'Sir' in the Bible

Jael went out to greet Sisera. "Turn aside, sir!" she told him. "Turn aside to me! Don't be afraid." So he turned aside to her and entered her tent, where she concealed him behind a curtain.

Gideon said to Him, “Please Sir, if the Lord is with us, why has all this happened? And where are all His wonders that our fathers told us about? They said, ‘Hasn’t the Lord brought us out of Egypt?’ But now the Lord has abandoned us and handed us over to Midian.”

"Right"," Gideon responded. "Sir, how will I deliver Israel? Look my family is the weakest in Manasseh, and I'm the youngest in my father's household."