puerilism

[ pyoo-er-uh-liz-uhm, pyoor-uh- ]

noun

, Psychiatry.

1. childishness in the behavior of an adult.

puerilism

/ ˈpjʊərɪˌlɪzəm /

noun

1. psychiatry immature or childish behaviour by an adult

Word History and Origins

Origin of puerilism¹

First recorded in 1920–25; puerile + -ism