Definition of Questionable
Quick Meaning of Questionable
Not definitely good or certainly true; open to doubt.
Detailed Definition of Questionable
Doubtful or uncertain in quality; not clearly true or reliable.
How to Pronounce Questionable
Stress pattern: Oooo (4-syllable word).
Tip: Stress the first syllable: QUES-chun-uh-bul.
How to Use Questionable in a Sentence
Each example shows “questionable” with a CEFR level so learners can pick examples that match their fluency.
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“That claim has questionable evidence supporting it.”
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“His methods are questionable from an ethical standpoint.”
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“The questionable quality of the product disappointed customers.”
Synonyms and Antonyms of Questionable
Common Synonyms for Questionable
Smart Synonyms for Questionable — When to Use Each
- doubtful
- when emphasizing personal uncertainty or skepticism
- dubious
- when suggesting suspicion that something is dishonest
- uncertain
- for neutral lack of clarity without judgment
Common Collocations with Questionable
These phrases pair with “questionable” in everyday English:
- questionable decision
- questionable ethics
- questionable source
- highly questionable
Common Mistakes When Using Questionable
Even fluent speakers slip up with “questionable”. Here’s how to avoid the most common errors:
- ✗ Wrong: The reliability of that source is very questionable.
- ✓ Correct: The reliability of that source is quite questionable.
- Why: Use "quite" or "highly" with questionable; "very" is less natural.
- ✗ Wrong: That is a questionable of decision.
- ✓ Correct: That is a questionable decision.
- Why: No preposition between adjective and noun in this phrase.
Other Forms of Questionable
- Adjective: questionable
- Adverb: questionably
Frequently Asked Questions About Questionable
What is the meaning of "Questionable"?
Not definitely good or certainly true; open to doubt.
How do you pronounce "Questionable"?
The IPA is /ˈkwɛstʃənəbəl/. Stress the first syllable: QUES-chun-uh-bul.
What part of speech is "Questionable"?
"Questionable" is an adjective at B2 level (Common European Framework).
What are synonyms for "Questionable"?
Common synonyms include doubtful, uncertain, dubious.
How do you use "Questionable" in a sentence?
For example: "That claim has questionable evidence supporting it."