Where does “portero” come from?

portero (Old Spanish) comes from Late Latin portarius, from Latin porta, from Proto-Indo-European per-, from Proto-Indo-European pr̥tós — passed , crossed.

Ancestry of “portero”, step by step

Step	Language	Word	Meaning
1	Late Latin	portarius	doorkeeper”, “gatekeeper; gatekeeper; porter,...
2	Latin	porta	gate, especially of a city; entrance, passage,...
3	Proto-Indo-European	per-	before, in front; first; to go through
4	Proto-Indo-European	pr̥tós	passed , crossed

Words derived from “portero”

portero
exportero

Every word from Proto-Indo-European pr̥tós →Every word from Proto-Indo-European per- →Every word from Latin porta →