'Really' in the Bible

For we have, all alike, become sharers with Christ, if we really hold our first confidence firm to the End;

For who heard and rebelled? Wasn’t it really all who came out of Egypt under Moses?

For although, considering the long time you have been believers, you ought now to be teachers of others, you really need some one to teach you over again the very rudiments of the truths of God, and you have come to require milk instead of solid food.