'Unclean' in the Bible

And kept safe Lot, the upright man, who was deeply troubled by the unclean life of the evil-doers

But specially those who go after the unclean desires of the flesh, and make sport of authority. Ready to take chances, uncontrolled, they have no fear of saying evil of those in high places:

For with high-sounding false words, making use of the attraction of unclean desires of the flesh, they get into their power those newly made free from those who are living in error;

For if, after they have got free from the unclean things of the world through the knowledge of the Lord and Saviour Jesus Christ, they are again taken in the net and overcome, their last condition is worse than their first.