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

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

Vow

FormalTop 3,000 (common)C1verb
 CommitmentI know i broke my oathPledgeVow
Pronunciation🇬🇧 /["/kəˈmɪtmənt/"]/🇺🇸 /["/kəˈmɪtmənt/"]/🇬🇧 //aʊθ//🇺🇸 //oʊθ//🇬🇧 //plɛdʒ//🇺🇸 //plɛdʒ//🇬🇧 /["/vaʊ/","/vaʊz/","/vaʊd/","/ˈvaʊɪŋ/"]/🇺🇸 /["/vaʊ/","/vaʊz/","/vaʊd/","/ˈvaʊɪŋ/"]/
MeaningA promise to do something or stay loyal.I promised to do something and didn't.To make a serious promise or commitment.A serious promise to 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.She vowed never to speak to him again.
RegisterNeutralNeutralFormalFormal
How commonTop 2,000 (common)Beyond 10,000 (less common)Top 2,000 (common)Top 3,000 (common)
CEFR levelB2-C1C1
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 donationquietly, silently, to, vow never to do something, vow revenge, vow revenge against somebody
Antonymsdisloyalty, indifference-renounce, disavow, withdrawbreak, violate
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.Confused with 'cow' — they sound similar but have different meanings., Using in informal contexts — 'vow' is too strong for casual promises.
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 'vow' when making a serious commitment, often in formal situations like weddings or ceremonies. Avoid in casual conversations.

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Commitment
I know i broke my oath
Pledge

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

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

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. Vow: A serious promise to do something.

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. Vow: She vowed never to speak to him again.

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

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