'Separate' in the Bible

Now after these things were done, the captains came to me and said, The people of Israel and the priests and Levites have not kept themselves separate from the people of the lands, but have taken part in the disgusting ways of the Canaanites, the Hittites, the Perizzites, the Jebusites, the Ammonites, the Moabites, the Egyptians, and the Amorites.

So now, give praise to the Lord, the God of your fathers, and do his pleasure; and make yourselves separate from the peoples of the land and from the strange women.