Antonyms for doubtful


Grammar : Adj
Spell : dout-fuhl
Phonetic Transcription : ˈdaʊt fəl


Definition of doubtful

Origin :
  • late 14c., from doubt (n.) + -ful. Related: Doubtfully; doubtfulness.
  • adj questionable, unclear
  • adj not believing
Example sentences :
  • In the broad pathways of the ocean such a chance is doubtful.
  • Extract from : « Brave and Bold » by Horatio Alger
  • And, if we do, it is doubtful if we can attract their attention.
  • Extract from : « Brave and Bold » by Horatio Alger
  • My errors, however, have at least made me cautious and doubtful of my own conclusions.
  • Extract from : « 'Tis Sixty Years Since » by Charles Francis Adams
  • It is doubtful if it was mentally prepared to entertain it, or evolve the idea.
  • Extract from : « The Conquest of Fear » by Basil King
  • It is doubtful if many of the others were any better off in this respect.
  • Extract from : « Ester Ried Yet Speaking » by Isabella Alden
  • It is doubtful if she would have realized its significance, had she seen it.
  • Extract from : « K » by Mary Roberts Rinehart
  • And it is doubtful if the Street would have been greatly concerned even had it known.
  • Extract from : « K » by Mary Roberts Rinehart
  • It is doubtful if his mind quite grasped the situation, even.
  • Extract from : « Thoroughbreds » by W. A. Fraser
  • It is doubtful if any of the higher rated motors have greater efficiency.
  • Extract from : « Flying Machines » by W.J. Jackman and Thos. H. Russell
  • The first one paused, doubtful which of the two dangers to choose.
  • Extract from : « A Woman Tenderfoot » by Grace Gallatin Seton-Thompson

Synonyms for doubtful

Based on : Thesaurus.com - Gutenberg.org - Dictionary.com - Random House Unabridged Dictionary, © Random House, Inc. 2019