'Servant' in the Bible

Then said Boaz unto his servant that was set over the reapers, Whose damsel is this?

And the servant that was set over the reapers answered and said, It is the Moabitish damsel that came back with Naomi out of the country of Moab:

She responded, "May I continue to find favor in your sight, sir, since you've been comforting me and you have spoken graciously to your servant, even though I am not one of your servants."

And Naomi said to Ruth, her daughter-in-law, It is better, my daughter, for you to go out with his servant-girls, so that no danger may come to you in another field.

So she kept near the servant-girls of Boaz to take up the grain till the cutting of the early grain and the cutting of the late grain were ended; and she went on living with her mother-in-law.

He asked her, "Who are you?" She answered, "I'm only Ruth, your servant. Spread the edge of your garment over your servant, because you are my related redeemer."