clam up

verb

Definition of clam up

: to become silent
  • clammed up and refused to talk

Examples of clam up in a Sentence

  1. the little girl clammed up when the doctor came into the room

First Known Use of clam up

1916

in the meaning defined above

See Words from the same year
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clam up Synonyms

Antonyms

speak, talk;

Phrases

hold one's tongue (or hold one's peace);



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