neth·er /ˈnɛðɚ/
  (a.)下麵的,下方的,下界的
  Neth·er a.  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.
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  nether
       adj 1: lower; "gnawed his nether lip"
       2: of the underworld; "nether regions" [syn: chthonian, chthonic,
           lower]
       3: located below or beneath something else; "nether garments";
          "the under parts of a machine" [syn: under]