英 [klæm ʌp] 美 [klæm ʌp]
变得沉默：指变得不说话，拒绝交谈。
clam up //
动词 to keep or become silent or withhold information 拒不开口
拒不开口
... chow down吃饭 clam up住口，不说话（原意为“蚌壳合起来”） chill out缓和情绪，冷静下来 ...
... clam up v. 拒不开口 Faculty meetings 教授会,教员会议 in check 在控制中;被阻止;(象棋中)(敌方主帅)处于被将军地位 ...
Clam Up(守口如瓶), 此释义来源于网络辞典。
... chin music 应酬话，闲聊 clam up 守口如瓶，沉默不语 clip joint 高消费的场所 ...
Every time they were used, the detainee would clam up as they were scared that anything they said would make that pressure increase.
每次使用它们时，受审者都保持沉默，好像他们害怕一旦说了什么，就会增加压力。
Will you clam up! The boss is talking.
请你保持安静！老板在说话。
You can't clam up.
你不能沉默。
More than almost anything, I would like Lady Gaga to clam up for a while.
FORBES: Dear Justin Timberlake and Lady Gaga: Please don't make me choose
Do we really want employees to clam up, in fear of future liability, instead of discussing their concerns?
FORBES: Justice Dept.'s S&P Suit Long On Chatter, Short On Substance
If you tend to clam up in social settings, try having a few topics and answers ready to discuss.