unchallengeable

adjective
🔊/ʌnˈtʃælɪndʒəbl/
🔊/ʌnˈtʃælɪndʒəbl/
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  1. that cannot be questioned or argued with; that cannot be challenged不可争辩的;不容置辩的;不可挑战的
    • unchallengeable evidence无可置辩的证据
    Topics Opinion and argumentc2