Where does “pertinent” come from?

pertinent (Old French) comes from Latin pertinens, from Latin pertineō, from Latin per, from Latin Ad, from Latin illic, from Latin ille, from Latin olle, from Proto-Italic *olnos — that.

Ancestry of “pertinent”, step by step

StepLanguageWordMeaning
1Latinpertinensextending; pertaining
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

Words derived from “pertinent

Every word from Proto-Italic *olnosEvery word from Latin olleEvery word from Latin ille