In the Bible, "unclean spirits" refer to spiritual entities associated with impurity, evil, and demonic influence. The term is often used interchangeably with "demons" and signifies beings that oppose God and seek to lead humans away from righteousness. The Hebrew term for unclean spirits is often translated as "evil spirits" (e.g., in Leviticus 11:24-25, where certain animals are deemed unclean), while the Greek term "ἀκάθαρτος πνεῦμα" (akathartos pneuma) appears in the New Testament, particularly in the Gospels, to describe these malevolent forces. For example, in Mark 1:23-26, Jesus encounters a man with an unclean spirit in the synagogue, demonstrating His authority over such entities.The presence of unclean spirits is indicative of a spiritual warfare context within Scripture. They are depicted as afflicting individuals, causing physical and mental distress (as seen in Matthew 9:32-33 and Luke 8:2). Jesus' ministry included casting out unclean spirits, which not only demonstrated His divine authority but also symbolized the coming of the Kingdom of God, where such evil influences would be defeated (Luke 10:17-20). The cleansing of unclean spirits signifies the restoration and healing that God offers to humanity, emphasizing the transformative power of faith and the necessity of vigilance against spiritual corruption (Ephesians 6:12).