Where does “într-o” come from?

într-o (Romanian) comes from Romanian O, from Latin ūna, from Latin hōra, from Ancient Greek ὥρα, from Proto-Hellenic *worā, from Proto-Indo-European wēr-, from Proto-Indo-European wer- — to burn; to cover, heed, notice; squirrel.

într-o (Romanian): in a; into a

Definitions

in a; into a

Ancestry of “într-o”, step by step

într-o traces back through two separate lines of ancestry.

via Romanian O

Step	Language	Word	Meaning
1	Romanian	O	a/an indefinite article
2	Latin	ūna	together, simultaneously, at the same time
3	Latin	hōra	hour
4	Ancient Greek	ὥρα	any defined period of time; season; climate
5	Proto-Hellenic	*worā	—
6	Proto-Indo-European	wēr-	true
7	Proto-Indo-European	wer-	to burn; to cover, heed, notice; squirrel

via Romanian întru

Step	Language	Word	Meaning
1	Romanian	întru	in
2	Latin	intrō	to enter, go into, come in, get in, penetrate
3	Latin	intra	within; inside; during; less than
4	Latin	interus	—
5	Proto-Indo-European	h₁énteros	inside, within
6	Proto-Indo-European	-teros	Contrastive or oppositional adjectival suffix

Every word from Proto-Indo-European wer- →Every word from Proto-Indo-European wēr- →Every word from Proto-Hellenic *worā →