1. the quality or state of being unable to be changed, modified, or altered
Usage: formal; abstract noun

Examples

• The inalterability of the laws of physics makes them reliable for scientific prediction.
• She believed in the inalterability of human nature.
• The contract's inalterability meant that neither party could modify its terms without mutual consent.
• The inalterability of the past is a common theme in philosophy.
• Some argue that the Constitution's inalterability protects fundamental rights.
• The inalterability of genetic code determines much of our biological traits.