Cancel vs Undo

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

Cancel

Top 1,000 (very common)B2verb

Undo

Top 2,000 (common)
Most common: Cancel
 CancelUndo
Pronunciation🇬🇧 //ˈkænsl//🇺🇸 //ˈkænsl//🇬🇧 //ʌnˈduː//🇺🇸 //ʌnˈdu//
MeaningTo decide that something will not happen.To reverse something you did.
ExampleI need to cancel my appointment for tomorrow.I had to undo my last changes because they didn't fit the project.
RegisterNeutralNeutral
How commonTop 1,000 (very common)Top 2,000 (common)
CEFR levelB2-
Part of speechverb
Collocationscancel a reservation, cancel a meeting, cancel an order, cancel a flightundo changes, undo a mistake, undo an action, undo settings, undo a decision
Antonymsconfirm, continue, scheduleredo, execute, confirm
Common mistakesConfused with 'cancellation', which is a noun., Using 'canceled' instead of 'cancelled' in British English., Omitting the object, e.g., saying 'I will cancel' without specifying what.Confused with 'redo' which means to do again., Using 'undo' without an object, e.g., 'undo it' instead of just 'undo'., Incorrectly assuming 'undo' can be applied to physical actions.
Usage notesUsed in formal and informal contexts; appropriate when discussing plans, subscriptions, or events. Avoid using it when talking about permanent decisions.Commonly used in technology and editing contexts. Not typically used in formal writing.

See it in real clips

Cancel
Undo

Frequently asked questions: Cancel vs Undo

What's the difference between Cancel and Undo?

Cancel: To decide that something will not happen. Undo: To reverse something you did.

Which is more common: Cancel and Undo?

Cancel is the most common in everyday English.

Can you show an example of each?

Cancel: I need to cancel my appointment for tomorrow. Undo: I had to undo my last changes because they didn't fit the project.

Can I use Cancel and Undo interchangeably?

Not always. Cancel and Undo 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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