A word in the Early Noldorin Dictionary of the 1920s, appearing as {dadnún >>} dadnuin, variously glossed “sinking down” (PE13/161) or “sinking” with the caveat that it was “now only used of going downhill, down stairs, etc.” (PE13/164). It may be a verbal noun of ᴱN. dadnuv- “*sink down”, or it could be a combination of ᴱN. dad “down” and ᴱN. dad “down” and ᴱN. nuin “sinking”, the latter apparently a verbal noun of ᴱN. nuv- “sink, set” (PE13/151, 164).