'Certainly' in the Bible

Then the men in the boat began to worship Jesus, saying, "You certainly are the Son of God!"

Because God said, "You are to honor your father and your mother,' and, "Whoever curses father or mother must certainly be put to death.'

because at that time there will be great suffering, the kind that hasn't happened from the beginning of the world until now and certainly won't ever happen again.

But Peter told him, "Even if everyone else turns against you, I certainly won't!"

When the centurion and those guarding Jesus with him saw the earthquake and the other things that were taking place, they were terrified and said, "This man certainly was the Son of God!"