lackadaisical

[ lak-uh-dey-zi-kuhl ]

Part of Speech

adjective

Definition

without interest, vigor, or determination; listless; lethargic

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

Example

His lack of preparation for that presentation really exposed his lackadaisical work ethic.

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