The Collaborative International Dictionary
Puerilely
Puerilely \Pu"er*ile*ly\, adv. In a puerile manner; childishly.
Wiktionary
puerilely
adv. In a puerile manner; childishly.
Usage examples of "puerilely".
Hitherto he had lived in so innocuously selfish, so puerilely playful, so inconceivably private and irresponsible a way.