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incontestable

Something incontestable can't be argued with — it's absolutely true or right. It's an incontestable fact that the earth rotates around the sun.

You can't dispute something that's truly incontestable, because it's absolutely clear and unmistakably true. The witness to a car accident could say that it's the incontestable fault of the driver who ran a red light. And once you've signed all the necessary forms and been handed the keys, you're the incontestable owner of your new car. Incontestable adds the "not" prefix, in-, to contestable, "opposable," or "arguable."

Definitions of incontestable
  1. adjective
    not open to question; obviously true
    synonyms: indisputable, undisputable
    undeniable
    not possible to deny
  2. adjective
    incapable of being contested or disputed
    synonyms: incontestible
    demonstrable, incontrovertible
    necessarily or demonstrably true
    demonstrated
    having been demonstrated or verified beyond doubt
    inarguable, unarguable
    against which no argument can be made
    bulletproof, unassailable, unshakable, watertight
    without flaws or loopholes
    unanswerable
    impossible to answer
    unquestionable
    incapable of being questioned
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    Antonyms:
    contestable
    capable of being contested
    challengeable
    capable of being challenged
    debatable, disputable
    capable of being disproved
    shakable, shakeable
    capable of being weakened
    questionable
    subject to question
    show more antonyms...
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