undid
ˌən-ˈdid 
ˈən-
; undone
ˌən-ˈdən
ˈən-
; undoing
ˌən-ˈdü-iŋ
ˈən-
; undoes
ˌən-ˈdəz,
ˈən-
1
: to open or loosen by releasing a fastening
undid her jacket
2
: to make of no effect or as if not done : make null : reverse
The damage cannot be undone.
3
a
: to ruin the worldly means, reputation, or hopes of
a politician undone by scandal
b
: to disturb the composure of : upset
she's come undone
c
: to come open or apart
Examples of undo in a Sentence
You can't undo the past.
The damage cannot be undone.
He was undone by greed.
Recent Examples on the Web
The only way to undo the carbon legacy of 1960s blast furnaces is to transform core processes, a task made urgent by new carbon taxes, investor mandates, and customer demands.
—
Srishti Gupta, Interesting Engineering, 23 Dec. 2025
Meanwhile, its ostensibly heartwarming elements are undone by their vagueness.
—Angie Han, HollywoodReporter, 23 Dec. 2025
Japanese leaders had learned that deals struck with willing South Korean conservatives often reflected support from only half the electorate and could easily be undone when their political fortunes diminished or progressive successors took office.
—Ayumi Teraoka, Foreign Affairs, 19 Dec. 2025
That shift would train audiences to expect movies at home first, theaters second — an irreversible change in consumer behavior that no future studio could undo.
—Joseph M. Singer, Deadline, 19 Dec. 2025
See All Example Sentences for undo
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Srishti Gupta, Interesting Engineering, 23 Dec. 2025
Meanwhile, its ostensibly heartwarming elements are undone by their vagueness.
—Angie Han, HollywoodReporter, 23 Dec. 2025
Japanese leaders had learned that deals struck with willing South Korean conservatives often reflected support from only half the electorate and could easily be undone when their political fortunes diminished or progressive successors took office.
—Ayumi Teraoka, Foreign Affairs, 19 Dec. 2025
That shift would train audiences to expect movies at home first, theaters second — an irreversible change in consumer behavior that no future studio could undo.
—Joseph M. Singer, Deadline, 19 Dec. 2025
See All Example Sentences for undo
Cite this Entry
“Undo.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/undo. Accessed 27 Dec. 2025.
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