The quality or state of being pertinacious: "Again and again ... with the inexorable pertinacity of a child ... did he renew his efforts” ( Nathaniel Hawthorne). (noun)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "pertinacity" in a sentence
"The forward cylinder was depending on that unknown force men call the pertinacity of materials, which now and then balances that other heartbreaking power, the perversity of inanimate things."
"Certainly, if the confederates of this roving gipsy were so pertinacious in tormenting poor weak Mr. Mompesson, their pertinacity is a most extraordinary instance of what revenge is capable of."
"Under the seal of confession he had been intrusted with a secret to which in his conversations with me he could make only indirect allusions, to bring me to understand that my pertinacity was a crime, and that the only honourable course was to yield."