Where does “odio” come from?

odio (Galician) comes from Latin odium, from Proto-Indo-European h₃ed- — to smell, stink; to hate; to bite.

odio (Galician): hate; first-person singular present indicative of...

Definitions

Step	Language	Word	Meaning
1	Latin	odium	hatred, ill-will, aversion, dislike, disgust,...
2	Proto-Indo-European	h₃ed-	to smell, stink; to hate; to bite

odio — Etymology, Origin & Word History | Etymology Explorer