Where does “lâvra” come from?

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

lâvra (Franco-Provençal): lip

Definitions

Ancestry of “lâvra”, step by step

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

Every word from Proto-Indo-European lewh₃- →Every word from Proto-Indo-European léwh₃eti →Every word from Proto-Italic lawaō →