Isaiah uses this feminine noun twice to describe urban destruction. In 23:13, Babylon reduces Tyre to ruins, and in 25:2, God transforms fortified cities into rubble heaps. Both passages emphasize total devastation: the city becomes 'a ruin,' no longer a city at all. The word conveys not partial damage but complete overthrow, reducing human achievement to debris. Isaiah's vision of divine judgment includes this radical uncreating of urban centers, a reversal of civilization itself as proud cities return to formless heaps.