Lackadaisical vs Lacklustre - What's the difference?

As adjectives the difference between lackadaisical and lacklustre

is that lackadaisical is showing no interest or enthusiasm while lacklustre is british an alternative spelling of lang=en.

(en adjective)

Showing no interest or enthusiasm.

* 2010 ,

I could hear the sound of the janitor's lackadaisical scrubbing against the wooden floor.

the lackadaisical look on his face

* (showing no interest or enthusiasm) languid, listless, unenthusiastic, uninterested * See also

* lackadaisically * lackadaisicalness

(en adjective)

(British)