DictionaryAI

lackadaisical

adjective
lak-uh-DAY-zi-kuhl/ˌlækəˈdeɪzɪkəl/

1 meaning of lackadaisical

Practice

  1. 1
    adjective
    Lacking enthusiasm, energy or determination; carelessly lazy.

    The crowd gave the band a lackadaisical round of applause and drifted toward the exits.

    Critics blamed the agency's lackadaisical response for letting the outbreak spread.

    Similarhalfhearted, lazy, careless, lax, apathetic

    Oppositeenthusiastic, energetic, diligent, vigorous

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Origin

From lackadaisy, an altered form of lackaday, an old sigh of regret shortened from alack the day, with the endings -ic and -al.

Checked 1 Nov 2026 · 4 facts