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[pur-tn-as-i-tee] /ˌpɜr tnˈæs ɪ ti/
the quality of being pertinacious; persistence.
Origin of pertinacity
1495-1505; < Late Latin pertinācitās, for Latin pertinācia stubbornness, perseverance (> obsolete pertinacy), equivalent to pertināci- (stem of pertināx) steadfast, stubborn + -tās -ty2. See per-, tenacity
firmness, determination, resolution. See perseverance. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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Examples from the Web for pertinacity
Historical Examples
  • But that mild and meek man had a certain strength of pertinacity.

    Within the Law Marvin Dana
  • But she shook her head and rose—angry, which she hid, but also amused at his pertinacity.

  • I think I've shown that by my pertinacity in hunting you down.

    The Black Bag Louis Joseph Vance
  • But the pertinacity of that brass-bound Paul Pry was astonishing.

    Tales Of Hearsay Joseph Conrad
  • "I believe not," said Helen, smiling at the pertinacity of his curiosity.

  • Theirs was a callous, abominable, almost revolting, pertinacity.

    'Twixt Land & Sea Joseph Conrad
  • By pertinacity and vanity in lying, she hit the mark at last.

  • "Divil a taste," said Barny, with inimitable composure and pertinacity.

  • Perth objected to changing his clothing with a pertinacity which provoked the boatswain.

    Down the Rhine Oliver Optic
  • Even Grace was disturbed and perplexed by her daughter's pertinacity.

    Curious, if True Elizabeth Gaskell
Word Origin and History for pertinacity

c.1500, from Middle French pertinacité (early 15c.), from Old French pertinace "obstinate, stubborn," from Latin pertinacem (nominative pertinax) "very firm, tenacious, steadfast, persevering," from per- "very" (see per) + tenax (see tenacious). It drove out earlier pertinacy (late 14c.).

Online Etymology Dictionary, © 2010 Douglas Harper
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