92 entries under impassive topic. ×

1
unembellished(adjective, tough, rational, straightforward, sober)
1
unidealistic(adjective, tough, rational, straightforward, sober)
1
unimaginative(adjective, tough, rational, straightforward, sober)
1
unimpassioned(adjective, cool, tough, rational, straightforward)
1
unimpressionable(adjective, detached, unresponsive, laid-back)
1
unsentimental(adjective, tough, rational, straightforward, sober)
1
unvarnished(adjective, tough, rational, straightforward, sober)
0
cynical(adjective, tough, unfeeling, unemotional)
0
dumb(dull, slow, stupid, unresponsive)
0
mundane(adjective, tough, rational, straightforward, sober)
0
realistic(adjective, tough, rational, straightforward, sober)
0
slow-witted(dull, slow, stupid, unresponsive)
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APASmart Define. (2015). phlegmatic thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/phlegmatic/thesaurus/synonyms
ChicagoSmart Define. 2015. "phlegmatic thesaurus" https://smartdefine.org/phlegmatic/thesaurus/synonyms (accessed September 29, 2026).
HarvardSmart Define 2015, phlegmatic thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/phlegmatic/thesaurus/synonyms>.
MLASmart Define. "phlegmatic thesaurus" 10 April 2015. Web. 29 September 2026. <https://smartdefine.org/phlegmatic/thesaurus/synonyms>