Promise vs That's a pretty big commitment

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

Promise

Top 1,000 (very common)A2verb

That's a pretty big commitment

Top 5,000 (fairly common)
Most common: Promise
 PromiseThat's a pretty big commitment
Pronunciation🇬🇧 /["/ˈprɒmɪs/","/ˈprɒmɪsɪz/","/ˈprɒmɪst/","/ˈprɒmɪsɪŋ/"]/🇺🇸 /["/ˈprɑːmɪs/","/ˈprɑːmɪsɪz/","/ˈprɑːmɪst/","/ˈprɑːmɪsɪŋ/"]/🇬🇧 //ðæts ə ˈprɪti bɪg kəˈmɪtmənt//🇺🇸 //ðæts ə ˈprɪti bɪg kəˈmɪtmənt//
MeaningA commitment to do something or not do something.It's a significant promise or responsibility.
ExampleI promise to help you with your homework.Buying a house really is a pretty big commitment.
RegisterNeutralNeutral
How commonTop 1,000 (very common)Top 5,000 (fairly common)
CEFR levelA2-
Part of speechverb
Collocationsfaithfully, solemnly, initially, can, cannot, seem to, to, as promised, I can’t promise anythingmake a commitment, big commitment, long-term commitment, serious commitment, financial commitment
Antonymslie, break, betray-
Common mistakesConfusing '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).Using 'commitment' incorrectly as a verb instead of a noun., Confusing 'commitment' with 'agreement' - a commitment is more personal., Overusing 'pretty' in formal speech.
Usage notesUse 'promise' when you want to express a vow or assurance. Common in both spoken and written contexts, but avoid in formal legal documents.Use in contexts discussing promises or responsibilities, often when emphasizing importance. It’s suitable for casual conversations, but can be used in formal contexts if necessary.

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Promise
That's a pretty big commitment

Frequently asked questions: Promise vs That's a pretty big commitment

What's the difference between Promise and That's a pretty big commitment?

Promise: A commitment to do something or not do something. That's a pretty big commitment: It's a significant promise or responsibility.

Which is more common: Promise and That's a pretty big commitment?

Promise is the most common in everyday English.

Can you show an example of each?

Promise: I promise to help you with your homework. That's a pretty big commitment: Buying a house really is a pretty big commitment.

Can I use Promise and That's a pretty big commitment interchangeably?

Not always. Promise and That's a pretty big commitment 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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