There was a Greek word for “priest”. It was used in describing Jewish priests, and used of Jesus as High Priest. It was not used of any Christian office in the congregation...
Yes. The Greek word is hiereus. But we are talking about the English word. Like Greek and Latin, Old English had two separate words for priest: preost and sacerd. The former was used to translate presbuteros and the latter hiereus. Preost continued to be used for the office of presbyter in the form priest. Unfortunately sacerd fell out of English usage and its lack was made up by the use of priest. This secondary definition of priest does not, however, take away its original and continuing meaning for the office of presbyter.