'Sir' in the Bible

She said to her father, “Sir, don’t be angry that I cannot stand up in your presence; I am having my period.” So Laban searched, but could not find the household idols.

They said, “Sir, we really did come down here the first time only to buy food.

But Judah approached him and said, “Sir, please let your servant speak personally to my lord. Do not be angry with your servant, for you are like Pharaoh.