lackadaisical
Word family adverblackadaisicallynounlackadaisicalnessadjectivelackadaisicalinterjectionlackadaisy
lack·a·dai·si·cal /ˌlækəˈdeɪzɪkəl◂/ adjectiveadj INTERESTEDnot showing enough interest in something or not putting enough effort into it 无精打采的;懒散的 David has a rather lackadaisical approach to his work. 戴维的工作态度有点懒散。
Origin lackadaisical (1700-1800) lackaday expression of sadness ((17-19 centuries)), from alack the day