Begin vs Commence

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

Begin

Top 1,000 (very common)A1verb

Commence

FormalTop 3,000 (common)C1verb
Most formal: CommenceMost common: Begin
 BeginCommence
Pronunciation🇬🇧 /["/bɪˈɡɪn/","/bɪˈɡɪnz/","/bɪˈɡæn/","/bɪˈɡʌn/","/bɪˈɡɪnɪŋ/"]/🇺🇸 /["/bɪˈɡɪn/","/bɪˈɡɪnz/","/bɪˈɡæn/","/bɪˈɡʌn/","/bɪˈɡɪnɪŋ/"]/🇬🇧 //kəˈmɛns//🇺🇸 //kəˈmɛns//
MeaningTo start something.To start or begin something.
ExampleI will begin my homework after dinner.The ceremony will commence at noon.
RegisterNeutralFormal
How commonTop 1,000 (very common)Top 3,000 (common)
CEFR levelA1C1
Part of speechverbverb
Collocationsagain, all over again, anew, be due to, be expected to, be scheduled to, by, with, begin at the beginning, be just beginning, be only beginning, again, all over again, anew, be due to, be expected to, be scheduled to, by, with, begin at the beginning, be just beginning, be only beginningcommence operations, commence proceedings, commence studies
Antonymsend, finish, concludecease, stop, end
Common mistakesConfusing 'begin' with 'start' in casual contexts., Incorrectly using it without an object, e.g., 'I will begin.' instead of 'I will begin the project.', Using 'began' instead of 'begin' in present tense situations.Used incorrectly in informal contexts where simpler 'start' would be better., Confused with 'committed' due to similar sounds., Often misspelled as 'comence'.
Usage notesUse 'begin' in most contexts, both spoken and written. It’s appropriate for formal situations but can also be used informally. Avoid using in very casual contexts where a simpler word like 'start' may be better.Used in formal writing and speeches. It's less common in everyday conversation. Often used in legal and professional contexts.

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Begin
Commence

Frequently asked questions: Begin vs Commence

What's the difference between Begin and Commence?

Begin: To start something. Commence: To start or begin something.

Which is more formal: Begin and Commence?

Commence is the most formal of these.

Which is more common: Begin and Commence?

Begin is the most common in everyday English.

Which is more advanced: Begin and Commence?

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

Are Begin and Commence the same CEFR level?

Begin: A1, Commence: C1 on the CEFR scale.

What part of speech are Begin and Commence?

Begin: verb, Commence: verb.

Can you show an example of each?

Begin: I will begin my homework after dinner. Commence: The ceremony will commence at noon.

Can I use Begin and Commence interchangeably?

Not always. Begin and Commence 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.

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