'Wilderness' signifies something with little life in it, as described in the internal sense in Luke 1:80 'Wilderness' signifies somewhere there is no good because there is no truth. 'Wilderness,' as in Jeremiah 23:10, signifies the Word when it is adulterated.

(Referencat: Arcana Coelestia 1927)

73. And out of His mouth a sharp two-edged sword going forth, signifies the dispersion of falsities by the Word. This is evident from the signification of "going forth out of the mouth," as being, in reference to the Lord, Divine truth, thus the Word, for the Word goes forth out of the Lord's mouth. This is evident also from the signification of "the long sword," or the "sword," as being truth combating; and as truth, when it combats, disperses falsities, therefore a "long sword" also signifies the dispersion of falsities. The long sword is called "two-edged and sharp," because truth completely disperses. (That "long sword" or "sword" signifies truth combating against falsities and destroying them, see Arcana Coelestia 2799, 6353, 8294.) As "the long sword" is frequently mentioned in the following pages (as in chap. 2:12, 16; 6:4, 8; 13:10, 14; 19:15, 21), passages from the Word illustrating and showing that it signifies truth combating and dispersing falsities, will here be omitted. This will be illustrated and shown in those places.