'Servant' in the Bible

Then sitting down He called the Twelve, and said to them, "If any one wishes to be first, he must be last of all and servant of all."

but it is not to be so among you. No, whoever desires to be great among you must be your servant;

Again he sent to them another servant: and as for him, they wounded him in the head and treated him shamefully.

But one of those who stood by drew his sword and struck a blow at the High Priest's servant, cutting off his ear.