sterilise
ster-il-ise
verb
To make something completely free from bacteria or other living microorganisms.
"Nurses sterilise surgical instruments before use."
verb
To make a person or animal unable to produce offspring.
"The vet will sterilise the cat next week."
Thesaurus
Synonyms: sterilize, desex, desexualize, fix, unsex, desexualise