1
suffocate(verb, stop, restrain, curb, suppress)
1
take the bite out of(verb, expression, idiom, phrasal verb, calm)
1
torpedo(verb, stop, close, restrain, curb)
1
trammel(verb, stop, restrain, curb, suppress)
1
tranquilize(verb, calm, subdue, relax, satisfy)
1
withhold(verb, keep, suppress, refuse, deny)
0
Button your lip
0
Hold your tongue
0
Mum's the word
0
Shut your face
0
Shut your gob
0
Shut your trap
0
administer
0
advocate
0
be calm(quiet, inactivate)
0
be silent
0
be unforthcoming(verb, choke)
0
be unwilling to talk(verb, choke)
0
block
0
boss
11 years ago|1.2k views|share |citing 
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>