A noun in The Etymologies of the 1930s glossed “hump” derived from the root ᴹ√TUMPU of the same meaning (Ety/TUMPU). A possible earlier precursor is ᴱN. tuf “lump, knob” from Early Noldorin Word-lists of the 1920s (PE13/154).
Quenya
tumpo
hump
tumpo
noun. shed, barn
tumpo (stem *tumpu-, given the primitive form ¤tumpu) noun "hump" (TUMPU)