4
inexpressive
4
mum
3
blank
3
close
3
closelipped
3
closemouthed
3
impassive
3
incommunicado
3
poker-faced
3
secretive
3
silent
3
tightlipped
3
unexpressive
3
unpronounceable
3
vacuous
2
deadpan
2
expressionless
2
overprotective
2
shy
2
unutterable
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APASmart Define. (2016). incommunicative thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/incommunicative/thesaurus/related
ChicagoSmart Define. 2016. "incommunicative thesaurus" https://smartdefine.org/incommunicative/thesaurus/related (accessed September 24, 2026).
HarvardSmart Define 2016, incommunicative thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/incommunicative/thesaurus/related>.
MLASmart Define. "incommunicative thesaurus" 26 February 2016. Web. 24 September 2026. <https://smartdefine.org/incommunicative/thesaurus/related>