Ouija boardyoudaoicibaDictYouDict[Ouija board 词源字典]
"A board with letters, numbers, and other signs around its edge, to which a planchette, movable pointer, or upturned glass moves, supposedly in answer to questions from people at a seance", Late 19th century: of uncertain origin: possibly from French oui 'yes' + German ja 'yes'.[Ouija board etymology, Ouija board origin, 英语词源]