Wiktionary
inarguable
a. Not arguable; certain, incontestable or incontrovertible.
WordNet
inarguable
adj. against which no argument can be made [syn: unarguable]
Usage examples of "inarguable".
But that sovereign must be limited to the most inarguable governmental functions, presiding over individuals and societies which were allowed to be themselves.
Torin made the statement in a tone so flatly inarguable, her entire audience blinked in near unison.