IPA: /ˌɪn.fən.tɪ.laɪˈzeɪ.ʃən/
KK: /ɪnˌfæntɪlaɪˈzeɪʃən/
The act of treating someone as if they are much younger or less mature than they really are.
The infantilization of adults can lead to a lack of independence and self-confidence.
Infantilization is formed from "infantilis" (from Latin, meaning childish or infant) and the suffix "-ization" (meaning the process of making or becoming). The word refers to the process of making someone behave like an infant or treating them as if they are childish.
Think of the word 'infant' which means a very young child, and remember that 'infantilization' refers to the process of making someone act like a child.