Strong's #5427: nether (pronounced neh'-ther)

from 5425; mineral potash (so called from effervescing with acid):--nitre.

Brown-Driver-Briggs Hebrew Lexicon:

nether

1) natron, nitre, soda, carbonate of soda

Part of Speech: noun masculine

Relation: from H5425

Usage:

This word is used 2 times:

 

Proverbs 25:20: "weather, and as vinegar upon niter, so is he that singeth songs to a heavy"
Jeremiah 2:22: "For though thou wash thee with niter, and take thee much soap, yet thine iniquity is marked"