pertinacy
Per"ti*na*cy, n. Etym: [L. pertinere to pertain. See Pertinence.] Defn: The quality or state of being pertinent; pertinence. [Obs.] Per"ti*na*cy, n. Etym: [L. pertinacia, fr. pertinax. See Pertinacious.] Defn: Pertinacity. [Obs.] Chaucer.
Per"ti*na*cy, n. Etym: [L. pertinere to pertain. See Pertinence.] Defn: The quality or state of being pertinent; pertinence. [Obs.] Per"ti*na*cy, n. Etym: [L. pertinacia, fr. pertinax. See Pertinacious.] Defn: Pertinacity. [Obs.] Chaucer.