Definition of lackadaisical in English:

lackadaisical

Syllabification: lack·a·dai·si·cal
Pronunciation: /ˌlakəˈdāzikəl
 
/

adjective

Lacking enthusiasm and determination; carelessly lazy: a lackadaisical defense left the Spurs adrift in the second half
More example sentences
  • The President is remarkably lackadaisical about finding the senior administration official who leaked the identity of a CIA operative.
  • I want to be organized, but I'm just too lackadaisical to get things in order.
  • He still is too inconsistent and too lackadaisical.
Synonyms
lethargic, apathetic, listless, sluggish, spiritless, passionless; careless, lazy, lax, unenthusiastic, halfhearted, lukewarm, indifferent, unconcerned, casual, offhand, blasé, insouciant, relaxed
informal laid-back, easygoing, couldn't-care-less

Origin

mid 18th century (also in the sense 'feebly sentimental'): from the archaic interjection lackaday, lackadaisy (see alack) + -ical.

Derivatives

lackadaisically

adverb
More example sentences
  • They perpetuate the lies and the fairytales that they have been told since childhood lackadaisically.
  • During my visit to the Beijing New Art Projects the Gao brothers walked out from behind their glass office and lackadaisically circulated among the visitors.
  • If during the year a team plays lackadaisically because of the leadership of the coach, this factor will be intensified.

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Pronunciation: ɪˈrəʊnɪəs
adjective
wrong; incorrect