Where does “bastasius” come from?

bastasius (Medieval Latin) comes from Latin bastaga, from Ancient Greek βασταγή, from Ancient Greek -ή, from Ancient Greek -ᾱ, from Proto-Indo-European -éh₂.

Ancestry of “bastasius”, step by step

Step	Language	Word	Meaning
1	Latin	bastaga	burden, load; luggage
2	Ancient Greek	βασταγή	transport
3	Ancient Greek	-ή	suffix of feminine nouns in the [[Appendix:Ancient Greek first declension
4	Ancient Greek	-ᾱ	nominal suffix
5	Proto-Indo-European	-éh₂	—

Every word from Proto-Indo-European -éh₂ →Every word from Ancient Greek -ή →Every word from Ancient Greek -ᾱ →