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Webster 1913 Edition

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Adj.

Of or like a charlatan; making undue pretension; empirical; pretentious; quackish.

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Charˊla-tan′ic-al-ly

adv.

Adj.

Quackish; making undue pretensions to skill; ignorant.

charlatanical ‎(comparative more charlatanical, superlative most charlatanical)