the.com/rondo

means A musical structure where a main theme keeps returning again and again between contrasting episodes, like a chorus you can't stay away from.

from From French rondeau/rondel, itself rooted in rond, 'round' — the same family that gives us 'round' and 'rotund.' The word traces back to Latin rotundus. It named circular dances and poems where the refrain loops back around, and by the 18th century composers borrowed the term for musical movements built the same way: theme, detour, theme again, detour, theme again.