Strong's #7708: Siddiym (pronounced sid-deem')

plural from the same as 7704; flats; Siddim, a valley in Palestine:--Siddim.

Brown-Driver-Briggs Hebrew Lexicon:

ּׂ

śiddı̂ym

Siddim = "field" or "plain"

1) valley where the Dead Sea is located

Part of Speech: noun proper locative

Relation: plural from the same as H7704

Usage:

This word is used 3 times:

 

Genesis 14:3: "were joined together in the vale of Siddim, which is the salt sea."
Genesis 14:8: "battle with them in the vale of Siddim;"
Genesis 14:10: "And the vale of Siddim was full of slime pits; and the kings of Sodom and Gomorrah"