puerile
adjective
[ ˈpjʊərʌɪl ]
• childishly silly and immature.
• "a puerile argument"
Similar:
childish,
immature,
infantile,
juvenile,
adolescent,
babyish,
silly,
inane,
fatuous,
jejune,
asinine,
foolish,
petty,
Origin:
late 16th century (in the sense ‘like a boy’): from French puéril or Latin puerilis, from puer ‘boy’.
