pertinaciously

adv

1. In a stubbornly resolute manner; tenaciously holding one's course of action or opinion.

   “Saint Augustine makes this difference betweene an heretike, and him that beleeves an heretike. The first begets or followes an errour pertinaciously.”

   “They shall therefore suffer punishment who reject this heavenly Light, and continue pertinaciously fix'd in those deadly principles which extinguish all knowledge of Virtue.”

   “No astronomical fallacy is more untenable, and none has been more pertinaciously adhered to, than that of the absolute illimitation of the Universe of Stars.”

   “I work with might and main against his Immigration Bill—as pertinaciously and as vindictively, indeed, as he works against our University.”

   “If the great comedian [Charlie Chaplin] wishes to stay here in the country whose citizenship he has so pertinaciously retained, he will be less harassed and very welcome.”