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
Nobu	no-boo	Japanese
Norma	['nɔ:mə]
Liucija	LUW-tsi-yah	Lithuanian
Kentigern	-	Scottish
Raffael	RAH-fah-el	German
Godfried	KHAWT-freet	Dutch