'Annihilate' in the Bible

because my angel will go ahead of you and will bring you to the Amorites, the Hittites, the Perizzites, the Canaanites, the Hivites, and the Jebusites, and I'll annihilate them.

Why should the Egyptians speak, and say, For misfortune he has brought them out, to slay them on the mountains, and to annihilate them from the face of the earth? Turn from the heat of thine anger, and repent of this evil against thy people!