FEMINISE

feminize, feminise, effeminize, effeminise, womanize

(verb) to give a (more) feminine, effeminate, or womanly quality or appearance to; “This hairdo feminizes the man”

feminize, feminise

(verb) assume (more) feminine characteristics; “feminized language”; “feminized frogs”

Source: WordNet® 3.1

Verb

feminise (third-person singular simple present feminises, present participle feminising, simple past and past participle feminised)

Non-Oxford standard spelling of feminize.

Source: Wiktionary