CEFR C1
lackadaisical
adjective
Meaning
lackadaisical means showing no interest, vigor, determination, or enthusiasm. It can have more than one sense, so use the alternate meanings and examples to choose the meaning that matches your sentence.
Examples
- the lackadaisical look on his face
- The writer described the response as lackadaisical.
Synonyms: languid, lethargic, listless, unenthusiastic, uninterested