τά γε μὰν λίνα πάντα λελοίπει ἐκ Μοιρᾶν → but all the thread granted him by the Fates had run out
(1) arcānum,¹¹ ī, n. (arcanus), secret : Hor. O. 1, 18, 16 ; Ov. M. 7, 192, etc.
arcanum arcani N N :: secret, mystery; secret/hidden place