puerile
adjective disapproving uk/ˈpjʊə.raɪl/ us/ˈpjuː.ɚ.ɪl/
幼稚的,傻气的
behaving in a silly way, not like an adult
I find his sense of humour rather puerile. 我发现他的幽默感相当傻气。
Synonyms: childish immature juvenile
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