IPA: /ˈhɑːrθstoʊn/
KK: /ˈhɑrθstoʊn/
A type of stone used to make a hearth, which is the floor of a fireplace or the area in front of it.
The old house had a beautiful hearthstone that added charm to the living room.
Hearthstone → It is formed from "hearth" (from Old English *heorð*, meaning a fireplace or the floor of a fireplace) and "stone" (from Old English *stan*, meaning a rock or stone). The word "hearthstone" refers to a stone that forms the floor of a fireplace, symbolizing warmth and home.
Think of a 'fireplace' ('hearth') made of 'stone' — that's why hearthstone represents the stone of a fireplace.