It must be ' antonym of amputation ', although this is not a dictionary of antonyms. And I do not know if there is an antonym of amputation, in Spanish exists to implant, but it is very debatable. And it won't be done in an entry with spelling mistakes, that's for sure.
They are synonymous with amputation: curtail, cut, mutilate. Obviously the antonyms are the opposite: to implant, to unite, to add, to add, to sew, to prolong.