a. [f. QUACK sb.1 + -ISH.] Of the nature of a quack or quackery.

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1732.  Hist. Litteraria, III. 558. To complete his quackish Farce [he] spread printed Bills all over Paris.

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1790.  Burke, Fr. Rev., 198. All the arts of quackish parade.

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1800.  Monthly Mag., XIII. 131. Regular, not quackish innovating practitioners.

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1865.  Sat. Rev., Nov., 570. Another … confounds preaching the Gospel with a quackish interpretation of prophecies.

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  Hence Quackishly adv.

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1816.  J. Gilchrist, Philos. Etym., 119. Do not let them … quackishly boast of new light and great discovery.

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