impregnable
adjective
/ɪmˈpɹɛɡ.nəˌb(ə)l/
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- (figuratively) Too strong to be defeated or overcome; invincible.
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недосту́пный,
непристу́пный,
неуязви́мый
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- (military) Of a fortress or other fortified place: able to withstand all attacks; impenetrable, inconquerable, unvanquishable.
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непристу́пный
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impregnation
noun
/ɪmpɹɛɡˈneɪʃən/
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- The act of making pregnant; fertilization.
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зача́тие,
оплодотворе́ние
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- The fact or process of imbuing or saturating with something; diffusion of some element, idea etc. through a medium or substance.
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насыще́ние,
пропи́тывание
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