A word appearing as ᴱN. blé “fat (n. & adj.) of meat” in Early Noldorin Word-lists of the 1920s, likely derived from some variant of ᴱ✶mḷgo; compare to ᴱN. bliw “oil” on the same page (PE13/139).

Conceptual Development: Possible precursors include the noun G. ilm “oil, fat, grease” and the adjective G. ilbrin “oily, fat, greasy” in the Gnomish Lexicon of the 1910s (GL/50), likely derived from the early root ᴱ√ILI¹ “shine oily” (QL/42).

Neo-Sindarin: I think it is worth retaining ᴺS. blê for purposes of Neo-Sindarin as both an adjective meaning “*fatty, oily, greasy” and a noun meaning “fat (of meat)”, derived from the Neo-Root ᴺ√MILIG “oil”. It could perhaps be from a primitive form m’ligā where the initial ml- became bl- and the e is the result of a-affection of the i to e.