from The American Heritage® Dictionary of the English Language, 4th Edition
- transitive v. To reduce to an infantile state or condition: "It creates a crisis that infantilizes them—causes grown men to squabble like kids about trivial things” ( New Yorker).
- transitive v. To treat or condescend to as if still a young child: "The Victorian physician infantilized his patient” ( Judith Moore).
from Wiktionary, Creative Commons Attribution/Share-Alike License
- v. To reduce (a person) to the state or status of an infant.
- v. To treat (a person) like a child.
infantile + -ize (“make into”) (Wiktionary)