- Definitions|1
- Thesaurus|926
- Abbreviations|0
| unflappable(adjective, calm, unemotional, composed) | |
| ungenial | |
| unimpressionable(adjective, detached, impassive, unresponsive, laid-back) | |
| unquestionable | |
| unselfish(adjective, modest) | |
| unsocial | |
| unwelcoming(adjective, cool, indifferent, restrained, remote) | |
| uptight(calm, quiet, reasonable, mild, controlled) | |
| veridical | |
| with straight face(expression, adjective, idiom, cool, detached) | |
| abstentious | |
| affectless | |
| blankly | |
| cautious(quiet, gentle, aloof, peaceful, reserved) | |
| cavalier | |
| ceremonious(quiet, gentle, aloof, reserved, reticent) | |
| chilling | |
| clinical | |
| close(quiet, gentle, aloof, peaceful, reserved) | |
| coldblooded(cool, aloof, distant) |
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| APA | Smart Define. (2015). undemonstrative thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/undemonstrative/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "undemonstrative thesaurus" https://smartdefine.org/undemonstrative/thesaurus/synonyms (accessed September 22, 2026). |
| Harvard | Smart Define 2015, undemonstrative thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/undemonstrative/thesaurus/synonyms>. |
| MLA | Smart Define. "undemonstrative thesaurus" 14 April 2015. Web. 22 September 2026. <https://smartdefine.org/undemonstrative/thesaurus/synonyms> |