Skip to main content
doubtful

doubtful

14 3.0
Not sure about something and not ready to believe it
  • adjective
  • /ˈdaʊt.fəl/
: dudoso
  • The world is increasingly doubtful that Beijing will reform politically and become a responsible global actor.
  • seem doubtful
  • highly doubtful
  • particularly doubtful

Let go of the let go of the doubtful thoughts.

Autoplay Next

Examples

  • The teacher was doubtful that the program would be extended to the following year.

    Academic text (2003)
  • "Leah did not reply but, looking rather doubtful, merely stirred the milk into her coffee.

    Fiction book (1990)
  • It's doubtful that he'll ever speak again.

  • It's doubtful they can hold out much longer.

  • After all, it is highly doubtful that any public survey will show most.

    Academic text (1993)
  • Now at this point, it's doubtful that this other source will be hydrogen.

  • I think it's doubtful, don't you?

  • Alan was highly doubtful that Meg Harris was a woman he would have liked.

    Fiction book (1996)
  • "You'll be great at it," he'd said when she sounded doubtful about the group.

    Fiction book (1999)
  • It's doubtful that he will ever speak again.

Synonyms

skeptical
vsdoubtful
  • US
261 4.2

Not easily believing that something is true

is milder uncertainty rather than a deliberate attitude of mistrust
unsure
vsdoubtful
99 1.5

Not confident or certain about what to do

is more about lacking belief or persuasion than low personal confidence
dubious
vsdoubtful
88 6.5

Not clearly true or trustworthy and causing doubt

is plain uncertainty, not the extra idea of untrustworthiness
hesitant
vsdoubtful
72 3.2

Slow to act or speak because you feel unsure

is the internal feeling of uncertainty rather than the slow action it causes
tentative
vsdoubtful
55 5.1

Made or said without being fully certain, often as a trial

is general uncertainty in feeling, not specifically a provisional or trial state
uncertain
vsdoubtful
41 3.9

Not feeling sure or confident

is about visibly feeling or showing uncertainty rather than a quiet state
unconvinced
vsdoubtful
12 5.1

Not sure that something is true or will work

is a general uncertainty feeling rather than specific lack of persuasion
doubty
vsdoubtful
  • Archaic
1 9.9

Not sure what will happen or what people will decide

is the modern common form rather than the older usage

Antonyms

759 2.5

Feeling sure about yourself or what will happen

722 1.0

Feeling sure and having no doubt

How Doubtful

incredulous
19 6.8
skeptical
  • US
261 4.2
doubtful
14 3.0
uncertain
41 3.9
certain
286 1.0

Surface Forms

doubtful positive
doubtfuler comparative
doubtfulest superlative

Morphology

doubtful = doubt (transparent) = doubt + ful

The adjective is directly formed from 'doubt' + '-ful' meaning 'full of doubt' and is easily predictable for learners.

Etymology

Doubtful comes from the old Latin word dubius, related to duo meaning 'two', as if you have 'two minds' about something. So to be doubtful is to feel unsure or not convinced.