'Foothills' in the Bible

So Joshua conquered all of these territories: the hill country, all of the Negev, the entire land of Goshen with its foothills, the plains of Jordan, and the mountains of Israel with its foothills

and toward the Arabah as far as the Sea of Galilee to the east, as far as the Arabah Sea (that is, the Dead Sea) to the east as one travels in the direction of Beth-jeshimoth, and to the south as far as the foothills of Pisgah.

in the mountain regions, in the Arabah, on the foothills, in the wilderness, in the Negev; that is, the Hittites, the Amorites, the Canaanites, the Perizzites, the Hivites, and the Jebusites: