untellable

untellable (http://definr.com/untellable)

     adj : defying expression or description; "indefinable yearnings";
           "indescribable beauty"; "ineffable ecstasy";
           "inexpressible anguish"; "unspeakable happiness";
           "unutterable contempt"; "a thing of untellable
           splendor" [syn: indefinable, indescribable, ineffable,
            unspeakable, unutterable]