puerilism
noun
pu·er·il·ism
ˈpyu̇(-ə)r-ə-ˌli-zəm 
ˈpyu̇(-ə)r-ˌī-
: childish behavior especially as a symptom of mental illness
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“Puerilism.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/puerilism. Accessed 31 Dec. 2024.
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