Where does “laubiją” come from?

laubiją (Proto-Germanic) comes from Proto-Indo-European lewbʰ-, from Proto-Indo-European lēw- — to sound, resound, sing out; to leave.

Ancestry of “laubiją”, step by step

Step	Language	Word	Meaning
1	Proto-Indo-European	lewbʰ-	to desire, covet, want; to admire, praise; to...
2	Proto-Indo-European	lēw-	to sound, resound, sing out; to leave

laubiją — Etymology, Origin & Word History | Etymology Explorer