'Really' in the Bible

If only it would really be their desire to fear me and obey all my commandments in the future, so that it may go well with them and their descendants forever.

And it hath been -- if thou really forget Jehovah thy God, and hast gone after other gods, and served them, and bowed thyself to them, I have testified against you to-day that ye do utterly perish;

Then I saw how you had really sinned against the LORD your God! You had made for yourselves a calf, a cast idol. You had turned aside quickly from the way that the LORD your God had commanded.

Instead, he must acknowledge the firstborn of the unloved wife by giving him double of everything he owns, because he is really the first fruit of his father's strength. The right of the firstborn belongs to him."