Etymologically

lackadaisical

Etymology and origin of the English word lackadaisical

Pronunciation

  • IPA: /ˌlækəˈdeɪzɪkəl/, /læksə-/[1]

Etymology

Formed from lackadaisy,[2][3][4] a playful alteration of the exclamation lackaday,[2][3][5] which comes from alack the day.[3]

Earliest recorded meaning

It first meant affectedly languishing or full of vapid sentiment, like someone given to crying “Lackaday!”;[6][3] Sterne used it in 1768.[3]

Semantic evolution

Its sense moved from sentimental languor to lack of energy or interest.[2][4] Etymonline suggests the change was probably influenced by lax.[3]

Timeline

  • 1690s – lack-a-day.[3]
  • 1748 – lackadaisy.[3]
  • 1768 – lackadaisical.[3][6][5]

Modern meaning

Adjective

  1. Lacking spirit, energy or interest; listless.
  2. Lazy, idle.

Word family

  • lackadaisically
  • lackadaisicalness

Related words

  • lackaday
  • lax
  • alack

References

  1. [1] Wiktionary, the free dictionary, https://en.wiktionary.org
  2. [1] [2] [3] The American Heritage Dictionary of the English Language (1992), 3rd ed., Boston: Houghton Mifflin
  3. [1] [2] [3] [4] [5] [6] [7] [8] [9] Harper, Douglas, Online Etymology Dictionary, https://www.etymonline.com
  4. [1] [2] Random House Webster's Unabridged Dictionary (1999), 2nd ed., New York: Random House
  5. [1] [2] Merriam-Webster's Collegiate Dictionary (2003), 11th ed., Springfield, Mass.: Merriam-Webster
  6. [1] [2] Simpson, J. A.; Weiner, E. S. C., eds. (1989), The Oxford English Dictionary, 2nd ed., Oxford: Clarendon Press
Cite this entry

“Lackadaisical.” Etymologically, 6 Oct. 2026, etymologically.com/en/lackadaisical. Accessed 7 Oct. 2026.

Last edited on .