Lacking energy or enthusiasm; seeming bored or tired and unable to pay attention.
From the noun 'list,' which comes from Old English 'lust' meaning desire or inclination. Adding the suffix '-less' (meaning without) creates the adjective 'listless'—literally 'without desire.'
Listless comes from an old English word 'lust' meaning 'desire'—so when you're listless, you're literally 'without lust' or desire! The word perfectly captures that zombified feeling where nothing seems interesting, even things you'd normally enjoy.
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