Merriam-Webster Logo
SINCE 1828
Menu
dictionary thesaurus

Thesaurus

clam up

verb

Synonyms and Antonyms of clam up

to stop talking
  • the little girl clammed up when the doctor came into the room
Synonyms of clam up

belt up [British], dry up, dummy up, hush, pipe down, quiet (down), shut up
Words Related to clam up

calm (down), cool (down), settle (down)

haw, hem
Phrases Synonymous with clam up

hold one's tongue (or hold one's peace)
Near Antonyms of clam up

pipe up, sound off, speak out, speak up, spout (off), talk up
Antonyms of clam up

speak, talk

Learn More about clam up

  1. See words that rhyme with clam up Dictionary: Definition of clam up Spanish Central: Translation of clam up Nglish: Translation of clam up for Spanish speakers Britannica English: Translation of clam up for Arabic speakers

Seen and Heard

What made you want to look up clam up? Please tell us where you read or heard it (including the quote, if possible).

show comments hide comments

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

WORD OF THE DAY

chockablock

very full or close together

Get Word of the Day daily email!

TRENDING NOW

  1. crosshair Roger Stone posts controversial photo

  2. feckless Former RNC chair derides Trump

  3. emergency, national emergency Trump declares crisis over wall

SEE ALL

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

Words at Play

Ask the Editors

Word Games