'Enemy' in the Bible

They brought the head of Ishbosheth to David to Hebron, and said to the king, "Behold, the head of Ishbosheth, the son of Saul, your enemy, who sought your life! Yahweh has avenged my lord the king this day of Saul, and of his seed."

He delivered me from my strong enemy, from those who hated me, for they were too mighty for me.