Antonyms of adj lackadaisical

2 senses of lackadaisical

Sense 1
dreamy, lackadaisical, languid, languorous -- (lacking spirit or liveliness; "a lackadaisical attempt"; "a languid mood"; "a languid wave of the hand"; "a hot languorous afternoon")

INDIRECT (VIA lethargic) -> energetic -- (possessing or exerting or displaying energy; "an energetic fund raiser for the college"; "an energetic group of hikers"; "it caused an energetic chemical reaction")

Sense 2
lackadaisical -- (idle or indolent especially in a dreamy way; "she was annoyingly lackadaisical and impractical"; "a...lackadaisical, spiritless young man-about-town"- P.G.Wodehouse)

INDIRECT (VIA idle) -> busy -- (actively or fully engaged or occupied; "busy with her work"; "a busy man"; "too busy to eat lunch")

Similarity of adj lackadaisical

2 senses of lackadaisical

Sense 1
dreamy, lackadaisical, languid, languorous -- (lacking spirit or liveliness; "a lackadaisical attempt"; "a languid mood"; "a languid wave of the hand"; "a hot languorous afternoon")
       => lethargic (vs. energetic), unenrgetic -- (deficient in alertness or activity; "bullfrogs became lethargic with the first cold nights")

Sense 2
lackadaisical -- (idle or indolent especially in a dreamy way; "she was annoyingly lackadaisical and impractical"; "a...lackadaisical, spiritless young man-about-town"- P.G.Wodehouse)
       => idle (vs. busy) -- (not in action or at work; "an idle laborer"; "idle drifters"; "the idle rich"; "an idle mind")