castrate

noun

1. A castrated man; a eunuch.

   “The castrate voice had a strange power not duplicated by soprano or countertenor.”

verb

1. (transitive)To remove the testicles of a person or animal.

   “If the priests of Diana of Ephesus castrated themselves and offered their genitals on the altar, it was because the phallus was the symbol of the dying body.”

2. (transitive, uncommon)To remove the ovaries and/or uterus of an animal.
3. (figuratively, transitive)To take something from; to render imperfect or ineffectual.