Know for a certainty that the LORD your God will no more drive out any of these nations from before you; but they shall be snares and traps unto you, and scourges in your sides, and thorns in your eyes, until ye perish from off this good land which the LORD your God hath given you.
Be sure that God won't remove all these remaining people from your path. Instead, they will act like traps and cause trouble for you, like a painful wound, and be like annoying thorns in your eyes. All this will happen until you are gone from the good land God gave you.