'Certainly' in the Bible

Then the woman whose son [was] the living one spoke to the king because her compassion was aroused for her son, and she said, "Please, my lord, give her the living child, but certainly do not kill him!" The other one [was] saying, "As for me, so for you! Divide [him]!"

I have certainly built a lofty house for you, a place for you to live forever."

from the nations which Yahweh had said to the {Israelites}, "You shall not {marry them}, and they shall not {marry you}. They will certainly turn your heart after other gods." But Solomon clung to them to love.

So Yahweh said to Solomon, "Because this was with you, and you did not keep my covenant and my ordinances which I have commanded you, I will certainly tear the kingdom from you, and I will give it to your servant.

Elijah said, "{As Yahweh of hosts lives}, before whom I stand, I will certainly show myself to him today."