Relating to or resembling an enigma; not easily explained or accounted for; darkly expressed; not clear to the understanding; obscure; puzzling; as, an enigmatical answer; I didn't grasp the meaning of that enigmatical comment until much later; prophetic texts so enigmatical that their meaning has been disputed for centuries.

resembling an oracle in obscurity of thought; "the oracular sayings of Victorian poets"; "so enigmatic that priests might have to clarify it"; "an enigmatic smile"