Nether - Idioms by The Free Dictionary
hard as the nether millstone (redirected from nether)
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hard as the nether millstone callous and unyielding.
The nether millstone is the lower of the two millstones by which corn is ground. The phrase alludes to Job 41:24: ‘His heart is as firm as a stone, and as hard as a piece of the nether millstone’.