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From pertinace +‎ -ious, from Old French pertinace, from Latin pertinax, from per- (very) + tenax (tenacious).



pertinacious (comparative more pertinacious, superlative most pertinacious)

  1. Holding tenaciously to an opinion or purpose.
    • 1884, Henry James, "The Path of Duty" in The English Illustrated Magazine 2(15): 240–256.
      He would really have to make up his mind to care for his wife or not to care for her. What would Lady Vandeleur say to one alternative, and what would little Joscelind say to the other? That is what it was to have a pertinacious father and to be an accommodating son.
    • 1887, H. Rider Haggard, She: A History of Adventure[1]:
      For, whether they were attracted by the lantern, or by the unaccustomed smell of a white man for which they had been waiting for the last thousand years or so, I know not; but certainly we were presently attacked by tens of thousands of the most blood-thirsty, pertinacious, and huge mosquitoes that I ever saw or read of.
  2. Stubbornly resolute or tenacious.


Related terms[edit]