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lack·a·dai·si·cal [lak-uh-dey-zi-kuh l]
adjective

1. lacking interest, motivation, or vigor; apathetic:

The team was lackadaisical.

2. lazy; indolent; unwilling to work:

He was a lackadaisical employee.

Origin

1760-70; lackadais(y) (variant of lackaday ) + -ical

Synonyms

2. sluggardly, unambitious, idle.