Where does “σκατολογία” come from?

σκατολογία (Greek) comes from Greek σκατό-, from Ancient Greek σκῶρ, from Proto-Hellenic skṓr, from Proto-Indo-European sḱṓr, from Proto-Indo-European sóḱr̥, from Proto-Indo-European -r̥ — Derives nouns from roots, frequently mass nouns.

σκατολογία (Greek): scatology