Haller's Concordance: IMPREGNABLE

• Wherefore that thou mayst overcome them without joining battle, set guards at the springs that they may not draw water out of them, and thou shalt destroy them without sword, or at least being wearied out they will yield up their city, which they suppose, because it is situate in the mountains, to be impregnable. Jud. 7:9
• Now when Timotheus had knowledge of the coming of Judas, he sent the women and children, and the other baggage, before him into a fortress, called Carnion: for it was impregnable, and hard to come at, by reason of the straitness of the places. 2 Ma. 12:21