(as) hard as stone

Very hard. I can't use this pillow, it's hard as stone! How am I supposed to knead this dough when it's as hard as stone? A lifetime of manual labor made the muscles in my father's arms as hard as stone.

See also: hard, stone

See also:

(as) hard as a rock
hard as a rock
(as) hard as iron
in the end
hard to swallow
be (as) hard as iron
bone hard
fulfill
fulfill (oneself)
honestly

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