Definition of Certain
Quick Meaning of Certain
Feeling sure or confident that something is definitely true.
Detailed Definition of Certain
Sure or confident that something is true or will happen; having no doubt.
How to Pronounce Certain
Stress pattern: Oo (2-syllable word).
Tip: The ending is pronounced with a schwa sound: SER-tn̩. It sounds like 'SUR-tin' with the stress on the first syllable.
Watch out: Don't pronounce the 'ai' like in 'rain'; it's more like 'uh' with stress on first syllable: SER-tn̩.
Origin and Etymology of Certain
From Old French certein, derived from Latin certus (decided, settled, fixed).
How to Use Certain in a Sentence
Each example shows “certain” with a CEFR level so learners can pick examples that match their fluency.
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“I am certain that we will win the match tomorrow.”
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“The scientist was certain about her research findings after three years of testing.”
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“Are you certain you locked the door before leaving the house?”
Synonyms and Antonyms of Certain
Common Synonyms for Certain
Smart Synonyms for Certain — When to Use Each
- sure
- for everyday situations expressing confidence
- confident
- when showing personal belief or trust in oneself
Antonyms of Certain
Common Collocations with Certain
These phrases pair with “certain” in everyday English:
- for certain
- be certain
- almost certain
Common Mistakes When Using Certain
Even fluent speakers slip up with “certain”. Here’s how to avoid the most common errors:
- ✗ Wrong: I am certain to pass the exam.
- ✓ Correct: I am certain I will pass the exam.
- Why: Use a that-clause or main clause after 'certain about' rather than just infinitive when expressing confidence.
- ✗ Wrong: She was certain about his honesty.
- ✓ Correct: She was certain of his honesty.
- Why: Use 'certain of' when referring to belief in a quality or fact; 'certain about' is less common with abstract qualities.
Other Forms of Certain
Frequently Asked Questions About Certain
What is the meaning of "Certain"?
Feeling sure or confident that something is definitely true.
How do you pronounce "Certain"?
The IPA is /ˈsɜːrtn̩/. The ending is pronounced with a schwa sound: SER-tn̩. It sounds like 'SUR-tin' with the stress on the first syllable.
What part of speech is "Certain"?
"Certain" is an adjective at A2 level (Common European Framework).
What are synonyms for "Certain"?
Common synonyms include sure, confident, convinced.
How do you use "Certain" in a sentence?
For example: "I am certain that we will win the match tomorrow."