Where does “pertinaz” come from?

pertinaz (Portuguese) comes from Latin pertināx, from Latin pertineō, from Latin per, from Latin Ad, from Latin illic, from Latin ille, from Latin olle, from Proto-Italic *olnos — that.

pertinaz (Portuguese): pertinacious; obstinate; persistent

Definitions

  1. pertinacious; obstinate; persistent

Ancestry of “pertinaz”, step by step

StepLanguageWordMeaning
1Latinpertināxpersevering, obstinate
2Latinpertineōto extend, stretch out, reach, matter
3Latinperthrough, by means of; throughout, during
4LatinAdtoward, to
5Latinilliche, she, it, yonder, that, overthere; in that...
6Latinillethat; those; "; demonstrative pronoun "; that...
7LatinolleArchaic form of ille
8Proto-Italic*olnosthat
Every word from Proto-Italic *olnosEvery word from Latin olleEvery word from Latin ille