Spelling.School · How to spell

How to spell undo

What it means: To cancel an action.

In a sentence: You can click the button to undo your last action. ▶

The part people get wrong

Often misspelled as undue or undoo.

Same family: did, done, doing, redo, overdo. If you can spell one, the shared part carries to the others.

Where it comes from: “Undo” comes from Old English “undōn,” meaning to open, unfasten, or reverse an action. The prefix “un-” has been used for over a thousand years in English to show reversal, as in “untie,” “unpack,” and “uncover.”

Patterns it uses: Prefixes keep every letter

Try spelling it

You will hear the word and a sentence. Type it and press Enter. Then four more words from the same level, so you know where you stand.

Words like this

unsure · unsafe · unlock · unkind · uncover

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