Adjective: incontestable ,in-kun'tes-tu-bul
- Incapable of being contested or disputed
"The DNA evidence provided incontestable proof of his innocence";
- incontestible
- Not open to question; obviously true
"incontestable evidence of a witness";
- indisputable, undisputable
See also: bulletproof, demonstrable, demonstrated, inarguable, incontrovertible, ironclad, unanswerable, unarguable, unassailable, undeniable, unquestionable, unshakable, unshakeable, watertight
Antonym: contestable