To make incapable of bearing fruit or germinating.

Is it sterilize or Sterilise?

As verbs the difference between sterilise and sterilize

is that sterilise is (british and commonwealth): to sterilize while sterilize is to deprive a male or female the ability to procreate.

What is a sterilizer?

a : an apparatus for destroying viable microorganisms (as by the use of steam or dry heat) — compare autoclave, sterilant. b : a person whose work involves sterilizing something (such as medical equipment)