五柱 (Wǔzhù) refers to the Five Pillars of Islam, which are fundamental acts of worship and the foundation of a Muslim's faith and practice. These pillars include the declaration of faith (Shahada), prayer (Salah), almsgiving (Zakat), fasting during Ramadan (Sawm), and pilgrimage to Mecca (Hajj). Each pillar represents a key aspect of a Muslim's relationship with Allah and the Islamic community. The Five Pillars serve as a guide for Muslims to live a life of devotion and obedience. They emphasize the importance of faith, community support, self-discipline, and spiritual growth. By adhering to these principles, Muslims strengthen their connection to Islam and fulfill their religious obligations.