roun·de·lay /ˈraʊndəˌle/
  反復的小調,圓舞之一種,小鳥的鳴囀
  Round·e·lay n.
  1. Poetry See Rondeau, and Rondel.
  2. Mus. (a) A tune in which a simple strain is often repeated; a simple rural strain which is short and lively. --Spenser.  --Tennyson. (b) A dance in a circle.
  3. Anything having a round form; a roundel.
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  roundelay
       n : a song in which a line or phrase is repeated as the refrain