Words similar to non-negotiable

Example sentences for: non-negotiable

How can you use “non-negotiable” in a sentence? Here are some example sentences to help you improve your vocabulary:

Newt Gingrich tried ruling by non-negotiable demand and ended up with Republican congressional candidates denying any knowledge of his existence.
The main sticking point in the talks is that the Serbs don't want NATO forces to police the agreement in Kosovo while the United States says this is non-negotiable.
The AFL-CIO considers this non-negotiable, as do most Democrats.
Couldn't (and shouldn't) the Writers Guild simply make this a non-negotiable issue and change the custom overnight?