Meaning of undoer

(noun) a seducer who ruins a woman; "she awoke in the arms of her cruel undoer"

a person who unfastens or unwraps or opens; "children are talented undoers of their shoelaces"

a person who destroys or ruins or lays waste to; "a destroyer of the environment"; "jealousy was his undoer"; "uprooters of gravestones"