Adjective
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idle or indolent especially in a dreamy way
"she was annoyingly lackadaisical and impractical"
"a...lackadaisical, spiritless young man-about-town"- P.G.Wodehouse
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lacking spirit or liveliness
"a lackadaisical attempt"
"a languid mood"
"a languid wave of the hand"
"a hot languorous afternoon"