pertinacity

Noun

pertinacity (usually uncountable, plural pertinacities)

1. (usually) The state or characteristic of being pertinacious.
   • With my aversion to this cat, however, its partiality for myself seemed to increase. It followed my footsteps with a pertinacity which it would be difficult to make the reader comprehend.1846, Edgar Allen Poe, The Black Cat
   • Again and again, however, and half a dozen other agains, with the inexorable pertinacity of a child intent upon some object important to itself, did he renew his efforts for admittance.1851 April 9, Nathaniel Hawthorne, The House of the Seven Gables, a Romance, Boston, Mass.: Ticknor, Reed, and Fields, →OCLC

   Synonyms:

   pertinaciousness, resolve, stubbornness, tenacity