A sterilizer is a machine or substance that kills germs and bacteria to make things clean and safe to use.
A sterilizer is something that makes things very clean and safe. It is often used in hospitals, kitchens, and for baby things.
Examples:
The hospital uses a sterilizer to clean the tools.
I need to buy a sterilizer for the baby bottles.
The sterilizer makes the water safe to drink.
The sterilizer is like a superhero for germs!
The sterilizer can make anything clean in just a few minutes.
The sterilizer is the boss of clean things.