'Enemy' in the Bible

They brought Ish-bosheth's head to David at Hebron and told the king, "Look! Here's the head of your enemy Ish-bosheth, Saul's son, who sought your life. Today the LORD has given your majesty the king vengeance on Saul and his descendants."

He rescued me from my strong enemy from those who hate me continually, since they were stronger than I.