Definition of unquestionable in US English:

unquestionable

adjective

  • Not able to be disputed or doubted.

    ‘his musicianship is unquestionable’
    • ‘Charm may have replaced the rapier assertiveness of the young composer, but his authority as one of the guiding lights of music in our time is as unquestionable as ever.’
    • ‘That someone will benefit is unquestionable, but whether it will be Montserrat depends largely on this response.’
    • ‘They are also trying to make themselves the unquestionable experts on countryside matters, which they most definitely are not.’
    • ‘He is an honourable gentleman of unquestionable character.’
    • ‘His work rate had always been good, his commitment undoubted and his character unquestionable.’
    • ‘Well done - you've discovered the unquestionable truth about everyone's favourite documentarian call-girl.’
    • ‘That the Liberal brand today is dirtied and dishonored is unquestionable, and an insult to the nation of people its leaders pledged to serve.’
    • ‘What won our affection towards this restaurant was not its undeniable quality so much as its unquestionable quirkiness.’
    • ‘I really, really hope evidence will be laid on the table, unquestionable evidence.’
    • ‘Ultimately, however, the importance of legitimacy goes beyond its unquestionable utility.’
    • ‘It is unquestionable that in future years UW will undoubtedly see the reshaping or even renaming of this student hub.’
    • ‘We still tend to consider people in higher positions unmovable and unquestionable, just like our kings were.’
    • ‘The integrity of my new economic team is unquestionable.’
    • ‘And they are in power in a United States that enjoys unquestionable military supremacy and thus has modified its approach to alliances.’
    • ‘Presumably he also believes in the Immaculate Conception and the unquestionable infallibility of that elderly Polish chap in the Vatican.’
    • ‘Is the evidence genuine and of unquestionable origin?’
    • ‘As with all OTC productions, the supporting crew have created a production of unquestionable professionalism.’
    • ‘Spartan dominance rose from its unquestionable position as the preeminent continental army of the region.’
    • ‘Whether this can be viewed as mere rhetoric or not is a debatable issue, but the message it sends to radical groups within Iran is unquestionable.’
    • ‘That every child has the right to a family seems unquestionable when you consider the havoc wreaked on those who spend their lives as part of a social worker's caseload.’
    indubitable, undoubted, beyond question, beyond doubt, indisputable, undeniable, irrefutable, incontestable, incontrovertible, unimpeachable, unambiguous, unequivocal, unassailable
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Pronunciation

unquestionable

/ˌənˈkwesCHənəb(ə)l//ˌənˈkwɛstʃənəb(ə)l/