pertinacity

noun

the quality of being pertinacious; persistence.

Origin:
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

Synonyms
firmness, determination, resolution. See perseverance.

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Based on the Random House Dictionary, © Random House, Inc. 2013.
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Link To pertinacity

Collins

World English Dictionary

pertinacious (ˌpɜːtɪˈneɪʃəs)

—*adj*
1.	doggedly resolute in purpose or belief; unyielding
2.	stubbornly persistent

[C17: from Latin pertināx, from per- (intensive) + tenāx clinging, from tenēre to hold]

perti'naciously

—*adv*

pertinacity

—n

perti'naciousness

—n

Collins English Dictionary - Complete & Unabridged 10th Edition
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00:10

Pertinacity is always a great word to know.

So is bezoar. Does it mean:

an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle.

a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison.

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Etymonline

Word Origin & History

pertinacity

1504, from M.Fr. pertinacité (1419), from O.Fr. pertinace "obstinate," from L. pertinacem (nom. pertinax) "very firm, tenacious," from per- "very" + tenax (see tenacious).

Online Etymology Dictionary, © 2010 Douglas Harper
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Example sentences

These companies became bitter rivals and contested the barbaric field with obstinate pertinacity.

Figuratively, one who follows up an enemy with pertinacity.

Since outsiders have not always agreed, their history has been tumultuous, but their pertinacity has also been rewarded.

Insisting with dogged pertinacity upon the dogma of the prophet, that it is sinful to yield obedience to infidels.

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Related Words

perseverance

stubborn

Matching Quote

"I am astonished at the singular pertinacity and endurance of our lives. The miracle is, that what is is, when it is so difficult, if not impossible, for anything else to be; that we walk on in our particular paths so far, before we fall on death and fate, merely because we must walk in some path; that every man can get a living, and so few can do anything more. So much only can I accomplish ere health and strength are gone, and yet this suffices."

-Henry David Thoreau

pertinacity

per·ti·nac·i·ty