Confirm vs Make damn sure

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

Confirm

Top 2,000 (common)B1verb

Make damn sure

InformalBeyond 10,000 (less common)
Most formal: ConfirmMost common: Confirm
 ConfirmMake damn sure
Pronunciation🇬🇧 //kənˈfɜːm//🇺🇸 //kənˈfɜrm//🇬🇧 //meɪk dæm ʃʊə//🇺🇸 //meɪk dæm ʃʊr//
MeaningTo say that something is true or to make sure of it.Make very certain about something
ExampleCan you confirm the time for the meeting tomorrow?You need to make damn sure that you lock the door before leaving.
RegisterNeutralInformal
How commonTop 2,000 (common)Beyond 10,000 (less common)
CEFR levelB1-
Part of speechverb
Collocationsconfirm a reservation, confirm an appointment, confirm information, confirm a hypothesis, confirm resultsmake sure, make damn sure, make absolutely sure, make sure not to forget, make damn certain
Antonymsdeny, disprove, reject-
Common mistakesConfused with 'affirm' which is more formal., Using 'confirm' without an object in sentences., Incorrectly assuming 'confirmed' is always followed by a date.Confusing 'make sure' and 'make damn sure' by using them interchangeably, Omitting 'damn' when emphasizing certainty, Misusing in overly formal settings
Usage notesUse 'confirm' in both formal and informal contexts, such as meetings or casual conversations. It's appropriate when verifying information or giving approval.Use in casual speech or writing to emphasize certainty. Avoid in formal contexts.

See it in real clips

Confirm
Make damn sure

Frequently asked questions: Confirm vs Make damn sure

What's the difference between Confirm and Make damn sure?

Confirm: To say that something is true or to make sure of it. Make damn sure: Make very certain about something

Which is more formal: Confirm and Make damn sure?

Confirm is the most formal of these.

Which is more common: Confirm and Make damn sure?

Confirm is the most common in everyday English.

Can you show an example of each?

Confirm: Can you confirm the time for the meeting tomorrow? Make damn sure: You need to make damn sure that you lock the door before leaving.

Can I use Confirm and Make damn sure interchangeably?

Not always. Confirm and Make damn sure 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