μυστήριον

hidden thing, secret, mystery, generally mysteries, religious secrets, confided only to the initiated and not to ordinary mortals, a hidden or secret thing, not obvious to the understanding, a hidden purpose or counsel, secret will, of men, of God the secret counsels which govern God in dealing with the righteous, which are hidden from ungodly and wicked men but plain to the godly, in rabbinic writings, it denotes the mystic or hidden sense, of an OT saying, of an image or form seen in a vision, of a dream