not showing enough care or enthusiasm 无精打采的;委靡不振的;懒洋洋的;不热心的 He has a lackadaisical approach to finding a job. 他找工作的方法很懒散。
Word Originmid 18th cent. (also in the sense ‘feebly sentimental’): from lackaday (or its obsolete extended form lackadaisy).
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