ar.non is the name of a torrent or valley repeatedly used to mark territorial boundaries.

The term is a proper geographical name for a watercourse and its valley or gorge, especially when locating settlements, routes, and territorial limits. The supplied verses repeatedly place it at the boundary of Moab, Amorite-held land, and Israelite territory.

1. Named torrent, valley, or territorial boundary · dominant

   The noun proper form identifies a geographical feature used to define extents and borders. In Numbers 21:13 the APB renders it as a boundary between Moab and the Amorites; in Deuteronomy 3:16, Joshua 12:2, and Judges 11:18, the clause places it alongside other territorial limits or explicitly calls it Moab's border.

   Numbers 21:13Deuteronomy 3:16Joshua 12:2Judges 11:18Deuteronomy 2:24Joshua 13:16

In the Anselm Project Bible: Across the supplied verses, the APB presents the name with geographical descriptors such as “Arnon torrent,” “Arnon valley,” “Arnon Gorge,” and “wadis of the Arnon.” These varying descriptions occur in whole-verse translation renderings of the Hebrew token.