Details
Do
'to perform (an action, the precise nature of which is often unspecified)'
carry out undertake discharge execute perpertate perform accomplish implement achieve complete achieve complete finish conclude bring about engineer effect realize
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Undo
'to unfasten, untie, or loosen (something)'
'cancel or reverse the effects or results of (a previous action or measure)'
revoke overrule overturn repeal rescind reverse retract take back rule against disallow veto
countermand cancel annul nullify render null and void invalidate render invalid disestablish
negate abrogate make ineffective, set aside do away with wipe out bring to an end