Commit vs You can't promise somethin' like that

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

Commit

Top 1,000 (very common)B1verb

You can't promise somethin' like that

InformalTop 2,000 (common)
Most formal: CommitMost common: Commit
 CommitYou can't promise somethin' like that
Pronunciation🇬🇧 /["/kəˈmɪt/","/kəˈmɪts/","/kəˈmɪtɪd/","/kəˈmɪtɪŋ/"]/🇺🇸 /["/kəˈmɪt/","/kəˈmɪts/","/kəˈmɪtɪd/","/kəˈmɪtɪŋ/"]/🇬🇧 //juː kɑːnt ˈprɒmɪs ˈsʌmθɪŋ laɪk ðæt//🇺🇸 //ju kɑnt ˈprɑmɪs ˈsʌmθɪŋ laɪk ðæt//
MeaningTo promise to do something or to dedicate oneself to a decision.You cannot make a promise about something like that.
ExampleI need to commit to a healthier lifestyle this year.You can't promise somethin' like that; it's just too risky.
RegisterNeutralInformal
How commonTop 1,000 (very common)Top 2,000 (common)
CEFR levelB1-
Part of speechverb
Collocationscommit a crime, commit to a plan, commit resources, commit fully, commit yourselfmake a promise, keep a promise, promise to help, promise someone, promise you won't
Antonymsabandon, withdraw, distract-
Common mistakesConfused with 'submit' — 'commit' refers to dedication, while 'submit' means to turn in something., Using 'commit' without an object — remember to specify what you are committing to.'Promise' is often confused with 'guarantee', which have different meanings., Learners may forget to use 'that' after 'like' when trying to convey a specific example., 'Somethin'' is sometimes mistakenly written as 'something' in informal contexts.
Usage notesUse 'commit' when referring to making a strong promise or dedication, often in serious contexts like relationships or projects. Avoid using it in casual situations unless it's about a commitment to a plan.Used in casual conversation, often implies doubt or impossibility about the promise made.

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Commit
You can't promise somethin' like that

Frequently asked questions: Commit vs You can't promise somethin' like that

What's the difference between Commit and You can't promise somethin' like that?

Commit: To promise to do something or to dedicate oneself to a decision. You can't promise somethin' like that: You cannot make a promise about something like that.

Which is more formal: Commit and You can't promise somethin' like that?

Commit is the most formal of these.

Which is more common: Commit and You can't promise somethin' like that?

Commit is the most common in everyday English.

Can you show an example of each?

Commit: I need to commit to a healthier lifestyle this year. You can't promise somethin' like that: You can't promise somethin' like that; it's just too risky.

Can I use Commit and You can't promise somethin' like that interchangeably?

Not always. Commit and You can't promise somethin' like that 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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