(i) Wilderness

(ii) Midbar (4057) - the sense of driving; a pasture (i.e. open field, whither cattle are driven); by implication, a desert; also speech (including its organs):

From a primitive root; perhaps properly, to arrange; but used figuratively (of words), to speak; rarely (in a destructive sense) to subdue:

A land not suited for farming. Wilderness land was too dry, rough, or rocky to be cultivated, but it was sufficient for grazing <Gen. 14:6; Ex. 3:18>. Occasionally, the word wilderness means "desert." John the Baptist preached in the wilderness of Judea <Matt. 3:1; Luke 3:2-4>, and Jesus was in the wilderness when He was tempted by the devil <Mark 1:12; Luke 4:2>. In both instances a desert area is intended.

(from Nelson's Illustrated Bible Dictionary)

(Copyright (C) 1986, Thomas Nelson Publishers)

(iii) Place of spiritual dryness and testing.

(iv) (a) 3:6; 8:5