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   undo

   /ʌnˈduː/

   verb

   • 1. unfasten, untie, or loosen (something): "the knot was difficult to undo" Similar unfastenunbuttonunhookuntieunlaceunbindunfetterunshackleunmanacleunbridleunlockunboltuncoupleunhitchunlinkunclickloosenloosedisentangledisentwineextricatereleasedetachfreeset freeliberateopenunsealunwraplet outdisconnectdisjoindisengagedisuniteseparateOpposite fastendo up
   • 2. cancel or reverse the effects or results of (a previous action or measure): "there wasn't any way Evelyn could undo the damage" Similar revokeoverruleoverturnrepealrescindreverseretracttake backrule againstdisallowvetocountermandcancelannulnullifyrender null and voidinvalidaterender invalidnegateabrogatedisestablishmake ineffectiveset asidedo away withwipe outbring to an endavoidvacatearchaic:recallrare:disannulOpposite ratify
   • ▪ cancel (the last command executed by a computer): "you can frequently undo the error if you notice it in time"
   • 3. cause the downfall or ruin of: formal "Iago's hatred of women undoes him" Similar ruinundermineput an end toput at risksubvertoverturntopplescupperscotchsabotagespoilmess upmake a mess ofquashsquelchcrushharmcrippleimpairmardestroydevastateplay havoc withwrecksmashshatterannihilateeradicateobliteratedefeatcancel outneutralizerender ineffectivethwartupsetfoilfrustratehamperhinderobstructinformal:botchblowput the kibosh onfoul upmuck uplouse upblow a hole indo forcock upthrow a spanner in the works ofrain on someone's paradethrow a monkey wrench in the works ofvulgar slang:fuck upbugger upballs uparchaic:bring to naughtOpposite furtherenhancehelp

   noun

   • 1. a feature of a computer program that allows a user to cancel or reverse the last command executed: "the undo command"

   Word Origin Old Englishundōn (see un-2, do1).

   Scrabble Points: 5

   • U

     1

   • N

     1

   • D

     2

   • O

     1

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