lackadaisical
adjective formal uk/ˌlæk.əˈdeɪ.zɪ.kəl/ us/ˌlæk.əˈdeɪ.zɪ.kəl/
无精打采的，萎靡不振的，不热心的
showing little enthusiasm and effort
The food was nice enough but the service was somewhat lackadaisical. 这里的饭菜不错但服务不够热情。
Synonym: half-hearted