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dubious

[doo-bee-uh s, dyoo-]
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adjective
  1. doubtful; marked by or occasioning doubt: a dubious reply.
  2. of doubtful quality or propriety; questionable: a dubious compliment; a dubious transaction.
  3. of uncertain outcome: in dubious battle.
  4. wavering or hesitating in opinion; inclined to doubt.

Origin of dubious

1540–50; < Latin dubius; see -ous
Related formsdu·bi·ous·ly, adverbdu·bi·ous·ness, nounsu·per·du·bi·ous, adjectivesu·per·du·bi·ous·ly, adverbsu·per·du·bi·ous·ness, nounun·du·bi·ous, adjectiveun·du·bi·ous·ly, adverbun·du·bi·ous·ness, noun

Synonyms

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1. equivocal, ambiguous, obscure, unclear. 4. undecided, uncertain, hesitant, fluctuating.

Synonym study

4. See doubtful.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for undubiously

dubious

adjective
  1. marked by or causing doubta dubious reply
  2. unsettled in mind; uncertain; doubtful
  3. of doubtful quality; untrustworthya dubious reputation
  4. not certain in outcome
Derived Formsdubiously, adverbdubiousness, noun

Word Origin

C16: from Latin dubius wavering
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for undubiously

dubious

adj.

1540s, from Latin dubiosus "doubtful," from dubium "doubt," neuter of dubius "vacillating, moving two ways, fluctuating;" figuratively "wavering in opinion, doubting, doubtful," from duo "two" (see two), with a sense of "of two minds, undecided between two things." Old English also used tweo "two" to mean "doubt." Cf. doubt (v.). Related: Dubiously; dubiousness.

Online Etymology Dictionary, © 2010 Douglas Harper