yab.boq is the named watercourse that marks territory and is crossed in the Genesis narrative.

The term identifies a named watercourse, most often marking the extent of lands and borders between the Arnon, Ammonite territory, Gilead, and the Jordan; it also occurs in the account of a crossing.

1. Named watercourse in boundary descriptions · dominant

   As a proper noun, the form identifies a fixed geographic feature in territorial statements. In Numbers 21:24 the APB renders the land as extending “from the Arnon to the Jabbok”; Deuteronomy 3:16 and Judges 11:13 place it at the border of the sons of Ammon, while Joshua 12:2 and Judges 11:22 use it to state the reach of ruled or possessed territory. In Genesis 32:23, the same proper noun occurs in the account of causing people and possessions to cross the torrent.

   Numbers 21:24Deuteronomy 3:16Joshua 12:2Judges 11:13Judges 11:22Genesis 32:23

In the Anselm Project Bible: The APB presents the name in geographic phrases such as “the Jabbok,” “torrent Jabbok,” and “Jabbok valley.” These variations describe the verse-level setting rather than separate meanings of the term.