adverb, means “childishly, foolishly”.
How do you pronounce puerīliter?
In classical Latin, [pu.ɛˈriː.lɪ.tɛr]; in ecclesiastical (church) Latin, [pu.eˈriː.li.ter].