IPA: /ˈwaɪtbɔːrd/
KK: /ˈhwaɪtˌbɔrd/
A smooth, flat surface that is usually white and used for writing or drawing with special markers that can be erased.
The teacher wrote the lesson plan on the whiteboard for the students to see.
Whiteboard → It is formed from "white" (from Old English "hwita", meaning bright or light in color) and "board" (from Old English "bord", meaning a flat piece of material). The word "whiteboard" refers to a flat surface that is bright or light in color, typically used for writing or drawing with markers.
Think of a flat surface that is 'bright' ('white') and made of 'material' ('board') — that's what a whiteboard is used for.