puerile
1. [ adjective ] of or characteristic of a child
Examples:

"puerile breathing"

Related terms: child
2. [ adjective ] displaying or suggesting a lack of maturity
Synonyms: jejune juvenile adolescent
Examples:

"adolescent insecurity" "jejune responses to our problems" "their behavior was juvenile" "puerile jokes"

Related terms: immature
Similar spelling:   purl
  purloo
  peril