A word for “house” in the Qenya Lexicon of the 1910s under the early root ᴱ√IŘI [IÐI] “dwell” (QL/43). It also appeared in the contemporaneous Poetic and Mythological Words of Eldarissa (PME/43).
Early Quenya
mardo
noun. dweller
indo
noun. house
mar-
verb. to get ripe, come to ripeness, get ready, grow up, get mellow
A noun appearing as ᴱQ. mardo “dweller” in the Qenya Lexicon of the 1910s, apparently an agental form of ᴱQ. mar “dwelling” (QL/60).
Neo-Quenya: Since Q. mar(da) “dwelling” appears in Tolkien’s later writing (PE17/64, 107), I would keep ᴺQ. mardo “dweller” as well.