\Per"ti*na*cy\, n. [L. pertinere to pertain. See
{Pertinence}.]
The quality or state of being pertinent; pertinence. [Obs.]

\Per"ti*na*cy\, n. [L. pertinacia, fr. pertinax. See
{Pertinacious}.]
Pertinacity. [Obs.] --Chaucer.