IPA: /ˈmɒp.bɔːrd/
KK: /ˈmɑpˌbɔrd/
A board that runs along the bottom of a wall, typically used to cover the joint between the wall and the floor.
The new house has beautiful wooden mopboards that match the flooring.
Mopboard → The word is formed from 'mop' (from Middle English *moppe*, meaning a tool for cleaning) and 'board' (from Old English *bord*, meaning a flat surface or plank). A mopboard is a board that is used to cover the joint between the wall and the floor, often associated with cleaning.
Think of a 'mop' as a cleaning tool and 'board' as a flat surface — a mopboard is a board that helps keep the area clean where the wall meets the floor.