Where does “ῥωμαϊστί” come from?

ῥωμαϊστί (Ancient Greek) comes from Ancient Greek ῥωμαῖος, from Ancient Greek -αῖος, from Ancient Greek -ῐος, from Proto-Indo-European -yós — Creates adjectives from noun or verb stems.

ῥωμαϊστί (Ancient Greek): in Latin (language)

Definitions

in Latin (language)

Ancestry of “ῥωμαϊστί”, step by step

Step	Language	Word	Meaning
1	Ancient Greek	ῥωμαῖος	Roman
2	Ancient Greek	-αῖος	Suffix added to nouns or adjectives, forming adjectives: pertaining to, belonging to ("of")
3	Ancient Greek	-ῐος	belonging to; of”, “belonging to”, “pertaining to
4	Proto-Indo-European	-yós	Creates adjectives from noun or verb stems

Every word from Proto-Indo-European -yós →Every word from Ancient Greek -ῐος →Every word from Ancient Greek -αῖος →