Where does “tran-” come from?

tran- (English) comes from Latin trāns, from Latin Padus, from Lepontic Bodincus, from Proto-Indo-European bʰudʰmḗn, from Proto-Indo-European dʰewbʰ-, from Proto-Indo-European dʰewh₂- — smoke; mist, haze.

Ancestry of “tran-”, step by step

Step	Language	Word	Meaning
1	Latin	trāns	across, beyond
2	Latin	Padus	the River Po
3	Lepontic	Bodincus	—
4	Proto-Indo-European	bʰudʰmḗn	bottom
5	Proto-Indo-European	dʰewbʰ-	deep
6	Proto-Indo-European	dʰewh₂-	smoke; mist, haze

Words derived from “tran-”

transonic
tranship
transonically
transhape
transexion
transonics

Every word from Proto-Indo-European dʰewh₂- →Every word from Proto-Indo-European dʰewbʰ- →Every word from Proto-Indo-European bʰudʰmḗn →