adjective
definition
Holding tenaciously to an opinion or purpose.
definition
Stubbornly resolute or tenacious.
Examples of pertinacious in a Sentence
Apart from his pertinacious fight for economy Hume was not always fortunate in his political activity.
The Cabetes, who possessed the soil, were fierce and pertinacious; and, assisted by the French, who traded to that coast, Coelho had to gain by inches what was granted him by leagues.
But it was on the part of the Dutch that the most skilful and pertinacious efforts were made for securing a footing in Brazil; and they alone of all the rivals of the Portuguese have left traces of their presence in the national spirit and institutions of Brazil.
Extremely pertinacious in this respect, the poet went on attempting to storm the theatre, with assault upon assault, all practically failures until the seventh and last, which was unfortunately posthumous.
She would offer them to people with her politely pertinacious manner and upper-middle-class accent and invariably had good sales.
Passionate, not always scrupulous in his choice and use of political weapons, intensely patriotic, loyal with a loyalty based rather or reason than sentiment, quickwitted, prompt in action, determined and pertinacious, he possessed in eminent degree many qualities lacking in other Liberal chieftains.
In conversation he was a singularly eager, acute and pertinacious disputant.
For this reason, it is called pertinacious, pertinax, because it works away all the time at the same thing.