Where does “vomitōrium” come from?

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

Ancestry of “vomitōrium”, step by step

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

vomitōrium — Etymology, Origin & Word History | Etymology Explorer