C1 adjective /ʌnˈkwes.tʃən.ə.bl̩/
Unquestionable
unbestreitbar; sicher
Meaning
not able to be disputed or doubted; certain and beyond doubt
Example
Her honesty and integrity are unquestionable qualities.
Ihre Ehrlichkeit und Integrität sind unbestreitbare Qualitäten.