Qenya
pano
noun. piece of shaped wood, piece of shaped wood, *board, plank
Beware, older languages below! The languages below were invented during Tolkien's earlier period and should be used with caution. Remember to never, ever mix words from different languages!
A noun from The Etymologies of the 1930s glossed “piece of shaped wood” derived from ᴹ✶panō under the root ᴹ√PAN “place, set, fix in place (especially of wood)” (Ety/PAN).
Neo-Quenya: For purposes of Neo-Quenya, I would also use this word for “✱board, plank”, based on the meaning of its Noldorin cognate N. pân.
Conceptual Development: The Qenya Lexicon of the 1910s had ᴱQ. sarat (sarakt-) “plank” under the early root ᴱ√SARA [ÞARA] (QL/82), whereas ᴱQ. pano was “series, course, plan, arrangement” under the early root ᴱ√PANA “arrange” (QL/72). The English-Qenya Dictionary of the 1920s had ᴱQ. panta “board” (PE15/70), which seems to be a precursor to pano “piece of shaped wood” from the 1930s (Ety/PAN; see above). The root √PAN still meant “arrange” in Tolkien’s later writings (PE17/108), but whether it was connected to “boards” is unclear.