Meaning & use
undid
Last updated
Reversed or negated the effect of a previous action, or unfastened something (past tense of undo).
See it in a sentence
One careless mistake undid months of careful planning.
She undid the knot with a quick tug.
A note on using this word
"Undo" is one of the few English verbs whose past tense mirrors "do" (did) with the added prefix "un-."
Words with a similar meaning
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