lackadaisical
[ lak-uh-dey-zi-kuhl ]
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Part of Speechadjective
Origin + Etymology
from lackaday or its obsolete extended form lackadaisy
Synonyms
  • slothful
  • unambitious
  • idle
  • careless
  • lazy
  • lax
  • unenthusiastic
  • halfhearted
  • uninterested
Antonyms
  • active
  • interested
  • careful
  • energetic
  • lively
Definition
without interest, vigor, or determination; listless; lethargic
Example
His lack of preparation for that presentation really exposed his lackadaisical work ethic.
Usage Over Time
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