The quality of being fancy; the degree of stylishness, elaborateness, or decorative ornamentation something possesses.
From the adjective 'fancy' plus the noun-forming suffix '-ness.' This creates an abstract noun that captures the quality of being elaborate and stylish.
Every adjective in English can become a noun by adding '-ness'—happiness, darkness, fakeness—and we created 'fanciness' to talk about the abstract idea of being fancy, not just fancy objects!
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