IPA: //ˈbeɪsˌbɔrd//
KK: /ˈbeɪsˌbɔrd/
A type of board that is placed at the bottom of a wall where it meets the floor, often used to cover the joint and add a decorative touch.
The carpenter installed a new baseboard in the living room to match the fresh paint.
Baseboard → It is formed from "base" (from Old French *base*, meaning foundation or bottom) and "board" (from Old English *bord*, meaning a flat piece of wood). The word "baseboard" refers to a board that forms the lower part of a wall, serving as a foundation or finishing touch at the bottom.
Think of a 'foundation' ('base') that is made of 'wood' ('board') at the bottom of a wall — that's what a baseboard is.