Smeddum comes from Old English smedema, smedma ('fine flour, meal'); the Scots dialect sense 'spirited energy, mettle' developed figuratively from the idea of fine, sifted, choice meal as the 'pith' or essence of something. The historical chain includes Old English smedema. Older glosses in the chain include "fine flour, meal", "spirited energy, mettle", and "pith", which help explain the semantic range of the modern word. Morphologically, smeddum 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 "spirited energy, mettle, or resourcefulness (Scots dialect)". The result is an English noun whose etymology preserves the older forms while supporting the word's specialized modern meaning.