unquestionable

Definitions of unquestionable
1

adj incapable of being questioned

unquestionable authority”
Synonyms:
incontestable, incontestible
incapable of being contested or disputed
undeniable
not possible to deny
acknowledged
generally accepted
beyond doubt, indubitable
too obvious to be doubted
for sure
not open to doubt
mathematical
beyond question
unimpeachable
beyond doubt or reproach
Antonyms:
questionable
subject to question
contestable
capable of being contested
alleged, so-called, supposed
doubtful or suspect
apocryphal
being of questionable authenticity
debatable, problematic, problematical
open to doubt or debate
doubtful, dubious, dubitable, in question
open to doubt or suspicion
equivocal
open to question
fishy, funny, shady, suspect, suspicious
not as expected
impugnable
subject to being discredited
self-styled, soi-disant
as claimed by and for yourself often without justification
show more antonyms...

adj not counterfeit or copied

“an unquestionable antique”
Synonyms:
authentic, bona fide, veritable
echt, genuine
not fake or counterfeit

adj not open to question

“an unquestionable (or unequivocal) loss of prestige”
Synonyms:
unambiguous, unequivocal, univocal
admitting of no doubt or misunderstanding; having only one meaning or interpretation and leading to only one conclusion

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