The act or process of infantilizing, or treating a non-infant as an infant(noun)
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Use "infantilization" in a sentence
"OK, there's always going to be a certain level of grumbling when a phenom's this gigantic -- one online columnist opined that the Potter books, because they are also popular with adults, only contribute to an increasing "infantilization" of culture."
"It could be to promote their careers, or it could be because of what some have called the infantilization of adults – people just want to stretch out their teen years deep into their 30’s."
""I think there are competing failures," including too big a role for the United States at the bargaining table, resulting in what she calls the "infantilization" of the two parties."