Where does “vomitō” come from?

vomitō (Latin) comes from Latin vomō, from Proto-Indo-European wemh₁- — to spew, to vomit.

Ancestry of “vomitō”, step by step

Step	Language	Word	Meaning
1	Latin	vomō	—
2	Proto-Indo-European	wemh₁-	to spew, to vomit