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

Examples

• The inalterableness of the laws of physics makes them reliable for scientific prediction.
• She believed in the inalterableness of her moral principles.
• The inalterableness of the past is a common theme in philosophy.
• He spoke of the inalterableness of human nature with conviction.
• The contract's inalterableness was guaranteed by the legal agreement.