Where does “χειρουργικός” come from?

χειρουργικός (Ancient Greek) comes from Ancient Greek χειρουργός, from Ancient Greek -ουργός, from Ancient Greek ἔργον, from Proto-Hellenic wérgon, from Proto-Indo-European wérǵom, from Proto-Indo-European werǵ- — to make.

χειρουργικός (Ancient Greek): surgical