(as) hard as a rock
(as) hard as a rock
Very hard. I can't use this pillow, it's hard as a rock!
See also: hard, rock
Farlex Dictionary of Idioms.
*hard as a rock
and *hard as stonevery 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.
See also: hard, rock
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs.
- hard as a rock
- (as) hard as stone
- harder than the back of God's head
- be hard at it
- hard going
- in the end
- come by
- honestly
- hard to come by
- hard to swallow