The state or quality of having undergone change; the condition of being changed or altered.
From 'changed' (past participle of 'change') plus '-ness' suffix. This formation treats the past participle as an adjective, then nominalizes it, a productive pattern in English.
Philosophical and literary writing loves nominalized adjectives like 'changedness'—they let authors treat abstract concepts like 'the changedness of human nature' as concrete nouns you can discuss and contemplate, turning fleeting ideas into objects of thought.
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