'Unclean' in the Bible

And I saw out of the mouth of the dragon, and out of the mouth of the beast, and out of the mouth of the false prophet, three unclean spirits, as frogs;

And the woman was clothed in purple and scarlet, and had ornaments of gold and precious stones and pearls, having a golden cup in her hand full of abominations and the unclean things of her fornication;

And he cried with a strong voice, saying, Great Babylon has fallen, has fallen, and has become the habitation of demons, and a hold of every unclean spirit, and a hold of every unclean and hated bird;