IPA: //ˈfriːzər//
KK: /ˈfrizər/
A device or space that keeps food and other items at very low temperatures to preserve them for a long time.
I put the leftover pizza in the freezer to keep it fresh for later.
Freezer → It is formed from "freez" (from Old English *freosan*, meaning to freeze) and "-er" (meaning a person or thing that performs a specified action). A freezer is a device that performs the action of freezing, preserving food by lowering its temperature.
Think of something that 'freezes' ('freozan') to keep things cold — that's why a freezer is a device that freezes items.