in·fan·til·ize [ ínfənt'l z, in fánt'l z ](past and past participlein·fan·til·ized, present participlein·fan·til·iz·ing, 3rd person present singularin·fan·til·iz·es)
transitive verb
Definition:
1. keep from maturing: to make somebody infantile, or keep somebody in an infantile state
2. treat as a baby: to treat somebody as or consider somebody to be infantile