Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.

WORD ORIGIN

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.

MORE RELATED WORDS FOR LACKADAISICALNESS

Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.