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Elsewhere on the web
It's almost impenetrable, and it's mounted with all sorts of weapons.— Aussie-Nintendo.com Forums
The constitutions of totalitarian states are always unreadable, impenetrable -- and very long.— The Full Feed from HuffingtonPost.com
The white man himself was impenetrable--impenetrable to persuasion, coaxing, abuse; to soft words and shrill revilings; to desperate beseechings or murderous threats; for Mrs. Almayer, in her extreme desire to persuade her husband into an alliance with Lakamba, played upon the whole gamut of passion.— Almayer's Folly: a story of an Eastern river
Go not to the Alhambra: the fort is impenetrable -- the guard faithful.— Leila or, the Siege of Granada, Complete
The pawnbroker was impenetrable, and the lawyer was compelled reluctantly to dismiss him.— Paul Clifford — Volume 04
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