1495-1505; < Late Latinpertinācitās, for Latinpertinācia stubbornness, perseverance (> obsolete pertinacy), equivalent to pertināci- (stem of pertināx) steadfast, stubborn + -tās-ty2. See per-, tenacity
Insisting with dogged pertinacity upon the dogma of the prophet, that it is sinful to yield obedience to infidels.
Since outsiders have not always agreed, their history has been tumultuous, but their pertinacity has also been rewarded.
The horde of office-seekers is remarkable for number and pertinacity.
Figuratively, one who follows up an enemy with pertinacity.
These companies became bitter rivals and contested the barbaric field with obstinate pertinacity.
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.).