'Servant' in the Bible

Moses said to Yahweh, "Why have you treated with your servant so badly? Why haven't I found favor in your sight, that you lay the burden of all this people on me?

Joshua the son of Nun, the servant of Moses, one of his chosen men, answered, "My lord Moses, forbid them!"

My servant Moses is not so. He is faithful in all my house.

With him I will speak mouth to mouth, even plainly, and not in riddles; and he shall see Yahweh's form. Why then were you not afraid to speak against my servant, against Moses?"

but my servant Caleb, because he had another spirit with him, and has followed me fully, him will I bring into the land into which he went; and his seed shall possess it.