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clammed up

ADJECTIVE

closemouthed

Synonyms

WEAK

buttoned-up close close-lipped dummied up have tight chops hush-hush quiet reticent sedate taciturn tight-lipped uncommunicative zipped one's lips

Antonyms

WEAK

chatty open talkative

ADJECTIVE

hushed

Synonyms

STRONGEST

muted

STRONG

checked close curbed faint hush iced inhibited mute

WEAK

bashful buttoned-up closed-up closemouthed dumb dummied up inarticulate incoherent inconversable indistinct laconic mousy mum noiseless nonvocal not talkativ

Antonyms

STRONG

bold

ADJECTIVE

incommunicable

Synonyms

WEAK

aloof antisocial brooding close close-mouthed cold curt distant dour dried-up dumb incommunicative laconic mum mute quiet reserved reticent sententious silent sparing speechless tight-lipped tightlipped uncommunicable uncommunicative unexpressive unforthcoming withdrawn

ADJECTIVE

incommunicative

Synonyms

STRONG

uncommunicative

WEAK

aloof antisocial brooding close close-mouthed cold curt distant dour dried-up dumb incommunicable laconic mum mute quiet reserved reticent sententious silent sparing speechless tight-lipped tightlipped uncommunicable unexpressive unforthcoming withdrawn

ADJECTIVE

inobtrusive

Synonyms

WEAK

buttoned-up close close-mouthed could hear a pin drop dumb hushed hushful inaudible low low-pitched muffled mute muted noiseless not saying boo peaceful quiescent quieted reserved restrained reticent secretive silent soft soundless speechless still stilled subdued taciturn tasteful tight-lipped uncommunicative unexpressed unobtrusive unspeaking unuttered whist

ADJECTIVE

mum

Synonyms

STRONGEST

bashful

STRONG

mute quiet shy still

WEAK

buttoned-up closemouthed hushed muted nonvocal not forthcoming not talkative reserved secretive soundless speechless tight-lipped tongue-tied uncommunicative unsociable unspeaking voiceless wordless zipped

Antonyms

STRONG

agitated

ADJECTIVE

noncommittal

Synonyms

STRONGEST

ambiguous careful cautious circumspect discreet equivocal evasive judicious neutral tactful vague wary

WEAK

buttoned-up constrained even-steven guarded hush-hush incommunicable indefinite middle-of-the-road on-the-fence politic reserved restrained temporizing tentative unrevealing zipped

Antonyms

STRONGEST

careless certain clear decisive definite foolish hasty heedless incautious indiscreet positive rash reckless sure

WEAK

willing

ADJECTIVE

quiet

Synonyms

STRONGEST

muted peaceful reticent silent soft

STRONG

close hushed low muffled mute quieted reserved still stilled whist

WEAK

buttoned-up close-mouthed could hear a pin drop dumb hushful inaudible low-pitched noiseless not saying boo quiescent secretive soundless speechless taciturn tight-lipped uncommunicative unexpressed unspeaking unuttered

Antonyms

STRONGEST

clamorous communicative noisy

STRONG

unreserved

WEAK

agitated boisterous complex complicated intricate loud obtrusive troubled

ADJECTIVE

reticent

Synonyms

STRONGEST

bashful hesitant mum reserved restrained shy silent taciturn

WEAK

close close-mouthed dried-up dummied up tight-lipped uncommunicative unforthcoming unspeaking uptight

Antonyms

STRONGEST

communicative confident extroverted outgoing talkative unreserved unshy

WEAK

forward unrestrained

ADJECTIVE

secretive

Synonyms

STRONGEST

covert enigmatic reticent taciturn

WEAK

backstairs buttoned-up cagey close close-mouthed cryptic feline furtive hushed in chambers in privacy in private in the background in the dark on the Q.T. reserved silent tight-lipped undercover unforthcoming withdrawn zipped

Antonyms

STRONGEST

communicative

WEAK

forthright honest open

ADJECTIVE

silent

Synonyms

STRONGEST

hushed mum mute restrained reticent

WEAK

bashful buttoned-up checked close closed-up closemouthed curbed dumb dummied up faint hush iced inarticulate incoherent inconversable indistinct inhibited laconic mousy muted noiseless nonvocal not talkative reserved shy silentious soundless still struck dumb taciturn tongue-tied unclear uncommunicative unheard unsociable unspeaking voiceless wordless zipped

Antonyms

WEAK

clamorous communicative explicit noisy talkative tangible

ADJECTIVE

speechless

Synonyms

STRONGEST

amazed dazed dumb silent

WEAK

aghast aphonic astounded buttoned-up close-mouthed cool cool as cucumber dumbfounded dumbstruck inarticulate mum mute not saying boo reserved shocked taciturn thunderstruck tight-lipped tongue-tied uncommunicative unflappable voiceless wordless

Antonyms

WEAK

articulate communicative responsive

ADJECTIVE

still

Synonyms

STRONG

closed fixed halcyon hushed pacific sealed smooth stable static stock-still whist

WEAK

at rest buttoned-up close-mouthed dead deathlike deathly deathly quiet deathly still hushful inert lifeless noiseless peaceful placid restful serene silent soundless stagnant stationary tranquil undisturbed unruffled unstirring untroubled

Antonyms

STRONG

broken changeable unfixed variable

WEAK

agitated moving stirred unquiet

ADJECTIVE

taciturn

Synonyms

STRONGEST

aloof dour laconic reticent

WEAK

antisocial brooding close close-mouthed cold curt distant dried-up dumb mum mute quiet reserved sententious silent sparing speechless tight-lipped unexpressive unforthcoming withdrawn

Antonyms

WEAK

communicative fluent talkative wordy

ADJECTIVE

tight-lipped

Synonyms

WEAK

buttoned-up closemouthed dumb hushed mum mute muted not talkative quiet reserved restrained reticent secretive taciturn tongue-tied zipped

ADJECTIVE

tightlipped

Synonyms

STRONGEST

aloof dour mum reticent silent

WEAK

antisocial brooding close close-mouthed cold curt distant dried-up dumb incommunicable incommunicative laconic mute quiet reserved sententious sparing speechless tight-lipped uncommunicable uncommunicative unexpressive unforthcoming withdrawn

Antonyms

STRONGEST

communicative

ADJECTIVE

uncommunicable

Synonyms

WEAK

aloof antisocial brooding close close-mouthed cold curt distant dour dried-up dumb incommunicable incommunicative laconic mum mute quiet reserved reticent sententious silent sparing speechless tight-lipped tightlipped uncommunicative unexpressive unforthcoming withdrawn

ADJECTIVE

uncommunicative

Synonyms

WEAK

aloof buttoned-up close close-mouthed curt distant dried-up evasive guarded hush-hush offish on the Q.T. quiet reserved reticent retiring secretive short standoffish taciturn tight-lipped unapproachable unresponsive unsociable

Antonyms

WEAK

communicative confident extroverted responsive

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Normally so open in his media conferences, Amorim clammed up when he was asked to explain something he said on Christmas Eve about his preferred style of play.

From BBC • Jan. 3, 2026

However, he clammed up when Welker asked him to share other methods in which he might stay on.

From Salon • Mar. 30, 2025

With the Browns due to visit the Vikings on Sunday, the communication between Stefanski and Kubiak has clammed up for obvious reasons.

From Seattle Times • Sep. 30, 2021

“I completely clammed up with Jon Hamm because I’ve watched every season of Mad Men, like twice,” Cooper says.

From The Verge • Dec. 18, 2020

“Considering how you’ve clammed up since I mentioned Vivian, l think we can agree that shame leads to withdrawal and anger.”

From "Silent To The Bone" by E.L. Konigsburg

clammed up

Example Sentences

Related Words