"languid and unresponsive, slothful," mid-15c., from Middle English liste "pleasure, joy, delight" (see list (v.4)) + -less. Spenser, if no one else, tried listful (1590s). Related: Listlessly; listlessness.
he was listless and bored
reacted to the crisis with listless resignation
listen
listenable
listener
Listerine
listing
listless
lit
litany
lite
-lite
liter