A term for those (Men and Elves) with naturally embodied spirits, appearing in the essay Athrabeth Finrod ah Andreth written around 1959 (MR/315, VT39/23). It contains the word mi “in” and hröa “body”, but the meaning of the final element of the word is obscure. It might be a nominalized variant -nwë of the perfective participle suffix -nwa (hat tip to Röandil for this suggestion). Several rejected forms of this name (Mirruyainar, Mirroyainar) also appeared (MR/326).
Conceptual Development: In earlier writings, the words Fairondi and Mírondina is used for the same concept (PE17/124; NM/238).
mirroanwi "incarnates, those (spirits) 'put into flesh' "; sg. *mirroanwë (MR:350, VT48:34)