ruithil

a reel, dance, also righil, ruidhil: *retoli-, root ret, run, wheel, as in ruith; Latin rotula, little wheel, rotulare, revolve, English roll. Hence English reel (Skeat). The borrowing may be, however,, the other way, and English reel, dance, be the same as reel, a spindle or bobbin. *roteli?