pertinaciously

adv

Etymology: From pertinacious + -ly, from Latin pertināx, from per- (“very”) + tenāx (“tenacious”), from teneō (“to hold”).

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.”