Word.ws English Dictionary

undoubtful

undoubtful adjective: not doubtful.

Adjective

undoubtful (not comparable)

  1. Not doubtful.
    • I was utterly unconscious of this irregularity, and might have remained so, had not a friend the next day asked me the reason of it. Indeed I should have disbelieved that it had taken place, had not the testimony of several persons rendered it undoubtful.1844, William Clowes, The Journals of William Clowes: A Primitive Methodist Preacher

Origin of undoubtful

From un- + doubtful.

Words formed from undoubtful

Questions about undoubtful

What does undoubtful mean?
Undoubtful means not doubtful.
What part of speech is undoubtful?
Undoubtful is an adjective.

Words near undoubtful in the dictionary

  1. undoubtable
  2. undoubtably
  3. undoubted
  4. undoubtedly
  5. undoubtedness
  6. undoubtful
  7. undoubtfully
  8. undoubtfulness
  9. undoubting
  10. undoubtingly
  11. undoubtingness

Source and license

Adapted from Wiktionary: undoubtful (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

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