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lackadaisical

lack·a·dai·si·cal

lackadaisical

 
 
pronunciation:
lae k deI zih kl
part of speech: adjective
definition: lacking energy, determination, or enthusiasm; listless or lazy.
Hot and humid weather tends to make me lackadaisical; I'd rather take a nap than do anything productive.
synonyms:
languid, lazy, lethargic, listless, spiritless
antonyms:
enthusiastic, laborious
similar words:
apathetic, dull, idle, indolent, phlegmatic, shiftless, slothful, sluggish, torpid
derivation: lackadaisically (adv.)