Sterilized
Aseptic
noun, の adjective
むきん
殺菌 （さっきん） Sterilization
無菌 （むきん） Sterilized, Aseptic
The moo む (cow) king きん was Sterilized to keep the cow population in check.
His clothes had to be Sterilized because he was mucking むきん around in the mud.