Where does “transversalis” come from?

transversalis (Latin) comes from Latin transversus, from Proto-Italic *trānsworssos.

transversalis (Latin): transverse

Definitions

Step	Language	Word	Meaning
1	Latin	transversus	turned across, lying across, from side to side;...
2	Proto-Italic	*trānsworssos	—

transversalis — Etymology, Origin & Word History | Etymology Explorer