The Collaborative International Dictionary
Uncontestable
Uncontestable \Un`con*test"a*ble\, a. Incontestable.
Wiktionary
uncontestable
a. Not contestable.
Usage examples of "uncontestable".
Whatever else was true about the tales of the rogue ship Raphael, it was uncontestable that His Holiness's Crusade against the Ousters had been set back years by the hit-and-run attacks.