Adjective listless has 2 senses
  1. listless - lacking zest or vivacity; "he was listless and bored"
    Antonym:
    energetic (indirect, via lethargic)
  2. dispirited, listless - marked by low spirits; showing no enthusiasm; "a dispirited and divided Party"; "reacted to the crisis with listless resignation"
    Antonym: spirited (indirect, via spiritless)
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