American Heritage Dictionary
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Century Dictionary
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WordNet
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The difficulty--insuperable on ordinary monistic lines--is how all these things got into the germ if no additions ever take place.— Science and Morals and Other Essays
He said he did not think that they were insuperable, and shortly after our conversation he left for England, promising to arrange everything with the Prime Minister and Kitchener Then came his letter, despatched on December 8th, after he had seen his colleagues in the Cabinet Kitchener agrees entirely with your view.— 1914
Many difficulties grew out of it, but still they were not insuperable--a certain clashing of authorities from time to time, and certain jealousy between the one and the other.— London Lectures of 1907
The difficulties of a real bonâ fide junction appear insuperable, and in anything short of that duplicity and dishonesty might give them advantages which though we should not certainly envy, yet we might have much cause to lament.— Memoirs of the Courts and Cabinets of George the Third From the Original Family Documents, Volume 1 (of 2)

American Heritage Dictionary (1)
Century Dictionary (1)
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