Where does “lābrum” come from?

lābrum (Latin) comes from Latin lavābrum, from Latin lavō, from Proto-Italic lawaō, from Proto-Indo-European léwh₃eti, from Proto-Indo-European lewh₃- — to wash.

Ancestry of “lābrum”, step by step

Step	Language	Word	Meaning
1	Latin	lavābrum	—
2	Latin	lavō	—
3	Proto-Italic	lawaō	—
4	Proto-Indo-European	léwh₃eti	—
5	Proto-Indo-European	lewh₃-	to wash

Every word from Proto-Indo-European lewh₃- →

lābrum — Etymology, Origin & Word History | Etymology Explorer