19 entries under heavy topic. ×

5
passionless(adjective, dull, quiet, flat)
4
dull(adjective, quiet, flat, dead)
3
spiritless(adjective, dull, quiet, flat)
0
accustomed(adjective, dull, quiet, flat)
0
blank(adjective, dull, quiet, flat)
0
depressed(adjective, dull, quiet, flat)
0
empty(adjective, dull, quiet, flat)
0
even(adjective, dull, quiet, flat)
0
inactive(adjective, dull, quiet, flat)
0
inert(adjective, dull, quiet, flat)
0
languid(adjective, dull, quiet, flat)
0
lumpy(adjective, dull, quiet, flat)
0
placid(adjective, dull, quiet, flat)
0
quiet(adjective, dull, flat, dead)
0
regular(adjective, dull, quiet, flat)
0
slack(adjective, dull, quiet, flat)
0
stagnant(adjective, dull, quiet, flat)
0
still(adjective, dull, quiet, flat)
0
torpid(adjective, dull, quiet, flat)
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APASmart Define. (2015). impassible thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/impassible/thesaurus/synonyms
ChicagoSmart Define. 2015. "impassible thesaurus" https://smartdefine.org/impassible/thesaurus/synonyms (accessed September 27, 2026).
HarvardSmart Define 2015, impassible thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/impassible/thesaurus/synonyms>.
MLASmart Define. "impassible thesaurus" 14 April 2015. Web. 27 September 2026. <https://smartdefine.org/impassible/thesaurus/synonyms>