undoer n a seducer who ruins a woman she awoke in the arms of her cruel undoer n a person who unfastens or unwraps or opens children are talented undoers of their shoelaces n a person who destroys or ruins or lays waste to jealousy was his undoer Usage(s) The next evil undoer of righteous Germany to be taken up was Bolshevism, by which, roared Siegfried Hitler, "the world of supernatural imagination is torn apart, a God is . He arranges for an abortion, although he is not the deb's undoer. Synonym(s) opener unfastener untier destroyer ruiner waster uprooter