Wiktionary
infantilize
vb. 1 (context transitive English) To reduce (a person) to the state or status of an infant. 2 (context transitive English) To treat (a person) like a child.
Usage examples of "infantilize".
If he knew that his parents knew of his secret activities, that would infantilize him, apparently.
Often, we are angry because we are feeling put down, neglected, dealt with unfairly, infantilized, insulted, or cheated in some way.
The people advocating calli are well-intentioned, but what they’re doing is infantilizing us.