hearth; fireplace floor
Refers to the floor or base of a fireplace, furnace, or similar structure where the fire is built.
Arrange the firewood on the hearth of the fireplace.
Compound of 炉 (ro, 'furnace, hearth') and 床 (shō, 'floor, bed'). The reading しょう for 床 is the kan'on reading, used in technical compounds.