Shabbiness comes from shabby plus -ness; shabby derives from the dialectal noun shab ('scab; a low fellow'), from Old English sceabb ('scab'), from Proto-Germanic *skab- ('to scrape'). The historical chain includes Old English sceabb and Proto-Germanic *skab-. Older glosses in the chain include "scab; a low fellow", "scab", and "to scrape", which help explain the semantic range of the modern word. Morphologically, shabbiness is best read as borrowing, yielding an English noun shaped by both form history and later usage. In current English it functions as a noun, with the sense "the state of being worn, dingy, or meanly shabby". related forms include shabby and shab. The result is an English noun whose etymology preserves the older forms while supporting the word's specialized modern meaning.