undo
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un·do

verb \ˌən-ˈdü, ˈən-\
un·did\-ˈdid\un·done\-ˈdən\un·do·ing\-ˈdü-iŋ\

Definition of UNDO

transitive verb
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 : seduce 3
intransitive verb
: to come open or apart
un·do·er \-ˈdü-ər\ noun

Examples of UNDO

  1. You can't undo the past.
  2. The damage cannot be undone.
  3. He was undone by greed.

First Known Use of UNDO

before 12th century

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