1. The main reason for this is the impregnability of Catholic principles. 2. We have lost our illusion of impregnability . 3. The seeming permanence and impregnability of the northern icescape have given it almost continental status in the human imagination. 4. This battle gave the fort a reputation for impregnability that had an effect on future military operations in the area. 5. In Thomas the focus of the verse is on the city's security and impregnability rather than its symbolism. 6. The walls and ceilings were made of reinforced concrete mixed with dense porphyry rocks, which added to their impregnability . 7. Hoover in his impregnability , an incitement to the novelist's perennial effort to detect the hidden nature of things. 8. Real Madrid's season-long impregnability at home will face a stern test Sunday against Valencia at Santiago Bernabeu stadium. 9. Real Madrid's season-long impregnability at home will face a stern against Valencia on Sunday at Santiago Bernabeu stadium. 10. The adjoining Brewster County Jail is distinguished by a crenelated brick parapet wall, suggesting " a fortress-like impregnability ".
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