A verb appearing as ᴱQ. mul- “grind” in the Qenya Lexicon of the 1910s under the early root ᴱ√MULU “grind (fine)” (QL/63). In a nearby comparative list of roots it was given as mulu- “grind”.
Neo-Quenya: The 1968 word Q. mulë “meal” (PE17/115) indicates ✱√MUL survived in Tolkien’s later writing, so I would retain ᴺQ. mul- “to grind” for purposes of Neo-Quenya.
A verb appearing as ᴱQ. mard- “grind, pulverize” in the Qenya Lexicon of the 1910s under the early root ᴱ√MṚÐṚ (QL/63), where syllabic ṛ became ar as usual before a dental consonant (PE12/11). In a nearby comparison list of roots it was given as marda- “grind” (QL/63/11).