His place in the hearts of most Thai is central and impregnable.
When Sherman reached those earthworks, he thought them the most impregnable he had ever seen.
She claimed he groped her crotch, pulling at her pantyhose, but the barrier was impregnable.
But it was really the uemployment data that turned out to be his impregnable fortress.
It is easy, therefore, to understand why the early Jebusites regarded their city as impregnable.
In our own single manhood to be bold, Fortressed in conscience and impregnable.'
Resistance was cut short and Al-Qamus, the impregnable, was captured by the warriors of Islam.
Slowly, cautiously, it was unrolling its ball of impregnable armour.
His position was impregnable to the dogs, but, thus perched, he was a splendid mark for E-tuk-i-shook.
The Republic could not suffer at their hands; the Republic and the dynasty were impregnable.
early 15c., imprenable "impossible to capture," from Middle French imprenable "invulnerable," from assimilated form of in- "not, opposite of" (see in- (1)) + Old French prenable "assailable, vulnerable" (see pregnable). With intrusive -g- 16c., on model of deign, reign, etc. Related: Impregnability.