say it: lak-uh-DAY-zi-kuhl
lackadaisical is an adjective meaning "lacking spirit or liveliness". It carries 2 recorded senses.
lacking spirit or liveliness
“a lackadaisical attempt”
“a languid mood”
“a languid wave of the hand”
“a hot languorous afternoon”
idle or indolent especially in a dreamy way
“she was annoyingly lackadaisical and impractical”
“a...lackadaisical, spiritless young man-about-town”
Definitions, synonyms and semantic relations for lackadaisical come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.