Pertinacious Definition

pûrtn-āshəs
adjective
Holding firmly to some purpose, belief, or action, often stubbornly or obstinately.
Webster's New World
Hard to get rid of; unyielding; persistent.
Webster's New World
Wiktionary

Origin of Pertinacious

  • From Latin pertināx pertināc- per- per- tenāx tenacious (from tenēre to hold ten- in Indo-European roots)

    From American Heritage Dictionary of the English Language, 5th Edition

  • From Latin pertinax; per- "˜very' + tenax "˜tenacious'.

    From Wiktionary

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