maryz,
NT church offices are listed in Greek, along with the office duties/functions. Priest nor priestly function appears in Greek.
The current role of “priest” as appearing in Catholic churches was made up as paganism crept into the church.
priest (n.) Old English preost probably shortened from the older Germanic form represented by Old Saxon and Old High German prestar, Old Frisian prestere, all from Vulgar Latin *prester "priest," from Late Latin presbyter ("presbyter, elder") from Greek presbyteros (see Presbyterian).
You Need an etymoligical dictionary!
And Protestants on FR (with several honorable exceptions) seem to know as little about actual paganism (or paganisms) as they do about Catholicism.