castrate in WordNet English dictionary

1. remove the ovaries of
   "Is your cat spayed?"
   alter  neuter  spay  castrate 
   
2. edit by omitting or modifying parts considered indelicate
   "bowdlerize a novel"
   bowdlerize  bowdlerise  expurgate  castrate  shorten 
   
3. remove the testicles of a male animal
   emasculate  castrate  demasculinize  demasculinise 
   
4. deprive of strength or vigor
   "The Senate emasculated the law"
   emasculate  castrate 
   

1. a man who has been castrated and is incapable of reproduction
   "eunuchs guarded the harem"
   eunuch  castrate