hard as a rock

*hard as a rock

and *hard as stone

very hard. (*Also: as ∼.) This cake is as hard as a rock! I can't drive a nail into this wood. It's hard as stone.

Name	Pronounced	Usage
Drishti	-	Indian, Hindi
Christos	-	Theology
Lelle	-	Swedish
Zofia	ZAW-fyah	Polish
Ashraqat	-	Arabic
Geoff	JEF	English