When a constitution contains complicated and long procedures for its amendments, it is said to be

When a constitution contains complicated and long procedures for its amendments, it is said to be "rigid." A rigid constitution is one that is difficult to amend, requiring special and often lengthy procedures to make changes to it. This is done to ensure that the fundamental principles and rights enshrined in the constitution are protected from arbitrary or frequent amendments, and that any changes made are carefully considered and agreed upon by a wide range of stakeholders. Countries with rigid constitutions typically require a supermajority vote or other complex procedures to amend them, as opposed to flexible constitutions which can be easily amended by a simple majority vote.