G3466–μυστήριον–mustērion

"There shall be no further delay; but in the days when the seventh angel blows his trumpet--when he begins to do so--then the secret purposes of God are realized, in accordance with the good news which He gave to His servants the Prophets."

μυστήριον mustērion “mystery”

And on her forehead was a name written: "I am a symbol of great Babylon, the mother of the harlots and of the abominations of the earth."

μυστήριον, mustērion “a mystery:”

Then the angel said to me, "Why are you so astonished? I will explain to you the secret meaning of the woman and of the seven-headed, ten-horned Wild Beast which carries her.

μυστήριον mustērion “mystery”