Where does “străinuc” come from?

străinuc (Romanian) comes from Romanian străin, from Latin extrāneus, from Latin -āneus, from Latin -eus, from Proto-Italic *-eos — Forms adjectives indicating being formed out of a material.

Ancestry of “străinuc”, step by step

Step	Language	Word	Meaning
1	Romanian	străin	foreign, strange; foreigner, alien
2	Latin	extrāneus	foreign
3	Latin	-āneus	forming adjectives Of or pertaining to; -aneous
4	Latin	-eus	argentum + API → argenteus; ferrum + API →...
5	Proto-Italic	*-eos	Forms adjectives indicating being formed out of a material

Every word from Proto-Italic *-eos →Every word from Latin -eus →Every word from Latin -āneus →