A noun in the Qenya Lexicon of the 1910s glossed “pile” appearing as a derivative of the root ᴱ√KUMU “heap up”, but Tolkien considered transferring it to ᴱ√KUPU “hump” (QL/49).
Early Quenya
kúme
noun. pile, heap; load, burden
kumbe
noun. pile, heap; load, burden
kum-
verb. to pile up
kumpo
noun. pile
A verb appearing as kumin “I pile up” in the Qenya Lexicon of the 1910s under the early root ᴱ√KUMU “heap up” (QL/49).