40 entries under gentle topic. ×

11
aloof(adjective, close, quiet, cool)
8
withdrawn(adjective, calm, quiet, cool, reasonable)
7
offish(adjective, close, quiet, cool)
7
restrained(adjective, calm, close, quiet)
7
standoffish(adjective, close, quiet, cool)
6
retiring(adjective, calm, close, quiet, reasonable)
6
unapproachable(adjective, quiet, cool, attitude)
6
uncommunicative(adjective, close, quiet, cool)
5
bashful(adjective, quiet, modest, aloof)
5
inhibited(adjective, close, quiet, cool)
5
modest(adjective, quiet, modest, aloof)
4
demure(adjective, quiet, modest, aloof)
4
placid(adjective, calm, quiet, aloof)
3
diffident(adjective, quiet, modest, aloof)
3
serene(quiet, aloof, peaceful, reserved)
3
shy(adjective, close, quiet, mild)
3
solitary(adjective, close, quiet, cool)
2
backward(quiet, aloof, peaceful, reserved)
2
close-mouthed(adjective, quiet, aloof, peaceful)
2
controlled(adjective, calm, quiet, reasonable)
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APASmart Define. (2015). undemonstrative thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/undemonstrative/thesaurus/synonyms
ChicagoSmart Define. 2015. "undemonstrative thesaurus" https://smartdefine.org/undemonstrative/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2015, undemonstrative thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/undemonstrative/thesaurus/synonyms>.
MLASmart Define. "undemonstrative thesaurus" 14 April 2015. Web. 24 September 2026. <https://smartdefine.org/undemonstrative/thesaurus/synonyms>