Tsavah means to command, order, charge, or appoint. It appears about 495 times. It describes authoritative commands from God, kings, or leaders. God's commands carry absolute authority.
God commands and it must be done. The verb appears throughout the Torah establishing divine law. 'The LORD commanded Moses' is a repeated formula grounding Israel's laws in divine authority. Human obedience to God's tsavah is the essence of covenant faithfulness.