| 1-4 of 4Flashcard sets with a 'impregnable' term meaning '(adj.) resistant to capture or penetration (though the invaders used battering rams, catapults, and rain dances, the fortress proved ___ and resisted all attacks.' | |||
|---|---|---|---|
| # | Title | Terms | Date |
| 1 | 1~750by mashi1224 | 749 terms | July 23, 2009 |
| 2 | 1~650by mashi1224 | 650 terms | July 19, 2009 |
| 3 | 1~550by mashi1224 | 550 terms | July 14, 2009 |
| 4 | 1~500by mashi1224 | 500 terms | July 12, 2009 |