Islamic law strictly prohibits numerous major actions, with the most severe infractions traditionally encompassing shirk (associating partners with God), unlawful killing, practicing magic, consuming usury (riba), consuming intoxicants like alcohol, illicit sexual relations (zina), fleeing from battle, falsely accusing chaste women, misappropriating the property of orphans, and showing disrespect or disobedience toward one's parents. These grave prohibitions form the foundation of Islamic moral ethics, designed to protect human life, property, family structures, and spiritual purity.