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
Angelos	-	Greek
Veva	-	English
Ishild	-	Ancient Germanic (Hypothetical)
Hyun-Jung	hyun-jung	Korean
Edoardo	-	Italian
Neta	-	Hebrew