incontestable
adjective /ˌɪnkənˈtestəbl/
/ˌɪnkənˈtestəbl/
(formal)- that is true and cannot be disagreed with or denied synonym indisputable
- an incontestable right/fact
- His claim to the land is incontestable.
Word Originlate 17th cent.: from French, or from medieval Latin incontestabilis, from in- ‘not’ + contestabilis ‘able to be called upon in witness’, from the verb contestari (from con- ‘together’ + testare ‘to witness’).