hinnōm הִנֹּם ‘Hinnom’ (Hebrew)

Etymology^?: probably of foreign derivation

hinnōm pr n loc
Hinnom = "lamentation"
1) a valley (deep and narrow ravine) with steep, rocky sides located southwest of Jerusalem, separating Mount Zion to the north from the 'hill of evil counsel' and the sloping rocky plateau of the 'plain of Rephaim' to the south