impregnable

1. 1.

   immune to attack; incapable of being tampered with

   “an impregnable fortress”

   “fortifications that made the frontier inviolable”

   “a secure telephone connection”

   Synonymsinviolablesecurestrongunassailableunattackable

   Similarinvulnerable
2. 2.

   capable of conceiving

   Synonymsconceptive

   Similarfertile
3. 3.

   incapable of being overcome, challenged or refuted

   “an impregnable argument”

   “impregnable self-confidence”

   Synonymsinexpugnable

   Similarunconquerable

Questions about impregnable

What does impregnable mean?

impregnable means "immune to attack; incapable of being tampered with". That is the primary sense; the word has 3 in total, listed in full on this page.

How many syllables are in impregnable?

impregnable has 4 syllables: im-preg-na-ble. The stress falls on "preg". In IPA it is /ˌɪmˈpɹɛɡnəbəl/.

What is another word for impregnable?

Close synonyms include inviolable, secure, strong, unassailable, unattackable. Each sense on this page lists its own synonyms, because a word with several meanings rarely has one substitute that works for all of them.

Is impregnable a common word?

impregnable is banded "Uncommon" — turns up in careful writing rather than conversation. The band comes from how often the word appears in a large corpus of everyday English, not from an editor's impression.