"unchallengeable" in German unchallengeable unbestreitbar uanfechtbar unwiderlegbar Detailed translations for "unchallengeable" unchallengeable unchallengeable(also: undeniable, incontestable, undisputed) unbestreitbar unchallengeable uanfechtbar unchallengeable(also: irrefragable, incontrovertible) unwiderlegbar{adjectiv}