'Master' in the Bible

Jonathan called out to the servant, "Hurry, be quick, don't stand around." Jonathan's servant picked up the arrow and brought it to his master.

Now, be aware of this and consider what you should do. Calamity is being planned against our master and against his entire household. He's such a worthless person that no one can talk to him."

The Egyptian replied, "I'm a young Egyptian man, the slave of an Amalekite man. My master abandoned me, because I got sick three days ago. We raided the Negev of the Cherethites, the territory that belongs to Judah, and the Negev of Caleb, and we set Ziklag on fire."

David asked him, "Will you take me to this raiding party?" He said, "Swear to me by God that you won't kill me or turn me over to my master, and I'll take you to the raiding party."