im· preg· na· ble im-ˈpreg-nə-bəl. 1. : incapable of being taken by assault : unconquerable. an impregnable fortress. 2. : unassailable. also : impenetrable. impregnable walls. impregnability.

strong enough to resist or withstand attack; not to be taken by force, unconquerable: an impregnable fort. not to be overcome or overthrown: an impregnable argument. OTHER WORDS FOR impregnable 1 invulnerable. 2 unassailable. See synonyms for impregnable on Thesaurus.com OPPOSITES FOR impregnable 1 vulnerable.

im·preg·na·ble 1 1. Impossible to capture or enter by force: an impregnable fortress. 2. Difficult or impossible to attack, challenge, or refute with success: an impregnable argument.

impregnable adjective uk / ɪmˈpreɡ.nə.b ə l / us / ɪmˈpreɡ.nə.b ə l / A building or other place that is impregnable is so strongly built and/or defended that it cannot be entered by force: Despite burglar alarms and window locks, homes are never impregnable against determined thieves. mainly UK powerful and impossible to beat, especially in sport:

impregnable adjective 1 as in invincible incapable of being defeated, overcome, or subdued an impregnable fortress that had foiled one invader after another over the centuries Synonyms & Similar Words Relevance invincible invulnerable unconquerable insurmountable bulletproof unstoppable unbeatable indomitable unassailable armored insuperable

impregnable Add to list Share adjective immune to attack; incapable of being tampered with “an impregnable fortress” synonyms: inviolable, secure,... adjective incapable of being overcome, challenged, or refuted “an impregnable argument” “ impregnable... adjective capable of conceiving synonyms: ...

Britannica Dictionary definition of IMPREGNABLE 1 : not able to be captured by attack : very strong an impregnable fortress impregnable defenses 2 : not likely to be weakened or changed an impregnable reputation Her arguments seemed impregnable.

impregnable adjective us / ɪmˈpreɡ.nə.b ə l / uk / ɪmˈpreɡ.nə.b ə l / A building or other place that is impregnable is so strongly built and/or defended that it cannot be entered by force: Despite …

Princeton's WordNet (5.00 / 1 vote) Rate this definition: impregnable, inviolable, secure, strong, unassailable, unattackable adjective immune to attack; incapable of being... conceptive, impregnable adjective capable of conceiving impregnable, inexpugnable adjective incapable of being overcome, ...

impregnable in British English (ɪmˈprɛɡnəbəl ) adjective 1. unable to be broken into or taken by force an impregnable castle 2. unable to be shaken or overcome impregnable self-confidence 3. incapable of being refuted an impregnable argument Collins English Dictionary. Copyright © HarperCollins Publishers Derived forms