pertinaciter

pertinaciter is a Latin form of pertinax, meaning “persistent, stubborn, obstinate”. It is the adverb.

Found 48 times in the Latin texts on Socratos.

Where it is used

Caesar, De Bello Gallico 8.41.3: Oppidani enim loco superiore decurrunt et eminus sine periculo proeliantur multosque pertinaciter succedentes vulnerant; non deterrentur tamen milites nostri vineas proferre et labore atque operibus locorum vincere difficultates.

All forms of pertinax (declension table)

Source: Socratos (socratos.org), a free reader for Ancient Greek and Latin. Grammar from the Perseus Treebank and Morpheus; dictionary entries from Lewis & Short, A Latin Dictionary (Perseus Digital Library, CC BY-SA). Counts are from the texts on Socratos.