A constitution is said to be rigid if it

A constitution is said to be rigid if it is difficult to amend. A rigid constitution typically requires a complex amendment process involving multiple steps and broad support from various branches of government or the population. This is in contrast to a flexible or "unwritten" constitution, which can be easily amended through legislative or executive action. A constitution that is decreed by soldiers, on the other hand, is typically considered an authoritarian constitution, rather than a rigid or flexible one.