Begin vs Commence vs Initiate

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

Begin

Top 1,000 (very common)A1verb

Commence

FormalTop 3,000 (common)C1verb

Initiate

Top 2,000 (common)C1verb
Most formal: CommenceMost common: Begin
 BeginCommenceInitiate
Pronunciation🇬🇧 /["/bɪˈɡɪn/","/bɪˈɡɪnz/","/bɪˈɡæn/","/bɪˈɡʌn/","/bɪˈɡɪnɪŋ/"]/🇺🇸 /["/bɪˈɡɪn/","/bɪˈɡɪnz/","/bɪˈɡæn/","/bɪˈɡʌn/","/bɪˈɡɪnɪŋ/"]/🇬🇧 //kəˈmɛns//🇺🇸 //kəˈmɛns//🇬🇧 /["/ɪˈnɪʃieɪt/","/ɪˈnɪʃieɪts/","/ɪˈnɪʃieɪtɪd/","/ɪˈnɪʃieɪtɪŋ/"]/🇺🇸 /["/ɪˈnɪʃieɪt/","/ɪˈnɪʃieɪts/","/ɪˈnɪʃieɪtɪd/","/ɪˈnɪʃieɪtɪŋ/"]/
MeaningTo start something.To start or begin something.To start something.
ExampleI will begin my homework after dinner.The ceremony will commence at noon.to initiate legal proceedings against somebody
RegisterNeutralFormalNeutral
How commonTop 1,000 (very common)Top 3,000 (common)Top 2,000 (common)
CEFR levelA1C1C1
Part of speechverbverbverb
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 studiesformally, immediately, recently
Antonymsend, finish, concludecease, stop, endterminate, end, cease
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'.Confused with 'initiation' which is the process of starting something., Using it in informal settings where simpler words like 'start' are preferred., Forgetting to use an object after 'initiate', such as 'initiate a project.'
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.Use 'initiate' in contexts where a formal or official start is needed, like in business or academic settings. It may feel too formal in casual conversations.

See it in real clips

Commence

Frequently asked questions: Begin vs Commence vs Initiate

What's the difference between Begin, Commence, and Initiate?

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

Which is more formal: Begin, Commence, and Initiate?

Commence is the most formal of these.

Which is more common: Begin, Commence, and Initiate?

Begin is the most common in everyday English.

Are Begin, Commence, and Initiate the same CEFR level?

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

What part of speech are Begin, Commence, and Initiate?

Begin: verb, Commence: verb, Initiate: verb.

Can you show an example of each?

Begin: I will begin my homework after dinner. Commence: The ceremony will commence at noon. Initiate: to initiate legal proceedings against somebody

Can I use Begin, Commence, and Initiate interchangeably?

Not always. Begin, Commence, and Initiate 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.

Related comparisons