Main Entry: per·ti·na·cious

Pronunciation: \ˌpər-tə-ˈnā-shəs\

Function: adjective

Etymology: Latin pertinac-, pertinax, from per- thoroughly + tenac-, tenax tenacious, from tenēre

Date: 1626

1 a : adhering resolutely to an opinion, purpose, or design b : perversely persistent
2 : stubbornly tenacious

synonyms see obstinate

— per·ti·na·cious·ly adverb

— per·ti·na·cious·ness noun

— per·ti·nac·i·ty \-ˈna-sə-tē\ noun