A constitution that is difficult to amend is called "rigid". This means that the process for changing the constitution is deliberately made difficult and requires a high level of consensus or agreement among the governing bodies or the citizens. In some cases, it may even require a referendum or a constitutional convention to make changes.
Rigid constitutions are designed to protect fundamental principles and rights from being easily changed by the government or ruling party. They are often written and codified, meaning that the constitution is a formal document that is separate from other laws and is more difficult to change.
This is different from a "flexible" constitution, which is easier to amend and allows for changes to be made more quickly and easily. Flexible constitutions are often unwritten and based on traditions and customs rather than formal documents.
Overall, a rigid constitution can provide greater stability and protection for citizens' rights, but can also make it difficult to adapt to changing circumstances or address pressing issues.