ˌ ̷ ̷ ̷ ̷ˈasəd.ē, -ˈaas-, -sətē, -i noun
( -es )
Etymology: Middle French pertinacité, from Late Latin pertinacitas, from Latin pertinac-, pertinax pertenacious + Middle French -ité -ity — more at pertinacious
: the quality or state of being pertinacious