Strong G169 ἀκάθαρτος akathartos · unclean

Matthew

1. Matthew 10:1
   And when he had called unto him his twelve disciples, he gave them power against unclean spirits, to cast them out, and to heal all manner of sickness and all manner of disease.
2. Matthew 12:43
   When the unclean spirit is gone out of a man, he walketh through dry places, seeking rest, and findeth none.