Lackadaisical

Lackadaisical is an adjective used to describe a person or action that shows little enthusiasm, energy, or determination. It implies a halfhearted or lazy attitude, often with lethargy, slowness, or carelessness toward tasks or obligations.

The term dates to English in the 18th century. It is linked to the playful coinage lackadaisy, which scholars generally trace to the exclamation lackaday ("alas") and a daisy-like reduplication. Over time, lackadaisy evolved into lackadaisical to describe a languid, indolent disposition or manner. Spelling has varied in historical sources; the form lackadaisical has become standard.

It is most commonly used in informal or literary contexts. A lackadaisical attitude can be applied to work, study, or decisions, as in a lackadaisical effort or a lackadaisical response. The term can carry a pejorative tone, but may also be used humorously.

Related terms include languid, listless, lethargic, perfunctory, and nonchalant; antonyms include energetic, diligent, meticulous, and spirited. Lackadaisical often implies a habitual or intentional indifference rather than a momentary lapse.