Webster's Revised Unabridged Dictionary · 1913

Nether

Nether (net"ẽr) , adjective

[Old English nethere, neithere, Anglo-Saxon nieera, from the adv. nieer downward; akin to neoean below, beneath, Dutch neder down, German nieder, Swedish nedre below, nether, a. & adv., and also to Sanskrit ni down. r201. Compare Beneath.]

Situated down or below; lying beneath, or in the lower part; having a lower position; belonging to the region below; lower; under; -- opposed to upper.
'Twixt upper, nether, and surrounding fires. — Milton
This darksome nether world her light Doth dim with horror and deformity. — Spenser
All my nether shape thus grew transformed. — Milton