adjective. not able to be turned. unturnable door handles.

What is an untenable situation?

If something is untenable, you can't defend it or justify it. If your disagreement with your teacher puts you in an untenable position, you better just admit you made a mistake and get on with it.

What does untenable mean in a sentence?

not able to be supported or defended against criticism, or no longer able to continue: The position of the players' union has become untenable.