A word in the Declension of Nouns from the early 1930s with stem form hun- and gloss “earth” (QL/39). It might be a later iteration of ᴱQ. han “ground, earth” from the Qenya Lexicon of the 1910s (QL/39), and if so then hún might also be used as “✱ground”. I think it is useful to assume so for purposes of Neo-Quenya, as the other attested word for “ground”, Q. talan, is probably used more often for “floor”, including floors above the ground level.
Qenya
arda
place name. Earth, world
arda
noun. realm, region
arya
noun. day (twelve hours)
númeheruvi arda sakkante lenéme ilúvatáren
the Lords of the West broke the world by leave of Ilúvatar
harda
noun. realm
ambar
noun. Earth, World
esse
noun. place
hún
noun. earth, earth, *ground
men
noun. place, spot
ména
noun. region
nome
noun. place
vanima
adjective. fair
|1| 2 |3|4|5| |manwe|herunūmen|{herunūmen >>} Nūmekundo|númeheruvi| |ilu|{ilu >> eru >>}|arda| |terhante|{terhante >>} askante|sakkante| | |...|{... >>}|lenéme| | |Ilúvatáren|