ontōs

(Translation from NRSV with a few modifications for a more literal meaning)

Mark

11: 32

But shall we say, 'Of human origin'?" - they were afraid of the crowd, for all regarded John as really (ontōs) a prophet.

Luke

23: 47	When the centurion saw what had taken place, he praised God and said, "Really (ontōs), this man was innocent."
24: 34	They were saying that the Lord has really (ontōs) risen, and he has appeared to Simon!"

John

8: 36

So if the Son makes you free, you will be really (ontōs) free.