»vatic

From Latin vates, vatic means "prophetic". Merriam-Webster's Word-of-the-Day comment notes: "Some people say only thin lines separate poetry, prophecy, and madness. We don't know if that's generally true, but it is in the case of "vatic." The adjective derives directly from the Latin word "vates," meaning "seer" or "prophet." But that Latin root is in turn distantly related to an Old English word for "poetry," an Old High German word for "madness," and an Old Irish word for "seer" or "poet." "