Commitment vs I know i broke my oath vs Pledge vs Promise

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

Commitment

Top 2,000 (common)B2noun

I know i broke my oath

Beyond 10,000 (less common)

Pledge

FormalTop 2,000 (common)C1verb

Promise

Top 1,000 (very common)A2verb
Most formal: PledgeMost common: Promise
 CommitmentI know i broke my oathPledgePromise
Pronunciation🇬🇧 /["/kəˈmɪtmənt/"]/🇺🇸 /["/kəˈmɪtmənt/"]/🇬🇧 //aʊθ//🇺🇸 //oʊθ//🇬🇧 //plɛdʒ//🇺🇸 //plɛdʒ//🇬🇧 /["/ˈprɒmɪs/","/ˈprɒmɪsɪz/","/ˈprɒmɪst/","/ˈprɒmɪsɪŋ/"]/🇺🇸 /["/ˈprɑːmɪs/","/ˈprɑːmɪsɪz/","/ˈprɑːmɪst/","/ˈprɑːmɪsɪŋ/"]/
MeaningA promise to do something or stay loyal.I promised to do something and didn't.To make a serious promise or commitment.A commitment to do something or not do something.
ExampleHis commitment to the project ensured its success.I know I broke my oath to protect the kingdom.She decided to pledge her support to the charity event.I promise to help you with your homework.
RegisterNeutralNeutralFormalNeutral
How commonTop 2,000 (common)Beyond 10,000 (less common)Top 2,000 (common)Top 1,000 (very common)
CEFR levelB2-C1A2
Part of speechnounverbverb
Collocationsabsolute, complete, full, degree, level, give, make, demonstrate, commitment on, commitment to, a lack of commitment, absolute, complete, full, degree, level, give, make, demonstrate, commitment on, commitment to, a lack of commitment, big, considerable, major, have, take on, fulfil/​fulfill, commitment on, heavy, time, commitment ofhonor an oath, take an oath, break an oathpledge allegiance, pledge support, pledge a donationfaithfully, solemnly, initially, can, cannot, seem to, to, as promised, I can’t promise anything
Antonymsdisloyalty, indifference-renounce, disavow, withdrawlie, break, betray
Common mistakesUsing 'commitment' without specifying what it's to., Confusing 'commitment' with 'commit' as a verb., 'Commitment' often misused in informal contexts.Confusing 'oath' with 'oath of office', which is specific to political positions., Using 'broke' incorrectly with non-physical items; it applies to commitments., Mispronouncing 'oath' as it is not spelled phonetically.Confused with 'pledged' vs 'pledge' as different tenses., Omitting the object after the verb., Using 'pledge' when referring to a general promise instead of a formal commitment.Confusing 'promise' with 'vow' or 'pledge' in terms of strength., Using 'promise' without an object (e.g., 'I promise' should specify what)., Misusing in the past tense (e.g., 'I promised' without a follow-up).
Usage notesUsed when discussing promises or obligations in personal or professional contexts. It's generally appropriate in serious discussions and may not fit casual chatting.Use in discussions about promises, commitments, or moral obligations. It's neutral but may be serious depending on context.Typically used in formal contexts, such as during ceremonies or official statements. Avoid in casual conversations.Use 'promise' when you want to express a vow or assurance. Common in both spoken and written contexts, but avoid in formal legal documents.

See it in real clips

Commitment
I know i broke my oath
Pledge
Promise

Frequently asked questions: Commitment vs I know i broke my oath vs Pledge vs Promise

What's the difference between Commitment, I know i broke my oath, Pledge, and Promise?

Commitment: A promise to do something or stay loyal. I know i broke my oath: I promised to do something and didn't. Pledge: To make a serious promise or commitment. Promise: A commitment to do something or not do something.

Which is more formal: Commitment, I know i broke my oath, Pledge, and Promise?

Pledge is the most formal of these.

Which is more common: Commitment, I know i broke my oath, Pledge, and Promise?

Promise is the most common in everyday English.

Which is more advanced: Commitment, I know i broke my oath, Pledge, and Promise?

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

Can you show an example of each?

Commitment: His commitment to the project ensured its success. I know i broke my oath: I know I broke my oath to protect the kingdom. Pledge: She decided to pledge her support to the charity event. Promise: I promise to help you with your homework.

Can I use Commitment, I know i broke my oath, Pledge, and Promise interchangeably?

Not always. Commitment, I know i broke my oath, Pledge, and Promise 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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