ᴱ√MṆGṆ root. “*butter”
An unglossed root ᴱ√MṆGṆ appeared in the Qenya Lexicon of the 1910s with derivatives ᴱQ. mange “grease” and ᴱQ. manya “butter” (QL/62). G. mang “butter” from the contemporaneous Gnomish Lexicon is also almost certainly related (GL/56). In Qenya Word-lists from the 1920s Tolkien gave ᴱQ. mingwe “butter” which may be related (PE16/141).
Neo-Eldarin: For purposes of Neo-Eldarin, I think it is worth positing a root ᴺ√MANG(Y)A to salvage early “butter” words.
Reference ✧ QL/62