NET
6 The enemy’s cities have been reduced to permanent ruins. You destroyed their cities; all memory of the enemies has perished.
Darby
6 O enemy! destructions are ended for ever. Thou hast also destroyed cities, even the remembrance of them hath perished.
KJV
6 O thou enemy, destructions are come to a perpetual end: and thou hast destroyed cities; their memorial is perished with them.