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WordReference Random House Unabridged Dictionary of American English © 2024per•ti•nac•i•ty (pûr′tn as′i tē),USA pronunciation n. - the quality of being pertinacious;
persistence.
- Late Latin pertinācitās, for Latin pertinācia stubbornness, perseverance ( obsolete pertinacy), equivalent. to pertināci- (stem of pertināx) steadfast, stubborn + -tās -ty2. See per-, tenacity
- 1495–1505
firmness, determination, resolution. See perseverance. WordReference Random House Learner's Dictionary of American English © 2024per•ti•na•cious /ˌpɜrtəˈneɪʃəs/USA pronunciation adj. - holding tightly to a purpose, course of action, or opinion; resolute:a pertinacious investigator who pursued every lead.
per•ti•na•cious•ly, adv. per•ti•nac•i•ty /ˌpɜrtənˈæsɪti/USA pronunciation n. [uncountable]See -tain-. WordReference Random House Unabridged Dictionary of American English © 2024per•ti•na•cious (pûr′tn ā′shəs),USA pronunciation adj. - holding tenaciously to a purpose, course of action, or opinion;
resolute. - stubborn or obstinate.
- extremely or objectionably persistent:a pertinacious salesman from whom I could not escape.
- pertinaci(ty) + -ous 1620–30
- 1.See corresponding entry in Unabridged persevering.
- 2.See corresponding entry in Unabridged dogged.
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