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WordReference Random House Learner's Dictionary of American English © 2024im•preg•na•ble1 /ɪmˈprɛgnəbəl/USA pronunciation adj. - strong enough to withstand attack; unconquerable:an impregnable fort.
- that cannot be argued against or shown to be wrong:impregnable proof.
im•preg•na•bil•i•ty /ɪmˌprɛgnəˈbɪlɪti/USA pronunciation n. [uncountable] im•preg•na•bly, adv. im•preg•na•ble2 /ɪmˈprɛgnəbəl/USA pronunciation adj. - Developmental Biologythat may become pregnant.
WordReference Random House Unabridged Dictionary of American English © 2024im•preg•na•ble1 (im preg′nə bəl),USA pronunciation adj. - strong enough to resist or withstand attack;
not to be taken by force, unconquerable:an impregnable fort. - not to be overcome or overthrown:an impregnable argument.
- Middle French, equivalent. to im- im-2 + prenable pregnable
- late Middle English impregnable, imprenable 1400–50
- 1.See corresponding entry in Unabridged invulnerable.
- 1, 2.See corresponding entry in Unabridged See invincible.
- 2.See corresponding entry in Unabridged unassailable.
- 1.See corresponding entry in Unabridged vulnerable.
im•preg•na•ble2 (im preg′nə bəl),USA pronunciation adj. - Developmental Biologysusceptible to impregnation, as an egg.
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