IPA: /ˈstækər/
KK: /ˈstækər/
A person or device that arranges items in a pile or stack, often used in contexts like supermarkets or sports.
The stacker organized the boxes neatly on the shelves.
Stacker → It is formed from "stack" (from Old English *stacian*, meaning to arrange in a pile) and "-er" (meaning a person who). A stacker is a person who arranges items in a pile or stack.
Think of someone who 'arranges' ('stack') things into a 'pile' — that's what a stacker does.