资料来源 : pyDict

守口如瓶,一声不吭

资料来源 : WordNet®

clam up
     v : refuse to talk or stop talking; fall silent; "The children
         shut up when their father approached" [syn: {close up}, {dummy
         up}, {shut up}, {belt up}, {button up}, {be quiet}, {keep
         mum}] [ant: {open up}]