ÆNIGMA denotes any dark saying, wherein some well-known thing is concealed under obscure language. The word is Greek, Ανίγμα, formed of ανίγναι, obscure in- nate, to hint a thing darkly, and of αὐτὸ, an obscure speech or discourse. The popular name is riddle; from the Belgic raeden, or the Saxon aræthan, to interpret.