- without interest, vigor, or determination; listless; lethargic: a lackadaisical attempt.
- lazy; indolent: a lackadaisical fellow.
Origin of lackadaisical
SynonymsSee more synonyms on Thesaurus.com
Examples from the Web for lackadaisically
But everything had not gone well, and he found it very difficult to carry himself otherwise than lackadaisically.The Small House at Allington
- lacking vitality and purpose
- lazy or idle, esp in a dreamy way
Word Origin and History for lackadaisically
1768 (Sterne), from interjection lackadaisy "alas, alack" (1748), an alteration of lack-a-day (1690s), from alack the day (1590s). Hence, "given to crying 'lack-a-day,' vapidly sentimental." Sense probably altered by influence of lax. Related: Lackadaisically.