In the Bible, the term "​unclean"​ is used figuratively to refer to things that God declared to be unfit for his people to touch, eat, or sacrifice.
* God gave the Israelites instructions about which animals were "​clean"​ and which ones were "​unclean."​ The unclean animals were not permitted to be used for eating or for sacrifice.
* The term "unclean" could also be translated as "not clean" or "unfit in God's eyes" or "physically unclean" or "defiled."
* When referring to a demon as an unclean spirit, "unclean" could be translated as "evil" or "defiled."
* The translation of this term should allow for spiritual uncleanness. It should be able to refer to anything that God declared as unfit for touching, eating, or sacrifice.