("swift, noisy".) The torrent; boundary between Moab and the Amorites on the N., and afterward between Moab and Reuben (Numbers 21:13-14; Numbers 21:24; Numbers 21:26; Deuteronomy 2:24; Deuteronomy 2:36). A branch of the Arnon (Seil es Saideh) flowing N.W. seemingly formed the eastern boundary of Moab (Judges 11:18; 2 Kings 10:33). Aroer was by its northern brink; the ruins still bear. the name. Rising in the Arabian mountains (the branch Sell es Saideh in the mountains of Gilead near Kalaat el Katrane), it flows through the wilderness and falls into the Dead Sea. Now the wady el Mojeb, flowing through a precipitous, rugged, gloomy ravine. The sides are of red and brown sandstone where it meets the Dead Sea; it is 10 feet; deep at that point. The Roman road between Rabba and Dhiban crosses it at two hours' distance from Rabba.