'fluffiness' originates from English, specifically the word 'fluffy', where the suffix '-ness' meant 'state or quality'.

'fluffiness' changed from the adjective 'fluffy' (itself formed from the noun 'fluff' + the adjectival suffix '-y') and eventually became the modern English noun 'fluffiness' with the addition of '-ness'.

Initially, it referred to the physical quality of loose tufts or fibers ('fluff'), but over time it broadened to mean the general quality of being soft and airy and, figuratively, a lack of substantive content.