spright·ly /-li/
  (a.)活潑的,愉快的(ad.)活潑地,愉快地
  Spright·ly a. [Compar. Sprightlier superl. Sprightliest.]  Sprightlike, or spiritlike; lively; brisk; animated; vigorous; airy; gay; as, a sprightly youth; a sprightly air; a sprightly dance. “Sprightly wit and love inspires.”
     The sprightly Sylvia trips along the green.   --Pope.
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  sprightly
       adj : full of spirit and vitality; "a sprightly young girl"; "a
             sprightly dance"
       [also: sprightliest, sprightlier]