Words: nether, nethers [MW]

(I just love this word.)

Main Entry:    neth·er
Pronunciation:    'ne-[th]&r
Function:    adjective
Etymology:    Middle English, from Old English nithera, from nither down; akin to Old High German nidar down, Sanskrit ni
1 : situated down or below : LOWER "the nether side"
2 : situated or believed to be situated beneath the earth's surface "the nether regions"