Impregnable
"Impregnable" in Czech
nedobytný
(of a fortress or other fortified place: able to withstand all attacks — see also impenetrable, inconquerable, unvanquishable)
nedobytný
(too strong to be defeated or overcome — see also invincible)
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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.