Definition of Doubtful
Quick Meaning of Doubtful
Feeling unsure about something or thinking that something might not be true or will not happen.
Detailed Definition of Doubtful
Feeling uncertainty or lack of confidence; questionable or unlikely; not clearly proven or trustworthy.
How to Pronounce Doubtful
How to Use Doubtful in a Sentence
Each example shows “doubtful” with a CEFR level so learners can pick examples that match their fluency.
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“I am doubtful about the accuracy of this information.”
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“The success of the project is doubtful without proper funding.”
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“It seems doubtful that she will arrive on time.”
Synonyms and Antonyms of Doubtful
Common Synonyms for Doubtful
Smart Synonyms for Doubtful — When to Use Each
- uncertain
- when you lack clear information about a situation
- skeptical
- when you have reservations and do not easily
- questionable
- when something validity or reliability is open to
Antonyms of Doubtful
Common Collocations with Doubtful
These phrases pair with “doubtful” in everyday English:
- doubtful about
- doubtful expression
- look doubtful
- doubtful prospect
Common Mistakes When Using Doubtful
Even fluent speakers slip up with “doubtful”. Here’s how to avoid the most common errors:
- ✗ Wrong: I am doubtful about whether she can finish it.
- ✓ Correct: I am doubtful that she can finish it.
- Why: Doubtful that is more direct and natural than doubtful about in this structure.
- ✗ Wrong: The team is doubtful to win the match.
- ✓ Correct: It is doubtful that the team will win the match.
- Why: Use doubtful that structure; doubtful to is not standard English.
Other Forms of Doubtful
- Adjective: doubtful
Frequently Asked Questions About Doubtful
What is the meaning of "Doubtful"?
Feeling unsure about something or thinking that something might not be true or will not happen.
How do you pronounce "Doubtful"?
The IPA is /ˈdaʊtfəl/.
What part of speech is "Doubtful"?
"Doubtful" is an adjective at B2 level (Common European Framework).
What are synonyms for "Doubtful"?
Common synonyms include uncertain, skeptical, unconvinced.
How do you use "Doubtful" in a sentence?
For example: "I am doubtful about the accuracy of this information."