unquestionable

/ənˈkwɛstʃɪnəbəl/

/ənˈkwɛstʃɪnəbəl/

Definitions of unquestionable

1. adjective

   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
2. adjective

   not counterfeit or copied
   “an unquestionable antique”

   synonyms: authentic, bona fide, veritable

   echt, genuine

   not fake or counterfeit
3. adjective

   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