spright·ful /ˈspraɪtfəl/
  Spright·ful a.  Full of spirit or of life; spirited; earnest; vivacious; lively; brisk; nimble; gay. [Obs.] -- Spright*ful*ly, adv. [Obs.]
  -- Spright*ful*ness, n. [Obs.]
     Spoke like a sprightful noble gentleman.   --Shak.
     Steeds sprightful as the light.   --Cowley.
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