undid
ˌən-ˈdid 
ˈən-
; undone
ˌən-ˈdən
ˈən-
; undoing
ˌən-ˈdü-iŋ
ˈən-
1
: to open or loose by releasing a fastening
2
: to make of no effect or as if not done : make null : reverse
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
Synonyms
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 president-elect’s hands are otherwise tied on the TikTok ban, which—unless the Supreme Court overturns it—can’t be undone unless Congress repeals it.
—
Alison Durkee, Forbes, 10 Jan. 2025
But within two years, Carter’s successor, Ronald Reagan, worked to undo his reforms and soon launched wars in both Nicaragua, to oust the Sandinistas, and neighboring El Salvador to support its right-wing military government.
—Tracy Wilkinson, Los Angeles Times, 9 Jan. 2025
Some congressional Republicans have threatened to undo the rule, and the collections industry is likely to challenge it in court.
—Claire Bugos, Verywell Health, 8 Jan. 2025
While Trump would no doubt attempt to reverse the decision, Biden officials are heartened by a ruling during the first Trump administration, when a federal court blocked efforts to undo Obama-era environmental regulations.
—The Editors, National Review, 6 Jan. 2025
See all Example Sentences for undo 
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Alison Durkee, Forbes, 10 Jan. 2025
But within two years, Carter’s successor, Ronald Reagan, worked to undo his reforms and soon launched wars in both Nicaragua, to oust the Sandinistas, and neighboring El Salvador to support its right-wing military government.
—Tracy Wilkinson, Los Angeles Times, 9 Jan. 2025
Some congressional Republicans have threatened to undo the rule, and the collections industry is likely to challenge it in court.
—Claire Bugos, Verywell Health, 8 Jan. 2025
While Trump would no doubt attempt to reverse the decision, Biden officials are heartened by a ruling during the first Trump administration, when a federal court blocked efforts to undo Obama-era environmental regulations.
—The Editors, National Review, 6 Jan. 2025
See all Example Sentences for undo
Dictionary Entries Near undo
Cite this Entry
“Undo.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/undo. Accessed 20 Jan. 2025.
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