sterilize

Concise Oxford English Dictionary © 2008 Oxford University Press:
sterilize /ˈsterəlʌɪz/ (or sterilise)

▶verb

• 1 make sterile.

• 2 deprive of the ability to produce offspring by removing or blocking the sex organs.

– derivatives
sterilizable adjective,
sterilization noun,
sterilized adjective,
sterilizer noun.