to clam up 拒絕開口(俚語)
英文釋義
To stop talking further; to become silent and uncooperative.
例句
I tried to determine who had created the problem at work, but when I asked the staff, they all clamed up because they wanted to protect each other.
我想確定是誰在工作中製造的問題,但當我問員工時,他們都不肯說,想互相保護。