The quality or state of being active; liveliness or energetic engagement.
From 'active' (Latin activus, 'inclined to action') + '-ness' (suffix for nouns of quality). A formation following standard English patterns for creating abstract nouns.
The word 'activeness' captures something interesting: it's not just about doing things, but about being *inclined* toward action—it's an energy or readiness. Some people naturally have high activeness; it's almost like a personality trait.
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