Where does “grindstone” come from?

Grindstone comes from Middle English grind-ston, a compound of grind and ston meaning a stone used for grinding.

grindstone (English): An abrasive wheel for sharpening, polishing or...

Definitions

Step	Language	Word	Meaning
1	English	Stone	—
2	Middle English	ston	Alternative form of stone
3	Old English	stān	stone, rock
4	Old Norse	Veggr	—
5	Proto-Germanic	wajjuz	wall
6	Proto-Indo-European	wh̥₁yús	—
7	Proto-Indo-European	weh₁y-	to twist, wind, weave, plait; to wrap, enclose,...

grindstone — Etymology, Origin & Word History | Etymology Explorer