Undoer

un·do  (n-d)

v. un·did (-dd), un·done (-dn), un·do·ing (-dng), un·does (-dz)

v.tr.

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.

4.

a. To cause the ruin or downfall of; destroy.

b. To throw into confusion; unsettle.

5. Obsolete To solve or interpret; unravel.

v.intr.

To come open or unfastened.

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un·doer n.

Thesaurus

Noun	1.	undoer - a seducer who ruins a woman; "she awoke in the arms of her cruel undoer" ladies' man, lady killer, seducer - a man who takes advantage of women
	2.	undoer - a person who unfastens or unwraps or opens; "children are talented undoers of their shoelaces" unfastener, untier, opener individual, mortal, person, somebody, someone, soul - a human being; "there was too much for one person to do"
	3.	undoer - a person who destroys or ruins or lays waste to; "a destroyer of the environment"; "jealousy was his undoer"; "uprooters of gravestones" ruiner, uprooter, waster, destroyer annihilator - a total destroyer bad person - a person who does harm to others iconoclast, image breaker - a destroyer of images used in religious worship diversionist, saboteur, wrecker - someone who commits sabotage or deliberately causes wrecks vandal - someone who willfully destroys or defaces property