modified
assured, sure, unquestionable, indubitable, unquestioned, irrefutable, indisputable, undisputed, unchallenged, proved, proven, established, without question, settled, fixed; see also certain.
Antonyms questionable*, disputed, refuted.
See undoubted in Webster's New World Roget's A-Z Thesaurus II
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» archer
» assured
» attest
» certain
» charisma
» denunciation
» indisputable
» leapfrog
» martyrology
» questionable
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