Arsenal are in an impregnable position at the top of the league. [adjective]
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The security of our land is founded on the myth of the impregnable fortress. [adjective]
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Further inland you will find the ancient extinct volcanoes and the impregnable castles of the Auvergne. [adjective]
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As a castle, it had been well respected in its day, though not of mighty bulwarks or impregnable position. [adjective]
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Its walls seemed impregnable; they measured more than seventy-five feet--[Fifty ells. [adjective]
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These buildings formed the citadel, round the threefold walls of which, many centuries before, King Meles had carried a lion in order to render them impregnable. [adjective]
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Instead of endeavoring to render Paris impregnable, try rather to render the loss of Paris an insignificant matter. [adjective]
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As for fire, he believed himself impregnable by that arm; and any day succour might come from the South. [adjective]
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Impregnable Malta surrenders without a shot; his most reckless schemes are crowned with success. [adjective]
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This was impregnable, and admitted of neither objection nor restriction. [adjective]
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His conscience inured to every assault of destiny, might have appeared to be forever impregnable. [adjective]
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