Assume vs Presume

When to use each in English, with meaning, register, and examples.

Assume

Top 1,000 (very common)B2verb

Presume

Top 3,000 (common)C1verb
Most common: Assume
 AssumePresume
Pronunciation🇬🇧 /["/əˈsjuːm/","/əˈsjuːmz/","/əˈsjuːmd/","/əˈsjuːmɪŋ/"]/🇺🇸 /["/əˈsuːm/","/əˈsuːmz/","/əˈsuːmd/","/əˈsuːmɪŋ/"]/🇬🇧 /["/prɪˈzjuːm/","/prɪˈzjuːmz/","/prɪˈzjuːmd/","/prɪˈzjuːmɪŋ/"]/🇺🇸 /["/prɪˈzuːm/","/prɪˈzuːmz/","/prɪˈzuːmd/","/prɪˈzuːmɪŋ/"]/
MeaningTo take something as true without proof.To think something is true without proof.
ExampleI assume you will be attending the meeting tomorrow.I presume you have already completed the assignment.
RegisterNeutralNeutral
How commonTop 1,000 (very common)Top 3,000 (common)
CEFR levelB2C1
Part of speechverbverb
Collocationsautomatically, naturally, reasonably, can, might, tend to, let us assumecorrectly, wrongly, reasonably, be presumed dead, be presumed guilty, be presumed innocent, correctly, wrongly, reasonably, be presumed dead, be presumed guilty, be presumed innocent
Antonymsdoubt, disregard, questiondoubt, disbelieve, reject
Common mistakesOften confused with 'presume', which implies a stronger basis for belief., Mistakenly used in place of 'guess', which is more uncertain.Confused with 'assume' — assume can imply less certainty., Using 'presume' in place of 'presumed' incorrectly., Misplacing the object; 'presume that' is more specific.
Usage notesCommonly used in everyday conversation and writing. Avoid using 'assume' in very formal contexts where more precise language is needed.Use 'presume' when you're making a reasonable guess based on available information. Avoid in formal situations that require certainty. Suitable for casual conversations.

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Assume

Frequently asked questions: Assume vs Presume

What's the difference between Assume and Presume?

Assume: To take something as true without proof. Presume: To think something is true without proof.

Which is more common: Assume and Presume?

Assume is the most common in everyday English.

Which is more advanced: Assume and Presume?

Presume is the highest level, at C1, on the CEFR scale.

Are Assume and Presume the same CEFR level?

Assume: B2, Presume: C1 on the CEFR scale.

What part of speech are Assume and Presume?

Assume: verb, Presume: verb.

Can you show an example of each?

Assume: I assume you will be attending the meeting tomorrow. Presume: I presume you have already completed the assignment.

Can I use Assume and Presume interchangeably?

Not always. Assume and Presume are related and overlap in some contexts, but they differ in register, how common they are, and usage, so swapping one for another can change the meaning or tone. Check the differences above before substituting.