没辙 (méi zhé): At a loss / no way out (Verb) — Meaning & Stroke Order

Faced with such a deadlock, both sides' representatives feel completely at a loss.

Do you mean you are also completely at a loss with this technical problem?

He is not at a loss; he just needs more time to conceive a solution.

Since conventional methods offer no way out, we might as well try some innovative thinking.