Simple past tense and past participle of infantilise.(verb)
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Use "infantilised" in a sentence
"In June, Fry criticised "infantilised" TV programmes"
"University dons have warned that youngsters are becoming 'infantilised'."
"She was also in the creepy thriller Don't Say A Word with Michael Douglas, although that was, perhaps, the kind of infantilised part which might have done her grownup career more harm than good."