'Unclean' in the Bible

Now Joshua was clothed in unclean robes, and he was in his place before the angel.

And he made answer and said to those who were there before him, Take the unclean robes off him, and let him be clothed in clean robes;

In that day there will be a fountain open to the family of David and to the people of Jerusalem, for sin and for that which is unclean.

And it shall come to pass in that day, saith the LORD of hosts, that I will cut off the names of the idols out of the land, and they shall no more be remembered: and also I will cause the prophets and the unclean spirit to pass out of the land.

Every cooking pot in [all the houses in] Jerusalem and in Judah will be holy to the Lord of hosts, and all who sacrifice will come and take them and boil [their sacrifices] in them. And in that day there will no longer be a Canaanite [that is, any godless or spiritually unclean person, whether Jew or Gentile] in the house of the Lord of hosts.