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v. un·did (-dĭd′), un·done (-dŭn′), un·do·ing (-do͞o′ĭng), un·does (-dŭz′)
1. To reverse or erase; annul: impossible to undo the suffering caused by the war.
2. To untie, disassemble, or loosen: undo a shoelace.
3. To open (a parcel, for example); unwrap.
a. To cause the ruin or downfall of; destroy.
b. To throw into confusion; unsettle.
To come open or unfastened.
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|Noun||1.||undoer - a seducer who ruins a woman; "she awoke in the arms of her cruel undoer"|
|2.||undoer - a person who unfastens or unwraps or opens; "children are talented undoers of their shoelaces"|
|3.||undoer - a person who destroys or ruins or lays waste to; "a destroyer of the environment"; "jealousy was his undoer"; "uprooters of gravestones"|
annihilator - a total destroyer
bad person - a person who does harm to others
vandal - someone who willfully destroys or defaces property