Where does “ethica” come from?

ethica (Medieval Latin) comes from Ancient Greek ἠθικός, from Ancient Greek ἦθος, from Ancient Greek ἔθος, from Proto-Indo-European swe-dʰh₁-, from Proto-Indo-European dʰeh₁- — to do, put, place.

Ancestry of “ethica”, step by step

Step	Language	Word	Meaning
1	Ancient Greek	ἠθικός	of or for morals; moral; expressing character
2	Ancient Greek	ἦθος	character; custom, habit
3	Ancient Greek	ἔθος	habit, custom, manner; disposition, temper;...
4	Proto-Indo-European	swe-dʰh₁-	—
5	Proto-Indo-European	dʰeh₁-	to do, put, place

Words derived from “ethica”

etika

Every word from Proto-Indo-European dʰeh₁- →Every word from Proto-Indo-European swe-dʰh₁- →Every word from Ancient Greek ἔθος →