Impregnable
"Impregnable" in German
sturmfrei
(of a fortress or other fortified place: able to withstand all attacks — see also impenetrable, inconquerable, unvanquishable)
unangreifbar
(of a fortress or other fortified place: able to withstand all attacks — see also impenetrable, inconquerable, unvanquishable)
unangreifbar
(too strong to be defeated or overcome — see also invincible)
unbezwingbar
(of a fortress or other fortified place: able to withstand all attacks — see also impenetrable, inconquerable, unvanquishable)
unbezwingbar
(too strong to be defeated or overcome — see also invincible)
uneinnehmbar
(of a fortress or other fortified place: able to withstand all attacks — see also impenetrable, inconquerable, unvanquishable)
uneinnehmbar
(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.