He had also, with great pertinacity, made himself a writer.
From the telegraph.co.uk
Pertinacity and fiery energy, in their eyes, outweighed everything else, and Hoche soon showed that he possessed these qualities.
From the en.wikipedia.org
The latter contended that the convention should be held in November, 1842, while the former urged with great pertinacity, and succeeded, that it should be postponed until May, 1844.
From the economist.com
More surprising than the pertinacity of sixty-year-old television technology a decade after the development of digital TV is the endurance of film photography.
From the theatlantic.com
He never forgave Sir Robert Dillon for the pertinacity with which he prosecuted his family, and in the summer of 1591 he formally accused him of maladministration of justice.
From the en.wikipedia.org
More examples
Doggedness: persistent determination
(pertinacious) dogged: stubbornly unyielding; "dogged persistence"; "dour determination"; "the most vocal and pertinacious of all the critics"; "a mind not gifted to discover truth but tenacious to hold it"- T.S.Eliot; "men tenacious of opinion"
The state or characteristic of being pertinacious
The quality or condition of being pertinacious; stubborn persistence; obstinacy.
Hyperdictionary.com says "persistent determination". In Galactic PatrolSmith uses it in "But finally, through sheer, grim, bull-dog pertinacity, he was successful."