vates
A poet or bard who is divinely inspired.
[Percy Bysshe] Shelley, a true vates, was called upon by their divine influence to render some choice passages from this very Faust, which, from confessed inability, [Francis Leveson-]Gower had left unattempted in his precious version, and some which from other motives he had purposely reticensed.
Where it comes from
From Latin vātēs, from Proto-Indo-European *weh₂t- (“excited, possessed”); cognate with Proto-Celtic *wātis (“seer”) (Gaulish ουατεις, Old Irish fáith, Welsh gwawd) and Proto-Germanic *wōdaz (“mad”) (Old English wōd (“mad, frenzied”), Gothic 𐍅𐍉𐌳𐍃 (wōds, “possessed, mad”), Old High German wuot (“mad, madness”). More at wood (“crazy, mad, insane”) and wode.
Adapted from the Wiktionary entry vates (CC BY-SA 4.0).