Where does “cobratura” come from?

cobratura (Italian) comes from Spanish cobre, from Latin cūprum, from Latin cȳprium, from Ancient Greek Κύπρος, from Ancient Greek -ῐος, from Proto-Indo-European -yós — Creates adjectives from noun or verb stems.

cobratura (Italian): The operation performed on wooden posts intended to be driven into the ground, consisting of injecting copper salts into the fibers of the post