1
empty(adjective, dull, dead, impassive, unresponsive)
1
equable(adjective, quiet, cool, moderate, gentle)
1
even-tempered(adjective, unexcitable)
1
extreme
1
furtive
1
hardened(adjective, cool, blank, aloof, unemotional)
1
heartless(adjective, cool, blank, aloof, unemotional)
1
inarticulate
1
incoherent
1
inconceivable
1
indurated(adjective, cool, blank, aloof, unemotional)
1
inexcitable(adjective, cool, blank, aloof, unemotional)
1
inexpressive(adjective, dull, cool, dead, blank)
1
insensible(adjective, cool, blank, aloof, unemotional)
1
insolvable
1
insusceptible(adjective, cool, blank, aloof, unemotional)
1
laid-back(adjective, quiet, cool, moderate, gentle)
1
level-headed(adjective, unexcitable)
1
levelheaded(adjective, quiet, cool, moderate, gentle)
1
listless(adjective, quiet, cool, moderate, gentle)
11 years ago|9.5k views|share |citing 
APASmart Define. (2015). inscrutable thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/inscrutable/thesaurus/synonyms
ChicagoSmart Define. 2015. "inscrutable thesaurus" https://smartdefine.org/inscrutable/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, inscrutable thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/inscrutable/thesaurus/synonyms>.
MLASmart Define. "inscrutable thesaurus" 10 April 2015. Web. 22 September 2026. <https://smartdefine.org/inscrutable/thesaurus/synonyms>