'Enemy' in the Bible

Then they brought the head of Ish-bosheth to David at Hebron and said to the king, “Behold, the head of Ish-bosheth the son of Saul, your enemy, who sought your life; thus the Lord has given my lord the king vengeance this day on Saul and his descendants.”

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