Where does “лава” come from?

лава (Old East Slavic) comes from Proto-Slavic lava, from Proto-Balto-Slavic lā́ˀwāˀ, from Proto-Indo-European leh₂wéh₂.

Ancestry of “лава”, step by step

StepLanguageWordMeaning
1Proto-Slaviclavabench
2Proto-Balto-Slaviclā́ˀwāˀplace to sleep; bench, bed
3Proto-Indo-Europeanleh₂wéh₂

Words derived from “лава

Every word from Proto-Indo-European leh₂wéh₂Every word from Proto-Balto-Slavic lā́ˀwāˀEvery word from Proto-Slavic lava