Where does “odō” come from?

odō (Proto-Italic) comes from Proto-Indo-European h₃ed- — to smell, stink; to hate; to bite.

Ancestry of “odō”, step by step

Step	Language	Word	Meaning
1	Proto-Indo-European	h₃ed-	to smell, stink; to hate; to bite

odō — Etymology, Origin & Word History | Etymology Explorer