This study aims to review the term “al-'Azimah" which is (a rule in its normal rigorous application) from the perspective of the scholars of Usul al-Fiqh. The study will begin by explaining its concept, the provisions it includes, its relationship to the Rukhsah leniency), and its position in the categories of Shari'ah rulings. The study adopted the analytical method by analyzing the statements of the scholars of Usul al-Fiqh. Moreover, the study followed the comparative approach to realize the areas of agreement and disagreement between the scholars of Usul al-Fiqh. The study explained the uses of 'Azimah by the jurists, the extent of their adherence to the 'Azimah term -from Usul al- Fiqh perspective-, and the effect of the linguistic meaning. Undoubtedly, distinguishing between the jurists' uses of 'Azimah is important for understanding what they mean by the term. The study concluded by listing the jurisprudential effect that results from describing a ruling as 'Azimah, especially in the rulings that the jurists differed in as to whether they were 'Azimah or Rukhsah