impasse
n. C1 Advanced US //ˈɪmˌpæs// UK //ɪmpˈɑːs// im·passe
n. a situation where no progress is possible because people cannot agree on a solution. It is like a dead end where you cannot move forward.
n. a situation in which no progress is possible, especially because of a disagreement or a deadlock. Often used in political, legal, or diplomatic contexts.
The two countries reached an impasse over the trade deal.
After hours of negotiation, the committee found themselves at an impasse regarding the new safety regulations.
The legislative process stalled at an impasse, with neither party willing to compromise on the core issues of the proposed environmental reform.
Borrowed from French impasse.