0
immobile(adjective, tranquil, silent, motionless, unmoving)
0
imperceivable(unknowing, hermetical, unbriefed)
0
in a corner(expression, idiom, unknowing, hermetical, unbriefed)
0
in secret(expression, unknowing, hermetical, unbriefed)
0
inactivate
0
incommunicable(adjective, taciturn)
0
incommunicative(adjective, taciturn)
0
introverted(reserved, reticent, uncommunicative)
0
keep down(expression, close, gag, quieten, shush)
0
keep it down(expression, idiom, quieten, shush, dulling)
0
keep silent
0
keeping a stiff upper lip(expression, idiom, silenced, whist, disimpassioned)
0
make silent(expression, quiet, inactivate)
0
muzzled(silenced, whist, disimpassioned)
0
mysterious(private, reticent)
0
nescient(unknowing, hermetical, unbriefed)
0
noncommittal(adjective, decide)
0
not informed(expression, unknowing, hermetical, unbriefed)
0
not knowing(expression, unknowing, hermetical, unbriefed)
0
not talkativ(expression, adjective, close, quiet, soft)
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APASmart Define. (2013). clammed up thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/clammed_up/thesaurus/synonyms
ChicagoSmart Define. 2013. "clammed up thesaurus" https://smartdefine.org/clammed_up/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2013, clammed up thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/clammed_up/thesaurus/synonyms>.
MLASmart Define. "clammed up thesaurus" 18 May 2013. Web. 22 September 2026. <https://smartdefine.org/clammed_up/thesaurus/synonyms>