the word 'tackiness' is a modern english formation built upon the adjective 'tacky'. 'tacky' itself has a dual etymology. its primary sense of 'sticky' derives from 'tack', a term for a small, sharp nail, which metaphorically extended to the idea of something that adheres or is sticky, akin to the feeling of fresh varnish. its secondary sense of 'vulgar' or 'in poor taste' emerged in 19th-century american english, possibly influenced by 'tacky' meaning a poor white person or a shabby horse, though its exact path is debated. the suffix '-ness', of germanic origin, is a prolific english noun-forming element that converts the adjective into an abstract noun denoting the state or quality of being tacky. thus, 'tackiness' logically encapsulates either a physical property of adhesion or a perceived aesthetic deficiency.

Structure: tacky (sticky/vulgar) + ness (noun suffix) tacky (origin: english, from 'tack' meaning a small nail or sticky quality; functional role: adjective root conveying the core meaning) + ness (origin: old english '-nes'; functional role: suffix forming abstract nouns indicating a state or quality)