clam up
verb
Definition of clam up
intransitive verb
: to become silent clammed up and refused to talk
From the M-W Editors
Examples of clam up in a Sentence
the little girl clammed up when the doctor came into the room
1916
First Known Use of clam up
1916
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See words that rhyme with clam up Thesaurus: All synonyms and antonyms for clam up Nglish: Translation of clam up for Spanish speakers Britannica English: Translation of clam up for Arabic speakers
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