'Undoer' definitions:

Definition of 'undoer'

From: WordNet
noun
A seducer who ruins a woman; "she awoke in the arms of her cruel undoer"
noun
A person who unfastens or unwraps or opens; "children are talented undoers of their shoelaces" [syn: undoer, opener, unfastener, untier]
noun
A person who destroys or ruins or lays waste to; "a destroyer of the environment"; "jealousy was his undoer"; "uprooters of gravestones" [syn: destroyer, ruiner, undoer, waster, uprooter]

Definition of 'Undoer'

From: GCIDE
  • Undoer \Un*do"er\, n. One who undoes anything; especially, one who ruins another. [1913 Webster]