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(as) hard as the nether millstone

Tough or harsh and unlikely to submit. The phrase is Biblical in origin. That guy is as hard as the nether millstone—he'll never give you what you want in the negotiations.
See also: hard, millstone, nether
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

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’.
See also: hard, millstone, nether
Farlex Partner Idioms Dictionary © Farlex 2017
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References in periodicals archive ?
The building, once converted, would allow the applicant's son and his children allowing to move out of the family home, Nether Ashentilly Cottage."
The abandoned car was floating in water which flooded the A34 bypass between Alderley Edge and Nether Alderley
Baluss Place will be closed and Nether Aden Road will have a temporary waiting restriction.
Prices per head: Beltex X PS96West Lundie; Beltex PS96 Cuiltburn; Cont PS95 Meikle Seggie; Cont X PS95 and PS94 Doune Farms; Texel PS90 Victoria; Texel X PS88 Dechmont; Suffolk PS82 Nether Strathkinnes; Mule PS71 Kilspindie; BF PS71 West Lundie.
During the meeting, the Nether lands Ambassador offered cooperation to Punjab in fields of Agriculture, Livestock, Dairy Development among others.
HE most frightening thing about The Nether is that it's set a mere 32 years from now.
I was at a red light on the Queslett Road, right by the turning for Nether Hall Park.
Our village of Nether Whitacre is directly on the flight path from Birmingham Airport and these "fire breathing monsters" fly directly over our house, constantly from 5am, every day.
The work will affect a number of streets - Bradley Mills Road, Brownroyd Avenue, Foxlow Avenue, Kilner Bank, Longfield Avenue, Nether Close, Nether Crescent, Netherhall Avenue, North Carr, Rawthorpe Crescent, Rawthorpe Lane, Ridgeway Close and Ridgeway.
Red Turnip Theater now mounts their most captivating season yet, kicking the Fourth Season off with the offbeat love story Tribes and closing it with the sci-fi thriller The Nether.
JAMES BOND producers have failed to persuade Daniel Craig to stay - even after strapping him to a table with an electric saw slicing its way to his nether say nether regions.
AND This Morning's Alice Beer on a risque gadget that strengthens women's pelvic floor muscles: "You put it inside you like a tampon, set up an app on your mobile and through Bluetooth it talks to your nether regions and your nether regions talk to your phone." Guaranteeing you a fast-pass to the Britain's Got Talent semi-finals.
(That's what she received for winning the 2012 Susan Smith Blackburn Prize for The Nether, her Olivier Award-nominated play.)
Gwynnie gets stick enough for preaching to people about Goop website, but now if we Actress/health guru Gwynnie gets stick enough for preaching to people about her design for life on her Goop website, but now if we don't surrender to her macrobiotic ways and start steam cleaning our nether regions (she actually does this), we might C/nd ourselves hearing that familiar refrain...
Wilkoff's Letters From Maine column entitled "The nether regions" (March 2014, p.