ᴱ√MUKU¹ root. “cacare [Latin], *defecate”
The root ᴱ√MUKU “cacare [Latin = defecate]” appeared in the Qenya Lexicon of the 1910s with derivatives like ᴱQ. múko “dung” and ᴱQ. muqa “filthy” (QL/63). As there are no other roots of similar meaning in Tolkien’s later writing, I think it is worth retaining a Neo-Eldarin root ᴺ√MUK for this purpose.
Reference ✧ QL/63 ✧ MUKU “cacare”