Impregnable

"Impregnable" in Italian

impenetrabile

(of a fortress or other fortified place: able to withstand all attacks — see also impenetrable, inconquerable, unvanquishable)

imprendibile

(too strong to be defeated or overcome — see also invincible)

inattaccabile

(of a fortress or other fortified place: able to withstand all attacks — see also impenetrable, inconquerable, unvanquishable)

inattaccabile

(too strong to be defeated or overcome — see also invincible)

inespugnabile

(of a fortress or other fortified place: able to withstand all attacks — see also impenetrable, inconquerable, unvanquishable)

inespugnabile

(too strong to be defeated or overcome — see also invincible)

invulnerabile

(too strong to be defeated or overcome — see also invincible)

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.