Where does “ἠθολογία” come from?

ἠθολογία (Ancient Greek) comes from Ancient Greek ἠθολόγος, from Ancient Greek ἦθος, from Ancient Greek ἔθος, from Proto-Indo-European swe-dʰh₁-, from Proto-Indo-European dʰeh₁- — to do, put, place.

ἠθολογία (Ancient Greek): a painting of character, especially by mimic...