| 词汇 | lackadaisical |
| 词根词缀 | 词源： 1768, from interjection lackadaisy "alas, alack" (1748), an alteration of lack-a-day (1690s), from alack the day. Hence, "given to crying 'lack-a-day,' vapidly sentimental." Sense probably altered by influence of lax. Related: Lackadaisically. |
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