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unfoilable

  • a word derived from foil.
    foil
    verb (used with object)
    to prevent the success of; frustrate; balk.

Example Sentences

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Mr. Pyecroft kept his eyes, for the most part, upon the shrewd, fraud-penetrating features of the unfoilable Mr. Mayfair—his own countenance the most truthful that son of Adam ever wore.

From No. 13 Washington Square by Scott, Leroy