adj. childish, immature, babyish, infantile, juvenile, silly, asinine, foolish, trivial, ridiculous, irresponsible, shallow, inconsequential, insignificant, US sophomoric Stop that puerile horseplay and settle down
PUERILE
Meaning of PUERILE in English
Oxford thesaurus English vocab. Английский словарь Оксфорд тезаурус. 2012