amputation (n.)
1610s, "a cutting off of tree branches, a pruning," also "operation of cutting off a limb, etc., of a body," from Middle French amputation or directly from Latin amputationem (nominative amputatio), noun of action from past participle stem of amputare "cut off, lop off; cut around, to prune," from am(bi)- "about" (see ambi-) + putare "to prune, trim" (see pave).