75 entries under indifferent topic. ×

4
snoozy(adjective, dull, quiet, weak, easy)
4
stoic(adjective, calm, unconcerned, unemotional)
4
unemotional(adjective, calm, dull, flat)
4
unresponsive(adjective, calm, dull, flat, slow)
3
incurious(adjective, careless, relaxed, feelings)
3
limp(adjective, dull, weak, easy, slow)
2
bored(adjective, dull, unconcerned, sluggish)
2
careless(adjective, dull, idle, apathetic)
2
cold(adjective, calm, dull, flat)
2
disinterested(adjective, calm, dull, flat, careless)
2
draggy(adjective, dull, quiet, slow, heavy)
2
faineant(adjective, dull, careless, apathetic)
2
inattentive(adjective, dull, careless, idle)
2
slow-moving(adjective, dull, quiet, easy, slow)
2
wimpy(adjective, dull, weak, easy, slow)
1
abstracted(adjective, dull, careless, relaxed)
1
callous(adjective, unfeeling, unconcerned, numb)
1
cool(adjective, calm, dull, flat)
1
energyless(adjective, dull, weak, easy, slow)
1
flat(adjective, calm, dull, unconcerned)
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APASmart Define. (2016). lethargic thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/lethargic/thesaurus/synonyms
ChicagoSmart Define. 2016. "lethargic thesaurus" https://smartdefine.org/lethargic/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2016, lethargic thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/lethargic/thesaurus/synonyms>.
MLASmart Define. "lethargic thesaurus" 4 January 2016. Web. 28 September 2026. <https://smartdefine.org/lethargic/thesaurus/synonyms>