A more elaborate word for “circle” in The Etymologies of the 1930s, appearing as N. rhingorn as a combination of N. rhinn “circle” and N. corn “round” (Ety/KOR; RIN).

Neo-Sindarin: Many Neo-Sindarin writers adapt this word as ᴺS. ringorn “circle” for purposes of Neo-Sindarin as suggested in Hiswelókë’s Sindarin Dictionary (HSD), since the unvoicing of initial r to rh was a feature of Noldorin of the 1930s but not Sindarin of the 1950s and 60s.