perfidious

Part of speech:

Treacherous.

Part of speech: adverb

Perfidiously.

Part of speech: noun

PERFIDIOUSNESS.

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Usage examples "perfidious":

  1. 109, 4. la perfide Albion- perfidious Albion. - "The Martian", George Du Maurier.
  2. The savages could be perfidious themselves, but they were not without a conception of honour and felt genuine respect for a white man whose word they could trust. - "The Fighting Governor A Chronicle of Frontenac", Charles W. Colby Edited by George M. Wrong and H. H. Langton.
  3. Having seized on power by perfidious means, he throughout his whole reign strove to dazzle the French by a series of adventures, which indeed pleased the Parisians for the time, but at the cost of lasting distrust among the Powers. - "The Development of the European Nations, 1870-1914 (5th ed.)", John Holland Rose.