Definition of impregnable in English:

impregnable

adjective

  • 1(of a fortified position) unable to be captured or broken into.

    ‘an impregnable wall of solid sandstone’
    figurative ‘the companies are impregnable to takeovers’
    • ‘But sometime during the final week your impregnable fortress crashes and burns, but you land on your feet at the very end of the month.’
    • ‘Singapore, an island at the southern end of the Malay Peninsula, was considered a vital part of the British Empire and supposedly impregnable as a fortress.’
    • ‘In their accounts of hunting for a way out, they provide a survey of a border territory, an impregnable zone through which the people imprisoned above would never pass.’
    • ‘But he had other things in mind - plans that had been consuming his soul since he had escaped from La Fortaleza, the once impregnable fortress that had fallen a little over a year ago.’
    • ‘Labyrinthine streets of ancient slum housing traversed the steep hill up to the impregnable city walls.’
    • ‘The key to the Belgian defence along the Albert Canal was the supposedly impregnable fortress of Eben-Emael.’
    • ‘In the middle of Hue, however, was a virtually impregnable fortress known as the Citadel, with towers, ramparts, moats, concrete walls, and bunkers.’
    • ‘Later, he began building model castles, surrounded by fortified emplacements, and he spent hours studying the virtually impregnable fortifications of Vauban.’
    • ‘Austria ruled directly only in the newly formed Kingdom of Lombardy-Venetia, but from the impregnable fortresses of the Quadrilateral in the central Po Valley Austrian bayonets could reach any part of Italy.’
    • ‘I'm satisfied this place is nearly impregnable.’
    • ‘Incredibly sturdy, it had been built to serve as a nuclear bomb shelter if necessary, supposedly an impregnable fortress of civil defense.’
    • ‘The castle had been built with a good eye for defense; this place was virtually impregnable.’
    • ‘Yes sir, but we think that the position is impregnable and we can hold it against far superior forces.’
    • ‘Between them they created a seemingly impregnable fortress, naturally protected on three sides by cliffs and defended by concentric lines of mutually supporting fortifications.’
    • ‘However, instead of building the fort on a hill, the impassable wetlands were used to create an impregnable site, the biggest marshland in England.’
    • ‘The walls surrounding the city were impregnable, never before breached by an attacking army.’
    • ‘On 15 September French and Serbian mountain troops successfully attacked hitherto impregnable Bulgarian positions.’
    • ‘In the face of these pressures, Anglican natural theology retreated into the apparently impregnable fortress of biology.’
    • ‘There has to be something; no fortress is completely impregnable.’
    • ‘No doubt it will go the way of all seemingly impregnable empires of the past.’
    invulnerable, impenetrable, unattackable, unassailable, inviolable, secure, strong, stout, safe, well fortified, well defended
    View synonyms
    1. 1.1 Unable to be defeated or destroyed; unassailable.
      ‘the case against Hastings would have been almost impregnable’
      • ‘After all, within the space of a three-month election campaign she managed to squander a seemingly impregnable lead of 22 percent over the SPD.’
      • ‘He's seen what looked like an impregnable 22-point lead slashed to just two ahead of me.’
      • ‘He required forceful persuasion to forego county commitments to fly back for the final, but no-one smiled brighter after the previously impregnable Ireland had been clinically defeated by 47 runs.’
      • ‘But Preston were knocked sideways by the shock of seeing their impregnable lead suddenly wiped out.’
      • ‘Still, to perfect one's play at Worms, you will have to spend a lot of time learning the nuances of each weapon and tricks on how to defeat what seems like an impregnable AI.’
      • ‘The victory stretched their 100 percent winning sequence to 19 matches and they now have an impregnable nine point lead at the top.’
      • ‘He was impregnable, unbeatable, and nothing, no creature could even come close to conquering the mighty Kong.’
      • ‘Then, without warning, you've got the world's number one goalkeeper in self-destruct mode, the England captain glancing an own goal home and a seemingly impregnable lead overturned.’
      unassailable, unbeatable, undefeatable, unshakeable, invincible, indomitable, unconquerable, unstoppable, invulnerable
      View synonyms

Origin

Late Middle English: from Old French imprenable, from in- not + prendre take (from Latin prehendere). The current spelling arose in the 16th century, perhaps influenced by Old French variants.

Pronunciation:

impregnable

/imˈpreɡnəb(ə)l/