list ‧ less /ˈlɪstləs/ BrE AmE adjective
[ Date: 1400-1500 ; Origin: list 'pleasure, desire' (13-19 centuries) (from Old English lystan 'to please, wish' ) + -less ]
feeling tired and not interested in things:
The heat was making me listless.
—listlessly adverb
—listlessness noun [uncountable]