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English definition of “unquestionable”

unquestionable

adjective [not gradable]  /ʌnˈkwes·tʃə·nə·bəl/ us  
not open to question or doubt; indisputable: Her achievements are unquestionable.
unquestionably
adverb [not gradable]  /ʌnˈkwes·tʃə·nə·bli/ us  
Sakow is unquestionably the most remarkable woman writing today.
(Definition of unquestionable from the Cambridge Academic Content Dictionary © Cambridge University Press)
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