Definitions for undoer
a seducer who ruins a woman
"she awoke in the arms of her cruel undoer"
undoer, opener, unfastener, untier(noun)
a person who unfastens or unwraps or opens
"children are talented undoers of their shoelaces"
destroyer, ruiner, undoer, waster, uprooter(noun)
a person who destroys or ruins or lays waste to
"a destroyer of the environment"; "jealousy was his undoer"; "uprooters of gravestones"
; one who undoes.
one who undoes anything; especially, one who ruins another