13
dull(adjective, smart, active, fast, boring)
10
very upset
9
boring
7
sad(adjective, dull, happy, joy, glad)
7
dead in the water
7
gray
7
inactive(adjective, dull, moving, lethargic)
6
blue(adjective, feeling, happiness)
6
lethargic(adjective, dull, energetic, sluggish, lazy)
6
listless(adjective, energy, energetic, spiritless)
5
lifeless(adjective, dull, full, lethargic, spiritless)
5
cowardly
5
inert(adjective, moving, lifeless)
5
lackluster(noun, adjective, dull, lifeless)
5
limp
5
monotonous(adjective, same)
5
sleepy(adjective, dull, alert, lethargic)
4
arid(adjective, uninterested, productive, spiritless)
4
heavy(adjective, dull, lethargic)
3
idle
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APASmart Define. (2015). lively thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/lively/thesaurus/antonyms
ChicagoSmart Define. 2015. "lively thesaurus" https://smartdefine.org/lively/thesaurus/antonyms (accessed September 22, 2026).
HarvardSmart Define 2015, lively thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/lively/thesaurus/antonyms>.
MLASmart Define. "lively thesaurus" 19 December 2015. Web. 22 September 2026. <https://smartdefine.org/lively/thesaurus/antonyms>