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The Hebrew word so rendered means “boiling” or “effervescing.” From Isaiah 33:12 it appears that lime was made in a kiln lighted by thorn-bushes.
In Amos 2:1, it is recorded that the king of Moab “burned the bones of the king of Edom into lime.”
The same Hebrew word is used in Deuteronomy 27:2-4, and is there rendered “plaster.”
Limestone is the chief constituent of the mountains of Syria.