impregnable [im'preɡnəbl]

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a. conceptive��inexpugnable��inviolable��secure

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1. Before World War II, the French regarded their Maginot Line as an impregnable bulwark against a German invasion.
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2. Therefore, the family installs the company, if wants to be in an impregnable position in the intense market competition must seek some new breakthroughs.
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3. He lived in excessive luxury, in a palace he believed impregnable, caring little or nothing for the two and three quarter million people who occupied Primordium.
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adj.
  1. able to withstand attack
  2. capable of conceiving
  3. incapable of being overcome, challenged or refuted

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impregnable
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impregnable pass
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Impregnable Quadrilateral
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Impregnable Fortress
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immune impervious impregnable
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