Where does “lavaus” come from?

lavaus (Middle English) comes from Finnish lavata, from Finnish lava, from Proto-Finnic lava, from Proto-Baltic lā́ˀwāˀ.

Ancestry of “lavaus”, step by step

StepLanguageWordMeaning
1Finnishlavatato palletize cargo
2Finnishlavabed; platform; stage
3Proto-Finniclavasleeping place, bed
4Proto-Balticlā́ˀwāˀ—
Every word from Proto-Baltic lā́ˀwāˀ →Every word from Proto-Finnic lava →Every word from Finnish lava →