priest (n.) Look up priest at
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).

An alternative theory (to account for the -eo- of the Old English word) makes it cognate with Old High German priast, prest, from Vulgar Latin *prevost "one put over others," from Latin praepositus "person placed in charge," from past participle of praeponere (see provost). In Old Testament sense, a translation of Hebrew kohen, Greek hiereus, Latin sacerdos.