lackadaisical

adj. 无精打采的，无兴趣的

Labour Day (US Labor Day), Labour Exchange, labour-intensive, labour-saving, laboured (US labored), labourer, labourer (US laborer), Labrador, laburnum, labyrinth, labyrinthine, lace, lace-ups, lacerate, laceration, lachrymal, lachrymose, lack, lack in, lack-lustre, lackadaisically, lackey, lacking, lackluster, laconic, laconically, laconism, lacquer, lacrimose, lacrosse, lactate, lactation, lactic, lactic acid, lactose, lacuna, lacy, lad, ladder, laddie,