Where does “lavre” come from?

lavre (Middle English) 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.

Ancestry of “lavre”, step by step

StepLanguageWordMeaning
1Latinlābrumlip
2Latinlavābrum—
3Latinlavōto wash, bathe
4Proto-Italiclawaō—
5Proto-Indo-Europeanléwh₃eti—
6Proto-Indo-Europeanlewh₃-to wash
Every word from Proto-Indo-European lewh₃- →Every word from Proto-Indo-European léwh₃eti →Every word from Proto-Italic lawaō →