| abject | |
| abstracted(adjective, dull, careless, relaxed, indifferent) | |
| accustomed(adjective, dull, quiet, flat, slow) | |
| apathetical(adjective, cold, dead, apathy, passive) | |
| apoplectic(calm, still, lifeless, inactive, stationary) | |
| arctic | |
| argon | |
| asleep on the job(expression, idiom, dull, idle, sluggish) | |
| at a standstill(expression, adjective, idiom, calm, still) | |
| balky | |
| bearing(adjective, quiet, indifferent, apathetic, lifeless) | |
| blahs(adjective, dull, weak, easy, slow) | |
| blank(adjective, dull, quiet, weak, flat) | |
| bodiless | |
| buttoned up(expression, adjective, calm, quiet, smooth) | |
| bystanding(adjective, indifferent, detached, aloof, unconcerned) | |
| callous(adjective, dull, quiet, flat, heavy) | |
| careless(dull, indifferent, idle, apathetic, sluggish) | |
| casehardened | |
| chloroformed |
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| APA | Smart Define. (2015). inert thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/inert/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "inert thesaurus" https://smartdefine.org/inert/thesaurus/synonyms (accessed September 24, 2026). |
| Harvard | Smart Define 2015, inert thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/inert/thesaurus/synonyms>. |
| MLA | Smart Define. "inert thesaurus" 10 April 2015. Web. 24 September 2026. <https://smartdefine.org/inert/thesaurus/synonyms> |