Synonyms for Emasculate (same or very similar meaning)
WordNet sense 1 (having unsuitable feminine qualities):
effeminate, sissified, sissy, epicene, cissy, sissyishWordNet sense 2 (not possessing qualities befitting a man):
unmanly, unmanful, unmanlikeWordNet sense 3 (deprive of strength or vigor):
castrateWordNet sense 4 (remove the testicles of a male animal):
demasculinise, demasculinizeFrom the ODE community, based on WordNetadd/edit