sid.dim is the proper name of the valley where rulers gathered for battle and where fleeing kings encountered bitumen wells.

The attested forms identify a particular valley: rulers assemble there, battle there, and fleeing kings encounter its bitumen wells; Genesis 14:3 also identifies that valley with the Salt Sea in the APB rendering.

1. Proper name of a battle-site valley · dominant

   All three occurrences are tagged Noun · Proper and locate events at the same named valley. In Genesis 14:3 the APB renders rulers uniting there and identifies it as the Salt Sea; in Genesis 14:8 it renders the kings arranging battle there; and in Genesis 14:10 it renders the valley as having wells of bitumen where fleeing kings fell.

   Genesis 14:3Genesis 14:8Genesis 14:10

In the Anselm Project Bible: Across Genesis 14:3, Genesis 14:8, and Genesis 14:10, the APB presents the name as "the Valley of Siddim." The verse is read as a whole, but it consistently treats the form as the valley's proper name.