impregnable

im·preg·na·ble
UK: /ɪmpɹˈɛɡnəbə‍l/   US: /ˌɪmˈpɹɛɡnəbəɫ/
lýsingarorð
  • óvinnandi (impregnable camp, fortress)
  • ósigrandi

Samheiti: conceptive, inexpugnable, inviolable, secure, strong, unassailable, unattackable