A reform siddur, also known as a liberal siddur, is a prayer book with adaptations that reflect modern, progressive values and beliefs. These updates may include gender-inclusive language, new translations, and changes to traditional prayers to better align with contemporary issues and perspectives. Some synonyms for reform siddur might include progressive siddur, modern siddur, or contemporary siddur. They all share the goal of reimagining the siddur to be more relevant and meaningful to modern worshippers. Whether you're looking for a siddur that reflects your personal beliefs or seeking out a more inclusive and diverse prayer experience, a reform siddur can be a refreshing departure from traditional prayer books.