Unprocessed, as it arrived. Raw material is the honest ground everything refined must be traceable back to.
Old English hreaw (uncooked, unprepared), from Proto-Germanic hrawaz, from a Proto-Indo-European root meaning raw flesh; raw meant unprepared food long before it meant unprocessed data, and the sense has travelled with barely a bend.
Unprocessed, exactly as it arrived. The root's uncooked meat is a useful image: raw material is the honest ground everything refined must still be traceable back to.