Where does “Pertual” come from?

Pertual (Mirandese) comes from Latin Portus Cale, from Latin Portus, from Proto-Italic portus, from Proto-Indo-European pértus, from Proto-Indo-European per-, from Proto-Indo-European pr̥tós — passed , crossed.

Ancestry of “Pertual”, step by step

StepLanguageWordMeaning
1LatinPortus CaleOporto
2LatinPortus” or, later, “Portus Rōmae”}} Portus large artificial harbour of Ancient Rome
3Proto-Italicportusharbour
4Proto-Indo-Europeanpértuscrossing
5Proto-Indo-Europeanper-before, in front; first; to go through
6Proto-Indo-Europeanpr̥tóspassed , crossed
Every word from Proto-Indo-European pr̥tós →Every word from Proto-Indo-European per- →Every word from Proto-Indo-European pértus →