2
even(adjective, dull, quiet, flat, slow)
2
extinct(lifeless, late, asleep, nonliving, inorganic)
2
extinguished
2
half-hearted(adjective, cold, dead, apathy, passive)
2
halfhearted(adjective, dull, careless, cold, indifferent)
2
immaterial
2
immotile(calm, still, lifeless, inactive, motionless)
2
in abeyance(expression, calm, gentle, still, hidden)
2
inoperative(adjective, action, calm, gentle, sluggish)
2
insensitive(adjective, dull, quiet, flat, heavy)
2
invariable
2
laid-back(adjective, dull, quiet, weak, easy)
2
limp(adjective, dull, weak, easy, slow)
2
logy(adjective, slow, sluggish, slow-moving, snail-paced)
2
lukewarm(adjective, dull, flat, cold, sluggish)
2
lymphatic(adjective, weak, heavy, still, sluggish)
2
moony(adjective, dull, quiet, weak, easy)
2
mute
2
neuter(detached, unconcerned, removed)
2
not moving(expression, calm, still, lifeless, inactive)
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APASmart Define. (2015). inert thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/inert/thesaurus/synonyms
ChicagoSmart Define. 2015. "inert thesaurus" https://smartdefine.org/inert/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2015, inert thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/inert/thesaurus/synonyms>.
MLASmart Define. "inert thesaurus" 10 April 2015. Web. 23 September 2026. <https://smartdefine.org/inert/thesaurus/synonyms>