'Annihilated' in the Bible

When Jehu came to Samaria, he struck down all who remained from the house of Ahab in Samaria until he had annihilated his house, according to the word of the Lord spoken to Elijah.

The prophet got angry at him and said, "If you had struck the ground five or six times, you would have annihilated Syria! But now, you will defeat Syria only three times."

Certainly you have heard how the kings of Assyria have annihilated all lands. Do you really think you will be rescued?