a.dum.mim is a proper place-name marking the ascent used in boundary descriptions.

The term appears as a proper place-name associated with an ascent in two boundary routes: one route turns toward that ascent, while another lies opposite it.

1. Place-name at a boundary ascent · dominant

   In Joshua 15:7, the proper noun occurs in the clause describing a border that turns northward toward an ascent; the APB renders this as “the ascent of Adummim.” In Joshua 18:17, the boundary route reaches Geliloth opposite the same ascent, again rendered “the ascent of Adummim.”

   Joshua 15:7Joshua 18:17

In the Anselm Project Bible: Across both verses, the APB presents the proper name within the phrase “the ascent of Adummim.” The precise division between the name and the surrounding phrase cannot be further isolated.