The quality or state of being able to change; the capacity to be altered or transformed.
From 'changeable' plus '-ity' suffix (from Latin suffix '-itas'). The '-ity' ending converts adjectives to abstract nouns expressing the quality they describe.
The English language has at least four near-synonyms for this concept—changeability, mutability, variability, and mutableness—showing how we obsess over capturing the subtle idea that nothing stays the same, especially in philosophical writing.
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