What's the "een" in Halloween?
1844, noun of action from feminize.
1650s, from Latin femina (see feminine) + -ize. Related: Feminized; feminizing. Femalize (1670s, intransitive, 1709, transitive) and femininize (1868) are more rare.
feminization fem·i·ni·za·tion (fěm'ə-nĭ-zā'shən)n. The acquisition of female characteristics by the male.