clam up

Suddenly stop talking

To clam up is to suddenly stop talking or refuse to speak, especially when questioned or pressed for information.

The image is of a clam snapping its shell shut.

She was chatty until I asked about her ex, then she clammed up.

Someone who clams up becomes tight-lipped, guarded, or uncooperative.

silent

tight-lipped

Unwilling to divulge

quiet · hushed · taciturn · laconic · uncommunicative · unresponsive · reticent · reserved · inarticulate · tongue-tied

shy

bashful

Uncomfortably self-conscious

diffident · introverted · withdrawn · shrinking · meek · mousy · sheepish · nervous · awkward · uncomfortable

guarded

defensive

Protective or easily threatened

distrustful · evasive · cagey · circumspect · reluctant · hesitant · careful · discreet · protective · withholding

secretive

secretive

Inclined to conceal

surreptitious · hidden · concealing · cryptic · enigmatic · mysterious · confidential · hush-hush · under wraps · incognito

anxious

nervous

Uneasy and apprehensive

apprehensive · panicked · frozen · paralyzed · rattled · flustered · overwhelmed · intimidated · spooked · startled

Categories
Opposites
verbal communication/disclosure

clam upopen up

Reveal inner thoughts

spill the beans · talk · blab · spill · confess

emotional openness

clam upopen up

Reveal inner thoughts

pour one's heart out · bare one's soul · confide · let it all out · let one's guard down

Family

clam, exclaim, reclaim, proclaim, acclaim, disclaim, disclaimer, clammed up, declamatory

Familiarity
Top 100,000
Profile
Known to kids · Used worldwide · Timeless · Everyday, not technical · Rated G