1
fall silent(verb, expression, calm, dull, quiet)
1
fix up(verb, expression, phrasal verb, calm, subdue)
1
freeze
1
gratify(verb, calm, subdue, relax, satisfy)
1
halt
1
hide(verb, keep, suppress, refuse, deny)
1
hold(verb, keep, suppress, refuse, deny)
1
hold back(verb, expression, phrasal verb, stop, keep)
1
hold down(verb, expression, phrasal verb, quiet, keep)
1
hold out(verb, expression, phrasal verb, keep, suppress)
1
hold out on(verb, expression, idiom, phrasal verb, keep)
1
ice(verb, calm, subdue, relax, satisfy)
1
inactivate(verb, calm, quiet, subdue, relax)
1
inhibit(verb, keep, suppress, refuse, deny)
1
keep(verb, suppress, refuse, deny, reserve)
1
keep back(verb, expression, phrasal verb, close, keep)
1
keep mum
1
keep secret(verb, expression, close, keep, suppress)
1
keep to oneself(verb, expression, idiom, keep, suppress)
1
keep under wraps(verb, expression, idiom, keep, suppress)
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APASmart Define. (2015). clam up thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/clam_up/thesaurus/synonyms
ChicagoSmart Define. 2015. "clam up thesaurus" https://smartdefine.org/clam_up/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, clam up thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/clam_up/thesaurus/synonyms>.
MLASmart Define. "clam up thesaurus" 10 April 2015. Web. 22 September 2026. <https://smartdefine.org/clam_up/thesaurus/synonyms>