Jamieson, Fausset and Brown on Deuteronomy 1:19-21

19-21. we went through all that great and terrible wilderness--of Paran, which included the desert and mountainous space lying between the wilderness of Shur westward, or towards Egypt and mount Seir, or the land of Edom eastwards; between the land of Canaan northwards, and the Red Sea southwards; and thus it appears to have comprehended really the wilderness of Sin and Sinai [Fisk]. It is called by the Arabs El Tih, "the wandering." It is a dreary waste of rock and of calcareous soil covered with black sharp flints; all travellers, from a feeling of its complete isolation from the world, describe it as a great and terrible wilderness.