Lacking energy or disinclined to exert effort; lethargic: reacted to the latest crisis with listless resignation. (adjective)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "listless" in a sentence
"After some days spent in listless indolence, during which I traversed many leagues,"
"But he grew up, I think, with -- I don't want to use the word listless; I'm very careful -- with a sense of following in the family footsteps to some extent, but not in the political vein."
"Since I arrived not a leaf has stirred, not a bird has sung, the tides ebb and flow in listless and soundless ripples."