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
Dexter	DEKS-tər	English
LudĚK	-	Czech
Zackery	ZAK-ə-ree	English
Yehoyakim	-	Biblical Hebrew
Crystal	KRIS-təl	English
Sechnall	-	Irish