0
subdued(quiet, soft, low)
0
tasteful(quiet, soft, low)
0
thunderstruck(silent, dazed, dumb, astonished, flabbergasted)
0
tongue-tied(silent, dazed, dumb, astonished, thunderstruck)
0
unapproachable(quiet, gentle, aloof, reserved, reticent)
0
uncompanionable(quiet, gentle, aloof, peaceful, reserved)
0
under cover(expression, taciturn, uncommunicative)
0
underground
0
unflappable(astonished, thunderstruck, flabbergasted)
0
unfriendly(aloof, reticent, standoffish)
0
unmoving(adjective, tranquil, silent, motionless, immobile)
0
unobtrusive(adjective, close, quiet, soft, low)
0
unsociable(reserved, reticent, taciturn)
0
unsociable constrained(expression, quiet, aloof, peaceful, reticent)
0
unsocial
0
uptight(quiet, restrained, discreet)
0
voiceless(silent, dazed, dumb, astonished, thunderstruck)
0
wordless(silent, dazed, dumb, astonished, thunderstruck)
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APASmart Define. (2015). close-mouthed thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/close-mouthed/thesaurus/synonyms
ChicagoSmart Define. 2015. "close-mouthed thesaurus" https://smartdefine.org/close-mouthed/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2015, close-mouthed thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/close-mouthed/thesaurus/synonyms>.
MLASmart Define. "close-mouthed thesaurus" 10 April 2015. Web. 28 September 2026. <https://smartdefine.org/close-mouthed/thesaurus/synonyms>