Proto-IE: *gʷetw-
Meaning: resin, sticky matter
Old Indian: jatu n. `lac, gum'
Latin: bitūmen, -inis n. `Erdpech'; betulla f. `Birke' (< Celt?: bitumen ex ea Galli excoquunt Plin. 16, 75)
Celtic: MIr beithe ( < *betu̯iā) `buxus'; Cymr bedw-en `Birke', OCorn bedew-en `populus', NBret bezv-enn ( < *betu̯ā) `Birke'; Gal betuin EN
Russ. meaning: смола, клейкое вещество
