The unclean spirit shouting out to Jesus represents both a verbal challenge and the demon's enmity toward him.
In Mark 5 we read the story of the man with an unclean spirit who lived in the country of the Gerasenes.
For He had been saying to him, ‘Come out of the man, you unclean spirit!’
He equipped them with authority over ‘the unclean spirits’ but no ‘authority’ over their human audience.
The outraged cleric fumed: ‘All that goes for an unclean and unhealthy life.’
Nova and his mother walked to the front door, passing a poorly manicured lawn and rang the faint doorbell on the dirty and unclean porch having fast food takeout bags in their hands.
Along with their involved list of unclean foods they were forbidden to eat, some Jews also had elaborate rituals of hand washing before meals.
Religious texts and law books are modified to describe cow eating as unclean , and beef as well as other meat begins to disappear from the menus for Brahmins and the upper classes.
I am lost, for I am a man of unclean lips, and I live among a people of unclean lips.
There is the convulsed boy foaming at the mouth and the man emerging from the tombs with an unclean spirit.