The state, quality, or process of being coactive; the characteristic of acting or functioning together in cooperation.
From 'coactive' + '-ity' (Latin-derived suffix forming abstract nouns). The '-ity' suffix transforms adjectives into nouns representing their essential quality, as in quality itself, reality, and creativity.
Abstract nouns ending in '-ity' are among the most formal, scientific-sounding words in English, which is why they're common in academic writing—they make observations sound more objective and systematic.
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