Definition of Certainly
Quick Meaning of Certainly
Definitely or for sure; used to show you are confident or to agree with someone.
Detailed Definition of Certainly
Without doubt; definitely; in a way that shows confidence or agreement.
How to Pronounce Certainly
Stress pattern: Ooo (3-syllable word).
Tip: Pronounce with stress on the first syllable: SER-tn̩-lee. The middle part sounds like a quick 'tn̩' (schwa with n).
Watch out: Don't say 'SER-tin-lee'; the second syllable contains a schwa: 'SER-tn̩-lee'. The 'ai' is quick and unstressed.
Origin and Etymology of Certainly
Adverb form of 'certain', formed with the suffix -ly.
How to Use Certainly in a Sentence
Each example shows “certainly” with a CEFR level so learners can pick examples that match their fluency.
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“You will certainly enjoy the movie if you like action films.”
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“The project is certainly going to take longer than we initially planned.”
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“A: Can you help me? B: Certainly, I'd be happy to assist you.”
Synonyms and Antonyms of Certainly
Common Synonyms for Certainly
Smart Synonyms for Certainly — When to Use Each
- definitely
- for emphasis on the truth or accuracy of
- of course
- when politely agreeing or confirming someone's request
Common Collocations with Certainly
These phrases pair with “certainly” in everyday English:
- certainly not
- certainly will
- certainly can
Common Mistakes When Using Certainly
Even fluent speakers slip up with “certainly”. Here’s how to avoid the most common errors:
- ✗ Wrong: He will certainly to come to the party.
- ✓ Correct: He will certainly come to the party.
- Why: After 'will certainly', use the base verb form, not 'to' infinitive.
- ✗ Wrong: I certainly am thinking that you are wrong.
- ✓ Correct: I certainly think that you are wrong.
- Why: Use 'certainly' before the main verb, not with continuous form when expressing opinion.
Other Forms of Certainly
Frequently Asked Questions About Certainly
What is the meaning of "Certainly"?
Definitely or for sure; used to show you are confident or to agree with someone.
How do you pronounce "Certainly"?
The IPA is /ˈsɜːrtnli/. Pronounce with stress on the first syllable: SER-tn̩-lee. The middle part sounds like a quick 'tn̩' (schwa with n).
What part of speech is "Certainly"?
"Certainly" is an adverb at A2 level (Common European Framework).
What are synonyms for "Certainly"?
Common synonyms include definitely, surely, absolutely.
How do you use "Certainly" in a sentence?
For example: "You will certainly enjoy the movie if you like action films."